@article{DESOUSA2022114426,

title = {Wear-out failure analysis of modular multilevel converter-based STATCOM: The role of the modulation strategy and IGBT blocking voltage},

author = {R. O. Sousa and A. F. Cupertino and L. M. F. Morais and H. A. Pereira},

url = {https://www.sciencedirect.com/science/article/pii/S0026271421003929},

doi = {https://doi.org/10.1016/j.microrel.2021.114426},

issn = {0026-2714},

year  = {2022},

date = {2022-01-01},

journal = {Microelectronics Reliability},

volume = {128},

pages = {114426},

abstract = {The modular multilevel converter (MMC) is an attractive option for medium- and high-voltage static synchronous compensator (STATCOM) application. For this application, three aspects are relevant. Firstly, reliability and efficiency are directly related to the operation costs of this converter. Secondly, either high IGBT blocking voltage capability, featuring few number of submodules (SMs), or low-voltage IGBT modules, with a larger number of SMs, can be employed in an MMC-STATCOM. Lastly, either modulation strategies with fixed or variable switching frequency can be employed. Nevertheless, the literature does not present works evaluating these three aspects of an MMC-STATCOM at the same time. Therefore, this paper analyzes the impact of modulation strategies and number of SMs on wear-out failure and efficiency of an MMC-STATCOM. The effect of all SM components is considered. Two distinct modulation strategies are selected: phase-shifted pulse-width modulation (PS-PWM), with fixed switching frequency, and nearest-level control with cell tolerance band algorithm (NLC-CTB), with variable switching frequency. Four commercially available semiconductor blocking voltages are considered to evaluate the converter with different number of SMs. The results demonstrate that the number of SMs and the modulation strategy affect the MMC-STATCOM performance. Indeed, the converter presents different reliability at system-level and energy losses per year, depending on the IGBT blocking voltage and modulation strategy. The design with higher IGBT blocking voltage is the most affected.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9141439,

title = {An Improved Voltage-Shifting Strategy to Attain Concomitant Accurate Power Sharing and Voltage Restoration in Droop-Controlled DC Microgrids},

author = {Waner Wodson A. G. Silva and Thiago R. Oliveira and Pedro F. Donoso-Garcia},

doi = {10.1109/TPEL.2020.3009619},

year  = {2021},

date = {2021-01-01},

journal = {IEEE Transactions on Power Electronics},

volume = {36},

number = {2},

pages = {2396-2406},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9059011,

title = {Model-Free Energy Management System for Hybrid Alternating Current/Direct Current Microgrids},

author = {Danilo I. Brandao and Rhonei P. dos Santos and Waner Wodson A. G. Silva and Thiago R. Oliveira and Pedro Francisco Donoso-Garcia},

doi = {10.1109/TIE.2020.2984993},

year  = {2021},

date = {2021-01-01},

journal = {IEEE Transactions on Industrial Electronics},

volume = {68},

number = {5},

pages = {3982-3991},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{LOPEZSEGUEL2021,

title = {Comparison of the performance of MPPT methods applied in converters Buck and Buck-Boost for autonomous photovoltaic systems},

author = {Julio Lopez Seguel and S. I Seleme Jr and Lenin M. F Morais},

url = {http://www.scielo.cl/scielo.php?script=sci_arttext\&pid=S0718-33052021000200229\&nrm=iso},

issn = {0718-3305},

year  = {2021},

date = {2021-01-01},

urldate = {2021-01-01},

journal = {Ingeniare. Revista chilena de ingeniera},

volume = {29},

pages = {229 - 244},

publisher = {scielocl},

crossref = {10.4067/S0718-33052021000200229},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{ROSA2021106545,

title = {Practical considerations of nonlinear control techniques applied to static power converters: A survey and comparative study},

author = {A. H. R. Rosa and L. M. F. Morais and G. O. Fortes and S. I. Seleme J\'{u}nior},

url = {https://www.sciencedirect.com/science/article/pii/S0142061519324469},

doi = {https://doi.org/10.1016/j.ijepes.2020.106545},

issn = {0142-0615},

year  = {2021},

date = {2021-01-01},

journal = {International Journal of Electrical Power \& Energy Systems},

volume = {127},

pages = {106545},

abstract = {In light of robustness and specific characteristics of the semiconductor switches and converters, nonlinear controllers perceive power electronics as an important application field. As there is still a gap between theory and practice because of the complexity of this theme for an initial contact, many students and industrial engineers are discouraged. Generally and intuitively, the aim of this paper is to present some practical considerations such as: simple procedure to obtain nonlinear equations, sinusoidal, three-phase and isolated cases, indispensable techniques like load estimation and PI controller for output voltage regulation, Hardware in The Loop (HIL) Simulation and hybrid solutions. An additional goal is the comparative study of three nonlinear control methods - state feedback linearization (SFL), passivity based control (PBC) and interconnection and damping assignment passivity based control (IDA-PBC), all of which are applied to seven static power converters: buck, boost, buck-boost, flyback, 3-phase boost, CUK and SEPIC. Comparative figures and tables are constructed to evidence the similarities and differences between the techniques and converters. The results are shown from a qualitative viewpoint.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9234018,

title = {Optimum Design of MMC-Based ES-STATCOM Systems: The Role of the Submodule Reference Voltage},

author = {Jonathan Hunder Dutra Gherard Pinto and William Caires Silva Amorim and Allan Fagner Cupertino and Heverton Augusto Pereira and Seleme Isaac Seleme Junior and Remus Teodorescu},

doi = {10.1109/TIA.2020.3032381},

year  = {2021},

date = {2021-01-01},

journal = {IEEE Transactions on Industry Applications},

volume = {57},

number = {3},

pages = {3064-3076},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{en14041001,

title = {Robust Digital Control Strategy Based on Fuzzy Logic for a Solar Charger of VRLA Batteries},

author = {Julio L\'{o}pez Seguel and Seleme I. Seleme},

url = {https://www.mdpi.com/1996-1073/14/4/1001},

doi = {10.3390/en14041001},

issn = {1996-1073},

year  = {2021},

date = {2021-01-01},

journal = {Energies},

volume = {14},

number = {4},

abstract = {This paper presents the design and implementation of a digital control strategy for a Buck converter, used as a solar charger of valve-regulated lead acid (VRLA) batteries. The control system consists of two fuzzy logic controllers (FLCs), which adjust the appropriate increment of the converter duty cycle based on battery state of charge according to a three-stage charging scheme. One FLC works as a maximum power point tracker (FLC-MPPT), while the other regulates the battery voltage (FLC-VR). This approach of using two different set of membership functions overcomes the limitations of the battery chargers with a single control function, where the voltage supplied to the battery is either not constant due to the operation of the MPPT algorithm (possibly damaging the battery) or is constant due to the operation of the voltage control (hence, MPP cannot be achieved). In this way, the proposed control approach has the advantage of extracting the maximum energy of the PV panel, preventing battery damage caused by variable MPPT voltage, thereby extending the battery’s lifetime. Moreover, it allows overcoming of the drawbacks of the conventional solar chargers, which become slow or inaccurate during abrupt changes in weather conditions. The strategy is developed to be implemented in a low-cost AT91SAM3X8E Arduino Due microcontroller. Simulations by MATLAB/Simulink and experimental results from hardware implementation are provided and discussed, which validate the reliability and robustness of the control strategy.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9233439,

title = {On Converter Fault Tolerance in MMC-HVDC Systems: A Comprehensive Survey},

author = {Jo\~{a}o Victor Matos Farias and Allan Fagner Cupertino and Heverton Augusto Pereira and Seleme Isaac Seleme and Remus Teodorescu},

doi = {10.1109/JESTPE.2020.3032393},

year  = {2021},

date = {2021-01-01},

journal = {IEEE Journal of Emerging and Selected Topics in Power Electronics},

volume = {9},

number = {6},

pages = {7459-7470},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9229082,

title = {Novel Multirate Modulator for High-Bandwidth Multicell Converters},

author = {Tiago S\'{a} Ferreira and Guilherme Monteiro Rezende and Lenin Martins Ferreira Morais and Victor Flores Mendes and Didier Flumian and J\'{e}r\'{e}mi R\'{e}gnier and Thierry A. Meynard},

doi = {10.1109/TPEL.2020.3032118},

year  = {2021},

date = {2021-01-01},

journal = {IEEE Transactions on Power Electronics},

volume = {36},

number = {4},

pages = {4887-4900},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{en14248348,

title = {Analysis of Stationary- and Synchronous-Reference Frames for Three-Phase Three-Wire Grid-Connected Converter AC Current Regulators},

author = {Israel D. L. Costa and Danilo I. Brandao and Louren\c{c}o Matakas Junior and Marcelo G. Sim\~{o}es and Lenin M. F. Morais},

url = {https://www.mdpi.com/1996-1073/14/24/8348},

doi = {10.3390/en14248348},

issn = {1996-1073},

year  = {2021},

date = {2021-01-01},

journal = {Energies},

volume = {14},

number = {24},

abstract = {The current state of the art shows that unbalance and distortion on the voltage waveforms at the terminals of a grid-connected inverter disturb its output currents. This paper compares AC linear current regulators for three-phase three-wire voltage source converters with three different reference frames, namely: (1) natural (abc), (2) orthogonal stationary (\α\β), and (3) orthogonal synchronous (dq). The quantitative comparison analysis is based on mathematical models of grid disturbances using the impedance-based analysis, the computational effort assessment, as well as the steady-state and transient performance evaluation based on experimental results. The control scheme devised in the dq-frame has the highest computational effort and inferior performance under negative-sequence voltage disturbances, whereas it shows superior performance under positive-sequence voltages among the reference frames evaluated. In contrast, the stationary natural frame abc has the lowest computational effort due to its straightforward implementation, with similar results in terms of steady-state and transient behavior. The \α\β-frame is an intermediate solution in terms of computational cost.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8889768,

title = {Hybrid Distributed and Decentralized Secondary Control Strategy to Attain Accurate Power Sharing and Improved Voltage Restoration in DC Microgrids},

author = {W W A G da Silva and T R Oliveira and P F Donoso-Garcia},

url = {https://ieeexplore.ieee.org/abstract/document/8889768},

doi = {10.1109/TPEL.2019.2951012},

issn = {1941-0107},

year  = {2020},

date = {2020-06-01},

journal = {IEEE Transactions on Power Electronics},

volume = {35},

number = {6},

pages = {6458-6469},

abstract = {This article proposes a secondary level control technique for dc microgrids, which achieves accurate power sharing through a distributed strategy while performing dc bus voltage restoration in a decentralized fashion. In order to attain proper power sharing, each power converter exchanges its output power information with neighboring converters through a low-bandwidth network at defined time intervals. A consensus-based algorithm is employed to process this information and modify the converter's droop coefficient, compensating droop mismatches and cable resistances and enabling power sharing. Restoration of the average dc bus voltage is realized locally with each converter compensating its own output voltage drop through an integrator. A comprehensive design procedure and performance and stability analysis, including communication loss and substantial time delays, are also provided. The strategy has shown to be robust to some communication failure scenarios and moderate communication delays. The proposed method is evaluated through simulation in the software PLECS and it is experimentally validated in a 4.5-kW dc microgrid setup.

},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Souza2020,

title = {Minimum voltage control for reliability improvement in modular multilevel cascade converters-based STATCOM},

author = {R O Souza and A F Cupertino and L M F Morais and H A Pereira },

doi = {https://doi.org/10.1016/j.microrel.2020.113693},

year  = {2020},

date = {2020-06-01},

journal = {MICROELECTRONICS RELIABILITY},

volume = {110},

pages = {113693},

abstract = {This work proposes an adaptive dc-link voltage strategy applied to a double-star chopper cell-based static synchronous compensator (DSCC-STATCOM). The proposed technique aims to improve the converter reliability by controlling the cell reference voltage according to the minimum voltage required in each STATCOM operation condition. It is important to remark that the proposed strategy does not require any hardware modification. The technique is evaluated in terms of dynamics and reliability. For this purpose, two modulation strategies were analyzed: phase-shifted pulse-width modulation (PS-PWM) and nearest-level control with cell tolerance band algorithm (NLC-CTB). The results show that the proposed technique can reduce the switching losses and increase the system reliability. For the evaluated case study, the DSCC-STATCOM B1 lifetime increases 16% and 23% for PS-PWM and NLC-CTB, respectively, when the minimum voltage control strategy is employed.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Cougo2020,

title = {Influence of PWM Methods on Semiconductor Losses and Thermal Cycling of 15-kVA Three-Phase SiC Inverter for Aircraft Applications},

author = {B Cougo and L M F Morais and G Segond and R Riva and H T Duc},

doi = {10.3390/electronics9040620},

year  = {2020},

date = {2020-04-07},

journal = {Electronics},

volume = {9},

number = {4},

pages = {620},

abstract = {This paper presents the influence of different pulse width modulation (PWM) methods on losses and thermal stresses in SiC power modules used in a three-phase inverter. The variation of PWM methods directly impacts instantaneous losses on these semiconductors, consequently resulting in junction temperature swing at the fundamental frequency of the converter’s output current. This thermal cycling can significantly reduce the lifetime of these components. In order to determine semiconductor losses, one needs to characterize SiC devices to calculate the instantaneous power. The characterization methodology of the devices, the calculation of instantaneous power and temperature of SiC dies, and the influence of the different PWM methods are presented. A 15-kVA inverter is built in order to obtain experimental results to confirm the characterization and loss calculation, and we show the best PWM methods to increase efficiency and reliability of the three-phase inverter for specific aircraft applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8962244,

title = {High Performance Simulation Models for ES-STATCOM Based on Modular Multilevel Converters},

author = {A F Cupertino and W C S Amorim and H A Pereira and S I Seleme Junior and S K Chaudhary and R Teodorescu},

doi = {http://dx.doi.org/10.1109/TEC.2020.2967314},

year  = {2020},

date = {2020-01-01},

journal = {IEEE Transactions on Energy Conversion},

volume = {35},

number = {1},

pages = {474-483},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8957488,

title = {Simple and Effective Digital Control of a Variable-Speed Low Inductance BLDC Motor Drive},

author = {R L Valle and P M Almeida and G A Fogli and A A Ferreira and P G Barbosa},

doi = {10.1109/ACCESS.2020.2966437},

issn = {2169-3536},

year  = {2020},

date = {2020-01-01},

journal = {IEEE Access},

volume = {8},

pages = {13240-13250},

abstract = {This paper presents a simple digital control applied to a low inductance 5 kW/48 V three-phase brushless DC motor. Controlling the VSI as a full-bridge converter allowed the use of unipolar switching strategy, increasing the output equivalent frequency up to 100 kHz. The aforementioned strategy has made it possible to control the three-phase currents using a single deadbeat controller without a back-EMF feed-forward compensation. Stability analysis is performed to show that the proposed current control presents good transient response under reasonable parametric variations, as well as zero steady-state error. Precise regulation with no overshoot was obtained using an IP controller to regulate the motor speed. Experimental results are presented to validate the theoretical analysis and to compare with a conventional PI compensator and a predictive controller.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{electronics9040620,

title = {Influence of PWM Methods on Semiconductor Losses and Thermal Cycling of 15-kVA Three-Phase SiC Inverter for Aircraft Applications},

author = {Bernardo Cougo and Lenin M. F. Morais and Gilles Segond and Raphael Riva and Hoan Tran Duc},

url = {https://www.mdpi.com/2079-9292/9/4/620},

doi = {10.3390/electronics9040620},

issn = {2079-9292},

year  = {2020},

date = {2020-01-01},

journal = {Electronics},

volume = {9},

number = {4},

abstract = {This paper presents the influence of different pulse width modulation (PWM) methods on losses and thermal stresses in SiC power modules used in a three-phase inverter. The variation of PWM methods directly impacts instantaneous losses on these semiconductors, consequently resulting in junction temperature swing at the fundamental frequency of the converter’s output current. This thermal cycling can significantly reduce the lifetime of these components. In order to determine semiconductor losses, one needs to characterize SiC devices to calculate the instantaneous power. The characterization methodology of the devices, the calculation of instantaneous power and temperature of SiC dies, and the influence of the different PWM methods are presented. A 15-kVA inverter is built in order to obtain experimental results to confirm the characterization and loss calculation, and we show the best PWM methods to increase efficiency and reliability of the three-phase inverter for specific aircraft applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fortes2019,

title = {Solu\c{c}\~{a}o Integrada para o Disparo de IGBTs Conectados em S\'{e}rie Baseada no Comando T\'{i}pico de Tiristores},

author = {Gustavo Oliveira Fortes and Marcos Ant\^{o}nio Severo Mendes and Porf\'{i}rio Cabalero Cortizo},

doi = {10.18618/REP.2019.4.0033},

year  = {2019},

date = {2019-12-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {24},

number = {4},

pages = {423-433},

abstract = {A utiliza\c{c}\~{a}o de IGBTs conectados em s\'{e}rie ainda \'{e} um tema atual na literatura, a despeito de sua discuss\~{a}o ter se iniciado na d\'{e}cada de 90. \'{E} intrigante que, apesar dos in\'{u}meros estudos acad\^{e}micos, atualmente n\~{a}o existam produtos comerciais dispon\'{i}veis dentro do mercado de inversores de m\'{e}dia tens\~{a}o (at\'{e} 4,16kV) e menor pot\^{e}ncia (at\'{e} 1MW), utilizando essa tecnologia. Esse fato est\'{a} relacionado com a dificuldade de garantir o compartilhamento din\^{a}mico e est\'{a}tico de tens\~{a}o entre IGBTs, originando circuitos de disparo complexos e com custo relativo elevado, se comparado com os componentes que esses pretendem comandar. Dessa forma, o presente artigo visa apresentar uma alternativa simples e de baixo custo, entretanto, efetiva para o disparo de IGBTs de baixa tens\~{a}o associados em s\'{e}rie, especificamente para o modelo de encapsulamento TO-247. S\~{a}o apresentados resultados experimentais mostrando os comportamentos da solu\c{c}\~{a}o em v\'{a}rias condi\c{c}\~{o}es operacionais.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Farias2019,

title = {Redundancy design for modular multilevel converter based STATCOMs},

author = {Jo\~{a}o Victor M. Farias and Allan F. Cupertino and Victor Nazareth {Ferreira} and Heverton A Pereira and Seleme Isaac {Seleme Jr}},

doi = {10.1016/j.microrel.2019.113471},

year  = {2019},

date = {2019-09-01},

journal = {Microelectronics Reliability},

volume = {100-101},

abstract = {Many strategies have been proposed to improve the reliability of Modular Multilevel Converters (MMCs). However, the redundancy factor selection to support a converter fault tolerance operation is an important field to be explored. This work proposes a combined reliability model for the correct selection of the additional number of cells to achieve a target lifetime. This model combines both wear-out and random failures data and compute the required redundancy factor for a given reliability target. The proposed model is evaluated through a reliability-oriented case study, whereas four device voltage classes in a 13.8 kV/17 MVA MMC STATCOM are considered.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Cupertino2019,

title = {Impact of the mission profile length on lifetime prediction of PV inverters},

author = {Allan F Cupertino and Jo\~{a}o M. Lenz and Erick M. S. Brito and Heverton A. Pereira and Jos\'{e} R. Pinheiro and Seleme I. {Seleme Jr.}},

doi = {10.1016/j.microrel.2019.113427},

year  = {2019},

date = {2019-09-01},

journal = {Microelectronics Reliability},

volume = {100-101},

abstract = {The first step of the design for reliability (DFR) approach in PV inverters is the translation of the mission profile into thermal loading. Most works employ only a one-year mission profile even though it is known that it changes year to year due to climatic reasons and randomness of cloud behavior. This work evaluates how mission profile length affects the system-level reliability of a 5.5 kW PV inverter. Different mission profile lengths (1\textendash5 years) are compared to the typical average year (TAY) mission profile. The results indicate that the use of 1 year mission profile affects by 7% the estimated inverter B10 lifetime.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fogli2019,

title = {A simple dead-time compensation strategy for grid-connected voltage-sourced converters semiconductor switches},

author = {Gabriel A. Fogli and Rodolfo L. Valle and Pedro M. Almeida and Pedro G. Barbosa},

doi = {10.1016/j.epsr.2019.04.031},

year  = {2019},

date = {2019-09-01},

journal = {Electric Power Systems Research},

volume = {174},

abstract = {This paper presents a simple strategy to compensate the distorted currents synthesized by a grid-connected voltage source converter due to dead-time, turn-on and turn-off time delays of the semiconductor switches. The algorithm consider only the polarity of the fundamental component of the currents flowing through the converter terminals and the values of the time delays and voltage drops supplied by the manufacturers to the semiconductors devices. The presented compensation belongs to the group classified as average value compensation technique methodology since it does not change the pulse pattern of the converter's semiconductor switches. A simplified mathematical description of the effects caused by these unwanted time delays is presented and used to derive a correction factor to be added, in real time, to the converter output controller in order to compensate for its terminal voltages. The asymptotic stability and robustness of the proposed methodology is investigated redrawing the converter current controllers, designed in dq-reference frame, as proportional-resonant ones, in the abc coordinates, and adding the effect of the compensating signal in the feedback loop using the concept of describing function. In addition, the minimum value of the DC bus voltage necessary is also evaluated to ensure the operation of the converter in the linear modulation region when the compensation algorithm is active. Experimental results are presented to validate the theoretical analysis and to demonstrate the effectiveness of the proposed strategy for three different operation conditions of a grid-connected converter: (i) active power injection; (ii) active power consumption and (iii) reactive power support.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fortes2019b,

title = {Integrated Solution for Driving Series-Connected IGBTs and Its Natural Intrinsic Balancing},

author = {Gustavo O. Fortes and Marcos A. S. Mendes and Porf\'{i}rio C. Cortizo},

doi = {10.3390/en12122406},

year  = {2019},

date = {2019-06-22},

journal = {Energies},

volume = {12},

number = {12},

pages = {2406},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8604096,

title = {PLL-Based Feed-Forward Control to Attenuate Low-Frequency Common-Mode Voltages in Transformerless LVDC Systems},

author = {T R Oliveira and W W A G Silva and S I Seleme and P F Donoso-Garcia},

url = {https://ieeexplore.ieee.org/document/8604096},

doi = {10.1109/TIA.2019.2891435},

issn = {1939-9367},

year  = {2019},

date = {2019-05-01},

journal = {IEEE Transactions on Industry Applications},

volume = {55},

number = {3},

pages = {3151-3159},

abstract = {Low-voltage dc distribution systems have gained significant attention over the last years, since they provide simpler and more efficient integration of distributed generators and storage devices, establishing a pathway to net zero energy buildings. In low-power units, transformerless utility interface is preferred to reduce footprint and losses. However, the lack of galvanic isolation introduces a common-mode (CM) path between the dc distribution bus and the utility service grounding, leading to the presence of high CM voltages at the dc bus feeders. The attenuation of the CM voltage reduces the touch voltage amplitude and leakage current, contributing to a safer environment. In this paper, a feed-forward active compensation of the CM voltage is proposed. It relies on utility voltage parameters, estimated by a phase locked loop, to generate a counter CM voltage; hence, it does not require previous knowledge of the system CM path model or the addition of voltage sensors. Experimental results show that this technique can attenuate the CM voltage to non-dangerous magnitudes without interfering with the microgrid differential mode behavior.

},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Matos2019,

title = {A generalized open-end winding conversion system using flying capacitor cells},

author = {F F V Matos and M A S Mendes and T Meynard and V F Mendes},

doi = {10.1016/j.epsr.2018.12.024},

year  = {2019},

date = {2019-04-01},

journal = {Electric Power Systems Research},

volume = {169},

pages = {174-183},

abstract = {Over the years, industrial processes, renewable energy systems and electrification of transport systems have been pushing power electronics equipment towards higher power ratings, quality and faster dynamics. In this context, several multilevel converter structures were developed and became popular, such as neutral-point-clamped, flying capacitor and cascaded half-bridge. This paper presents a generalized n-level converter using the multicell flying capacitor structure in an open-end winding configuration. A mathematical analysis shows that the proposed system presents the same output voltages as a traditional Δ/Y structure, but with less energy storage in the flying capacitors. The correlation with the traditional structure allows the use of an optimized modulation technique developed for the flying capacitor converter. It results in a voltage output with optimized harmonics, keeps the losses evenly distributed among the switching devices, and balances the voltages in the flying capacitors. Experimental results from a three-level conversion system and simulation results from a five-level structure demonstrate the features of the proposed topology.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{chg2,

title = {A Comparative Analysis of Voltage Equalizers for Partial Shading Compensation in PV Arrays},

author = {C H G Santos and P F Donoso-Garcia and S I Seleme},

url = {https://sobraep.org.br/site/uploads/2019/09/rvol24no03-11-0012-323-335.pdf},

doi = {10.18618/REP.2019.3.0012},

year  = {2019},

date = {2019-01-01},

journal = {Eletr\^{o}nica de Pot\^{e}ncia (Impresso)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8687998,

title = {Modular control with carrier auto-interleaving and capacitor-voltage balancing for MMCs},

author = {S I Seleme and L Gr\'{e}goire and M Cousineau and P Ladoux},

doi = {http://dx.doi.org/10.1049/iet-pel.2018.5096},

year  = {2019},

date = {2019-01-01},

journal = {IET Power Electronics},

volume = {12},

number = {4},

pages = {817-828},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8306141,

title = {Comparison of DSCC and SDBC Modular Multilevel Converters for STATCOM Application During Negative Sequence Compensation},

author = {A F Cupertino and J V M Farias and H A Pereira and S I Seleme and R Teodorescu},

doi = {http://dx.doi.org/10.1109/TIE.2018.2811361},

year  = {2019},

date = {2019-01-01},

journal = {IEEE Transactions on Industrial Electronics},

volume = {66},

number = {3},

pages = {2302-2312},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{elect_wendell,

title = {Design of an Highly Efficient AC-DC-AC Three-Phase Converter Using SiC for UPS Applications},

author = {W C Alves and L M F Morais and P C Cortizo},

doi = {10.3390/electronics7120425},

year  = {2018},

date = {2018-12-11},

journal = {Electronics},

volume = {7},

number = {12},

pages = {425},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{elect_arthur,

title = {SHIL and DHIL Simulations of Nonlinear Control Methods Applied for Power Converters Using Embedded Systems},

author = {A H R Rosa and M B E Silva and M F C Campos and R A S Santana and W A Rodrigues and L M F Morais and S I Seleme},

doi = {10.3390/electronics7100241},

year  = {2018},

date = {2018-10-06},

journal = {Electronics},

volume = {7},

number = {10},

pages = {241},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{energie_welbert,

title = {Voltage and Power Balance Strategy without Communication for a Modular Solid State Transformer Based on Adaptive Droop Control},

author = {W A Rodrigues and T R Oliveira and L M F Morais and A H R Rosa},

doi = {https://doi.org/10.3390/en11071802},

issn = {1996-1073},

year  = {2018},

date = {2018-07-10},

journal = {Energies},

volume = {11},

number = {7},

pages = {1802-1822},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{polz,

title = {Practical hybrid solutions based on nonlinear controllers applied to PFC boost converter},

author = {A H R Rosa and L M F Morais and S I Seleme},

doi = {10.15199/48.2018.06.02},

issn = {0033-2097},

year  = {2018},

date = {2018-06-02},

journal = {PRZEGLAD ELEKTROTECHNICZNY},

volume = {1},

pages = {10-16},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{energie_arthur,

title = {Adaptive and Nonlinear Control Techniques Applied to SEPIC Converter in DC-DC, PFC, CCM and DCM Modes Using HIL Simulation},

author = {A H R Rosa and T M Souza and L M F Morais and S I Seleme},

doi = {https://doi.org/10.3390/en11030602},

issn = {1996-1073},

year  = {2018},

date = {2018-03-09},

journal = {Energies},

volume = {11},

number = {3},

pages = {602},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pedro_sobraep,

title = {Ensino Orientado ao Projeto: Uma Experi\^{e}ncia para o Ensino de Eletr\^{o}nica nas Disciplinas de Laborat\'{o}rio de Eletr\^{o}nica e Eletr\^{o}nica de Pot\^{e}ncia},

author = {P F Donoso-Garcia and P C Cortizo and L M F Morais},

doi = {10.18618/REP.2008.2.109116},

year  = {2018},

date = {2018-03-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {13},

pages = {109-116},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Duarte2018,

title = {Estrat\'{e}gias de energiza\c{c}\~{a}o e desenergiza\c{c}\~{a}o de um compensador est\'{a}tico s\'{i}ncrono para distribui\c{c}\~{a}o},

author = {Samuel Neves Duarte and Gabriel Azevedo Fogli and Pedro Machado Almeida and Pedro Gomes Barbosa},

doi = {10.18618/REP.2018.1.2717},

year  = {2018},

date = {2018-03-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {23},

number = {1},

pages = {29-38},

abstract = {Este trabalho prop\~{o}e dois controladores para energizar e desenergizar compensadores est\'{a}ticos s\'{i}ncronos destinados a serem conectados nas redes de distribui\c{c}\~{a}o. O primeiro circuito \'{e} baseado em um retificador semi\textendashcontrolado enquanto o segundo controlador \'{e} baseado em um circuito gradador. Os dois controladores propostos s\~{a}o facilmente adaptados a estrutura do compensador est\'{a}tico sem a necessidade de realizar altera\c{c}\~{o}es topol\'{o}gicas no conversor. Um modelo matem\'{a}tico \'{e} usado para derivar as rela\c{c}\~{o}es matem\'{a}ticas usadas para controlar as correntes de energiza\c{c}\~{a}o e de desenergiza\c{c}\~{a}o. Aproxima\c{c}\~{o}es lineares por partes foram usadas para reduzir o esfor\c{c}o computacional dos algoritmos de controle desenvolvidos. Resultados de simula\c{c}\~{a}o e experimentais s\~{a}o apresentados para validar a metodologia proposta.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{8344431,

title = {Design and Selection of High Reliability Converters for Mission Critical Industrial Applications: A Rolling Mill Case Study},

author = {V de Nazareth Ferreira and A Fagner Cupertino and H Augusto Pereira and A Vagner Rocha and S Isaac Seleme and B de Jesus Cardoso Filho},

doi = {http://dx.doi.org/10.1109/tia.2018.2829104},

year  = {2018},

date = {2018-01-01},

journal = {IEEE Transactions on Industry Applications},

volume = {54},

number = {5},

pages = {4938-4947},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{7944644,

title = {On the Redundancy Strategies of Modular Multilevel Converters},

author = {J V M Farias and A F Cupertino and H A Pereira and S I Seleme and R Teodorescu},

doi = {http://dx.doi.org/10.1109/TPWRD.2017.2713394},

year  = {2018},

date = {2018-01-01},

journal = {IEEE Transactions on Power Delivery},

volume = {33},

number = {2},

pages = {851-860},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{7423808,

title = {Distributed Secondary Level Control for Energy Storage Management in DC Microgrids},

author = {T R Oliveira and W W A Gon\c{c}alves Silva and P F Donoso-Garcia},

doi = {10.1109/TSG.2016.2531503},

issn = {1949-3061},

year  = {2017},

date = {2017-11-01},

journal = {IEEE Transactions on Smart Grid},

volume = {8},

number = {6},

pages = {2597-2607},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fogli2017,

title = {Modelling and control of an interface power converter for the operation of small diesel gen-sets in grid-connected and stand-alone modes},

author = {G A Fogli and P M Almeida and Pedro G. Barbosa},

doi = {10.1016/j.epsr.2017.05.016},

year  = {2017},

date = {2017-09-01},

journal = {Electric Power Systems Research},

volume = {150},

pages = {177-187},

abstract = {This paper presents the modelling and control design steps of a two-stage static conversion structure used as interface to integrate a diesel generator set into a secondary distribution network. In order to guarantee that the inverter works within the PWM linear range, a boost converter is used to increase the DC voltage level. The proposed structure allows two operation modes, connected to the AC mains or isolated. In the isolated mode the interface converter may be controlled as grid-forming or grid-conditioning (active power filter). The inverter current controllers are designed in the synchronous reference frame together with multiple integrators in order to effectively track non-sinusoidal currents. The stability analysis is performed through the Nyquist plot. Experimental results obtained with a 5.5 kW diesel generator set are presented to validate the proposed system operation and control strategies.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{selemespringer,

title = {DSCC-MMC STATCOM Main Circuit Parameters Design Considering Positive and Negative Sequence Compensation},

author = {A F Cupertino and J V M Farias and H A Pereira and S I Seleme and R Teodorescu},

doi = {https://doi.org/10.1007/s40313-017-0349-4},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Control, Automation and Electrical Systems},

volume = {29},

pages = {62-74},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{elsevier_julio,

title = {Digital control strategy for a buck converter operating as a battery charger for stand-alone photovoltaic systems},

author = {J I Lopez-Seguel and S I Seleme and P F Donoso-Garcia and L M F Morais and P C Cortizo and M A S Mendes},

doi = {10.1016/j.solener.2016.11.005},

year  = {2016},

date = {2016-11-11},

journal = {Solar Energy},

volume = {140},

pages = {171-187},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gr\'{e}goire2016,

title = {Real-Time Simulation of Interleaved Converters with Decentralized Control },

author = {L.-A. Gr\'{e}goire and M Cousineau and S I Seleme Jr and P Ladoux},

url = {http://www.icrepq.com/icrepq'16/287-16-gregoire.pdf},

issn = {2172-038 X},

year  = {2016},

date = {2016-05-01},

journal = {Renewable energy and Power Quality Journal},

number = {14},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{g2016intelligibility,

title = {Intelligibility in Low-Cost Automotive Audio Systems},

author = {Christian Herrera Gon\c{c}alves and Pedro F Donoso-Garcia and Eduardo B Medeiros},

url = {http://www.aes.org/e-lib/browse.cfm?elib=18137},

year  = {2016},

date = {2016-01-01},

journal = {J. Audio Eng. Soc},

volume = {64},

number = {5},

pages = {320-331},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Souza2015,

title = {Prote\c{c}\~{a}o direta de sobrecorrente no controle de uma microrrede trif\'{a}sica},

author = {W F Souza and M A S Mendes and L A C Lopes},

doi = {10.18618/REP.2015.2.185194},

year  = {2015},

date = {2015-05-02},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {22},

number = {2},

pages = {185-194},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{RitwikChattopadhyay2015,

title = {Low-Voltage PV Power Integration into Medium Voltage Grid Using High-Voltage SiC Devices},

author = {Ritwik Chattopadhyay and Subhashish Bhattacharya and Nicole C Foureaux and Igor A Pires and Helder de Paula and Lenin Martins Ferreira Morais and Porf\'{i}rio C Cortizio and Sidelmo M Silva and Braz de Jesus Cardoso {Filho} and Jos\'{e} A S de Brito},

doi = {10.1541/ieejjia.4.767},

year  = {2015},

date = {2015-01-01},

journal = {IEEJ Journal of Industry Applications},

volume = {4},

number = {6},

pages = {767-775},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{chg1,

title = {Cascaded cell string current diverter for improvement of photovoltaic solar array under partial shading problems},

author = {C H G Santos and P F Donoso-Garcia and S I Seleme and A P Magalh\~{a}es},

url = {http://sobraep1.tempsite.ws/site/uploads/2018/06/rvol20no3p15.pdf},

doi = {10.18618/REP.2015.3.2542},

year  = {2015},

date = {2015-01-01},

journal = {Eletr\^{o}nica de Pot\^{e}ncia (Impresso)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{7209067,

title = {Power sharing control strategies for a three-phase microgrid in different operating condition with droop control and damping factor investigation},

author = {W F Souza and M A S Mendes and L A C Lopes},

doi = {10.1049/iet-rpg.2014.0250},

issn = {1752-1424},

year  = {2015},

date = {2015-01-01},

journal = {IET Renewable Power Generation},

volume = {9},

number = {7},

pages = {831-839},

abstract = {In this study, a microgrid with two voltage source inverters (VSIs), operating in islanded or grid-connected mode is analysed. The active power control by droop coefficients and reference frequencies is demonstrated. In addition, the inductive and resistive droop strategies are compared by considering the complex line impedance. By measuring the line impedance in the prototype, it was found that, even for the low-voltage microgrid, the line impedance was not predominantly resistive, but complex. For this line impedance condition, an investigation to determine the best droop control law considering the partial derivatives. Observing the partial derivatives and the experimental results obtained it is demonstrated that inductive droop control is better to control the active power for complex line impedance. For a scenario with resistive unbalanced loads and different power sharing between the inverters, the proposed control, implemented in the a-b-c reference frame, was validated. A novel absolute damping factor is developed to improve the transient response and reduce the reactive power flow. The VSIs are connected to the grid without transformers to reduce the connection costs. Simulation and experimental results are presented to confirm the improvements achieved using the implemented control method.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{arthur_elsevier,

title = {Stability in passivity-based boost converter controller for power factor correction},

author = {S I Seleme and L M F Morais and A H R Rosa and L A B Torres},

doi = {10.1016/j.ejcon.2012.03.001},

year  = {2013},

date = {2013-03-21},

journal = {European Journal of Control},

volume = {19},

number = {1},

pages = {56-64},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{lenin_sobraep,

title = {Harmonics injection in HPS electronic ballast with modulation index control},

author = {L M F Morais and P F Donoso-Garcia and S I Seleme and P C Cortizo},

doi = {10.18618/REP.2013.1.815822},

year  = {2013},

date = {2013-02-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {18},

number = {1},

pages = {815-822},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{6545193,

title = {Simple control technique for interleaved inverters with magnetically coupled legs},

author = {S. A. D. {Contreras} and P C Cortizo and M. A. S. {Mendes}},

doi = {10.1049/iet-pel.2012.0514},

issn = {1755-4535},

year  = {2013},

date = {2013-02-01},

journal = {IET Power Electronics},

volume = {6},

number = {2},

pages = {353-363},

abstract = {Recent works of different authors have shown that the use of intercell transformers in interleaved inverters bring many improvements to this kind of parallelism. However, even though a balanced current distribution is necessary and not guaranteed by the converter itself; just a few of those studies are focused on the modelling and control of the inverter. Moreover, the fact that the paralleled modules are coupled and that the control signals are not updated simultaneously have not been considered yet. In this way, the current paper takes those facts into account and proposes a simple procedure for modelling and control a single-phase interleaved inverter. A mathematical analysis, some simulation and experimental results are shown in order to prove the simplicity and effectiveness of the proposed procedure.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{LOPEZSEGUEL2013,

title = {Methodology for the design of a stand-alone photovoltaic power supply},

author = {Julio Lopez-Seguel and Seleme Isaac {Seleme Jr} and Pedro F Donoso-Garcia and Lenin Martins Ferreira Morais and Porfirio Cabaleiro Cortizo and Marcos A S Mendes},

url = {https://scielo.conicyt.cl/scielo.php?script=sci_arttext\&pid=S0718-33052013000300008\&nrm=iso},

doi = {10.4067/S0718-33052013000300008},

issn = {0718-3305},

year  = {2013},

date = {2013-01-01},

journal = {Ingeniare. Revista chilena de ingenier\'{i}a},

volume = {21},

pages = {380 - 393},

publisher = {scielocl},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{6401228,

title = {Evaluation of adaptive passivity-based controller for power factor correction using a boost converter},

author = {S I Seleme and A H R Rosa and L M F Morais and P F Donoso-Garcia and P C Cortizo},

doi = {10.1049/iet-cta.2011.0218},

issn = {1751-8652},

year  = {2012},

date = {2012-09-01},

journal = {IET Control Theory Applications},

volume = {6},

number = {14},

pages = {2168-2178},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Correa2012,

title = {Efficiency optimization in stand-alone photovoltaic pumping system},

author = {T P Correa and S I Seleme Jr and S R Silva},

doi = {10.1016/j.renene.2011.10.024},

year  = {2012},

date = {2012-05-01},

journal = {Renewable Energy},

volume = {41},

pages = {220-226},

abstract = {Solar photovoltaic energy is a very promising and important sustainable global energy source. Despite its many advantages, it is still an expensive alternative, which explains the fact that it has not yet became commercially popular. Studies already show that the investments in such systems are paid back. The aim of this work is to extend and validate an alternative to reduce the payback time of photovoltaic stand-alone pumping systems, which optimizes not only the efficiency of the photovoltaic conversion, using a maximum power point tracking algorithm, but also, the losses in the induction motor. A prototype has been developed and experimental results are shown with the optimizing strategies operating simultaneously.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Seleme2011,

title = {Discussion on: “Analytical Solution of Optimized Energy Consumption of Induction Motor Operating in Transient Regime”},

author = {S I {Seleme Jr}},

doi = {10.1016/S0947-3580(11)70607-0},

year  = {2011},

date = {2011-06-01},

journal = {European Journal of Control},

volume = {17},

number = {4},

pages = {412-413},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{\'{A}vila2011,

title = {Um Novo M\'{e}todo de Modula\c{c}\~{a}o para Conversores Multin\'{i}veis com Redu\c{c}\~{a}o das Perdas por Comuta\c{c}\~{a}o e Thd},

author = {D M A \'{A}vila and M A S Mendes and P C Cortizo},

doi = {10.18618/REP.2011.2.118129},

year  = {2011},

date = {2011-05-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {16},

number = {2},

pages = {118-129},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pd1,

title = {Metodologia de ensino orientada para projetos e cria\c{c}\~{a}o de material did\'{a}tico},

author = {P F Donoso-Garcia and R O Duarte},

doi = {10.35699/2237-5864.2011.2024},

year  = {2011},

date = {2011-01-01},

journal = {Revista Brasileira de Doc\^{e}ncia, Ensino e Pesquisa em Administra\c{c}?o},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{lenin_sobraep2,

title = {Controle Adaptativo Baseado Em Passividade Aplicado A Conversores Est\'{a}ticos Operando Como Corretores De Fator De Pot\^{e}ncia},

author = {E A Oliveira and L M F Morais and S I Seleme and P F Donoso-Garcia and P C Cortizo and M A S Mendes},

doi = {10.18618/REP.2009.2.107116},

year  = {2009},

date = {2009-03-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {14},

number = {2},

pages = {107-116},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{4497881,

title = {Comparison of Three Single-Phase PLL Algorithms for UPS Applications},

author = {R M {Santos Filho} and P F Seixas and P C Cortizo and L A B Torres and A F Souza},

doi = {10.1109/TIE.2008.924205},

issn = {1557-9948},

year  = {2008},

date = {2008-08-01},

journal = {IEEE Transactions on Industrial Electronics},

volume = {55},

number = {8},

pages = {2923-2932},

abstract = {In this paper, the performance assessment of three software single-phase phase-locked loop (PLL) algorithms is carried out by means of dynamic analysis and experimental results. Several line disturbances such as phase-angle jump, voltage sag, frequency step, and harmonics are generated by a DSP together with a D/A converter and applied to each PLL. The actual minus the estimated phase-angle values are displayed, providing a refined method for performance evaluation and comparison. Guidelines for parameters adjustments are also presented. In addition, practical implementation issues such as computational delay effects, ride-through, and computational load are addressed. The developed models proved to accurately represent the PLLs under real test conditions.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{4475780,

title = {Forced oscillation in LC circuit used for the ignition of discharge lamps},

author = {L M F Morais and P F Donoso-Garcia and S I Seleme and P C Cortizo},

doi = {10.1049/iet-pel:20060465},

issn = {1755-4535},

year  = {2008},

date = {2008-03-01},

journal = {IET Power Electronics},

volume = {1},

number = {1},

pages = {93-99},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{lenin_sobraep3,

title = {Reator Eletr\^{o}nico Para L\^{a}mpada De Vapor De S\'{o}dio De Alta Press\~{a}o Com Alto Fator De Pot\^{e}ncia Utilizando Formas De Onda De Tens\~{a}o Sintetizadas Via Pwm},

author = {L M F Morais and P F Donoso-Garcia and S I Seleme and P C Cortizo and M A S Mendes},

doi = {10.18618/REP.2008.1.015023},

year  = {2008},

date = {2008-03-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {13},

pages = {15-23},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{F\'{e}lix2007,

title = {Digital Control of a Three-Phase UPS},

author = {C H F F\'{e}lix and P F Seixas and P C Cortizo},

doi = {10.18618/REP.2007.3.189196},

year  = {2007},

date = {2007-11-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {12},

number = {3},

pages = {189-196},

abstract = {This paper presents a design methodology for the digital controllers of a three-phase UPS (Uninterruptible Power Supply). Upon a state-feedback control topology, a systematic method for pole placement and determination of controller gains was developed. In order to attest the efficiency of the adopted control scheme, experimental tests were carried out on a 4kVA three-phase on-line UPS, resulting in unity power factor operation of the controlled rectifier and low harmonic distortion of inverter output voltage, even under heavy non-linear loads.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Seixas2007,

title = {Modula\c{c}\~{a}o em Largura de Pulsos para Conversor CA-CA a Tr\^{e}s Bra\c{c}os},

author = {P F Seixas and P C Cortizo and L Oliveira},

doi = {10.18618/REP.2007.3.173180},

year  = {2007},

date = {2007-11-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {12},

number = {3},

pages = {173-180},

abstract = {Este trabalho apresenta uma nova abordagem da modula\c{c}\~{a}o em largura de pulsos para um conversor est\'{a}tico ca-ca a tr\^{e}s bra\c{c}os, utilizado em sistemas de energia ininterrupta (SEI), monof\'{a}sico, on-line. Tr\^{e}s modos de opera\c{c}\~{a}o s\~{a}o apresentados: o modo ass\'{i}ncrono, com regula\c{c}\~{a}o de frequ\^{e}ncia de sa\'{i}da, e duas variantes do modo s\'{i}ncrono, ambas permitindo a redu\c{c}\~{a}o de tens\~{a}o no barramento cc.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Nieda2007,

title = {On-line neural training algorithm with sliding mode control and adaptive learning rate},

author = {A Nieda and S I Seleme Jr and G G Parma and B R Menezes},

doi = {10.1016/j.neucom.2006.07.019},

year  = {2007},

date = {2007-10-01},

journal = {Neurocomputing},

volume = {70},

number = {16-18},

pages = {2687-2691},

abstract = {This paper presents a new algorithm for on-line artificial neural networks (ANN) training. The network topology is a standard multilayer perceptron (MLP) and the training algorithm is based on the theory of variable structure systems (VSS) and sliding mode control (SMC). The main feature of this novel procedure is the adaptability of the gain (learning rate), which is obtained from sliding mode surface so that system stability is guaranteed.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Souza2007,

title = {Pwm Vetorial Para Inversor Trif\'{a}sico De Quatro-bra\c{c}os},

author = {W. F. Souza and M A S Mendes and P F Seixas},

doi = {10.18618/REP.2007.2.089096},

year  = {2007},

date = {2007-07-01},

journal = {ELETR\^{O}NICA DE POT\^{E}NCIA (Impresso)},

volume = {12},

number = {2},

pages = {89-96},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{4182473,

title = {Acoustic Resonance Avoidance in High Pressure Sodium Lamps Via Third Harmonic Injection in a PWM Inverter-Based Electronic Ballast},

author = {L M F Morais and P F Donoso-Garcia and S I Seleme and P C Cortizo},

doi = {10.1109/TPEL.2007.896993},

issn = {1941-0107},

year  = {2007},

date = {2007-05-01},

journal = {IEEE Transactions on Power Electronics},

volume = {22},

number = {3},

pages = {912-918},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{sergio1,

title = {A Line-Interactive UPS System Implementation with Series-Parallel Active Power -Line Conditioning for Three-Phase, Four-Wire Systems},

author = {S A O Silva and P F Donoso-Garcia and P C Cortizo},

doi = {10.1590/S0103-17592005000200008 },

year  = {2005},

date = {2005-01-01},

journal = {Controle \& Automa\c{c}\~{a}o (Impresso) - Unicamp},

volume = {16},

number = {2},

pages = {200-210},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{sergio2,

title = {Analysis of a Three-Phase Line-interactive UPS System with Active Power-line Conditioning},

author = {S A O Silva and P F Donoso-Garcia and P C Cortizo and P F Seixas},

year  = {2005},

date = {2005-01-01},

journal = {UNOPAR Cient\'{i}fica. Ci\^{e}ncias Exatas e Tecnol\'{o}gicas},

volume = {4},

pages = {4-16},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{sergio3,

title = {A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems},

author = {S A O Silva and P F Donoso-Garcia and P C Cortizo and P F Seixas},

doi = {10.1016/j.ijepes.2003.11.008},

year  = {2004},

date = {2004-06-01},

journal = {International Journal of Electrical Power \& Energy Systems},

volume = {26},

number = {6},

pages = {399-411},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Pujatti2004,

title = {Implementation and Tests of a Variable Control System of Spark Time Ignition, using Digital Signal Processor - DSP},

author = {Fabricio Pujatti and Marcos A S Mendes and Tulio C O Carvalho},

doi = {10.4271/2004-01-3441},

year  = {2004},

date = {2004-01-01},

journal = {SAE Technical Papers},

volume = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{1058113,

title = {A three-phase line-interactive UPS system implementation with series-parallel active power-line conditioning capabilities},

author = {S A O da Silva and P F Donoso-Garcia and P C Cortizo and P F Seixas},

doi = {10.1109/TIA.2002.804760},

issn = {1939-9367},

year  = {2002},

date = {2002-11-01},

journal = {IEEE Transactions on Industry Applications},

volume = {38},

number = {6},

pages = {1581-1590},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pd2,

title = {An\'{a}lise para pequenos sinais de um sistema composto de inversores conectados em paralelo},

author = {E A A Coelho and P C Cortizo and P F Donoso-Garcia},

doi = {10.1590/S0103-17592002000200009 },

year  = {2002},

date = {2002-08-01},

journal = {Sba Controle \& Automa\c{c}\~{a}o},

volume = {13},

number = {02},

pages = {171-178},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{993176,

title = {Small-signal stability for parallel-connected inverters in stand-alone AC supply systems},

author = {E A A Coelho and P C Cortizo and P F D Garcia},

doi = {10.1109/28.993176},

issn = {1939-9367},

year  = {2002},

date = {2002-03-01},

journal = {IEEE Transactions on Industry Applications},

volume = {38},

number = {2},

pages = {533-542},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{923767,

title = {Digital scalar pulse-width modulation: a simple approach to introduce nonsinusoidal modulating waveforms},

author = {C B Jacobina and A M N Lima and E R C Silva and R N C Alves and P F Seixas},

doi = {10.1109/63.923767},

issn = {1941-0107},

year  = {2001},

date = {2001-05-01},

journal = {IEEE Transactions on Power Electronics},

volume = {16},

number = {3},

pages = {351-359},

abstract = {The digital scalar pulse-width modulation (DSPWM) gathers the characteristics of simplicity of implementation found in the regular sampling with the flexibility of manipulation of the switching patterns in the space vector modulation (SVPWM). This paper establishes a correlation between the SVPWM and DSPWM techniques. It also shows how to make the DSPWM strategy equivalent to the SVPWM technique without losing its simplicity of implementation. By using such an equivalence concept a microprocessor-based scheme, which uses standard timer circuits and a simple software algorithm, is proposed to implement the DSPWM technique. The introduction of the "distribution ratio" in this technique, allows the development of a systematic approach for implementing either conventional or any modified vector strategies without changing the modulator scheme. This corresponds to generating any attractive nonsinusoidal modulating signals (NSMS) in the carrier-based modulation techniques. Furthermore, the simple digital blocks can be easily implemented as a specialized integrated circuit. Simulated and experimental results demonstrate the validity of the proposed methods.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lacerda2001,

title = {Controle de Posi\c{c}\~{a}o de uma M\'{a}quina S\'{i}ncrona a \'{I}m\~{a}s Permanentes},

author = {W S Lacerda and P F Seixas},

url = {http://algol.dcc.ufla.br/~lacerda/publicacoes/SINERGIA/controle_maquina_sincrona_2001.pdf},

year  = {2001},

date = {2001-01-01},

journal = {Sinergia (CEFET-MG)},

volume = {1},

pages = {56-63},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{855463,

title = {Use of a priori information in the identification of global nonlinear models-a case study using a buck converter},

author = {L A Aguirre and P F Donoso-Garcia and R Santos-Filho},

doi = {10.1109/81.855463},

issn = {1558-1268},

year  = {2000},

date = {2000-07-01},

journal = {IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications},

volume = {47},

number = {7},

pages = {1081-1085},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Cortizo2000,

title = {Controle de Temperatura de uma Torneira Eletrica: um Experimento para Ensino},

author = {P C Cortizo and R T Pena and F R Caldeira and K A {Nogueira Jr}},

year  = {2000},

date = {2000-01-01},

journal = {Revista Brasileira de Engenharia Abenge},

volume = {19},

number = {2},

pages = {41-45},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Luiz1999,

title = {Retificador monof\'{a}sico chaveado},

author = {A A Luiz and M M Stopa and P C Cortizo},

year  = {1999},

date = {1999-01-01},

journal = {Educa\c{c}\~{a}o \& Tecnologia},

volume = {4},

pages = {25-28},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{707040,

title = {Sliding-mode control for current distribution in parallel-connected DC-DC converters},

author = {P F Donoso-Garcia and P C Cortizo and B R de Menezes and M A S Mendes},

doi = {10.1049/ip-epa:19981801},

issn = {1350-2352},

year  = {1998},

date = {1998-07-01},

journal = {IEE Proceedings - Electric Power Applications},

volume = {145},

number = {4},

pages = {333-338},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{deWit1997,

title = {Robust torque control design for induction motors: The minimum energy approach☆},

author = {C. Canudas de Wit and S I Seleme},

doi = {10.1016/S0005-1098(96)00142-2},

year  = {1997},

date = {1997-01-01},

journal = {Automatica},

volume = {3},

number = {1},

pages = {63-79},

abstract = {A minimum-energy control for torque regulation in AC-machines is proposed. It is shown that this apporach leads to varying flux operation. Several control laws are studied in connection with this idea. Experimental results are also presented.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lacerda1997,

title = {Estudo e Implementa\c{c}\~{a}o de um Inversor Polo Ressonante},

author = {W S Lacerda and P C Cortizo},

year  = {1997},

date = {1997-01-01},

journal = {Educa\c{c}\~{a}o \& Tecnologia},

volume = {2},

pages = {11-17},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Lacerda1996,

title = {Proposta de um Sistema de Desenvolvimento para Acionamentos El\'{e}tricos},

author = {W S Lacerda and P F Seixas},

url = {http://algol.dcc.ufla.br/~lacerda/publicacoes/Educacao\&Tecnologia/sistema_acionamento_1996.pdf},

year  = {1996},

date = {1996-01-01},

journal = {Educa\c{c}\~{a}o \& Tecnologia},

volume = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{262039,

title = {Nonlinear control of induction motors: torque tracking with unknown load disturbance},

author = {R Ortega and C Canudas and S I Seleme},

doi = {http://dx.doi.org/10.1109/9.262039},

year  = {1993},

date = {1993-01-01},

journal = {IEEE Transactions on Automatic Control},

volume = {38},

number = {11},

pages = {1675-1680},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pd3,

title = {Inversor PWM com Comuta\c{c}\~{a}o N\~{a}o Dissipativa empregando Resson\^{a}ncia Controlada no Barramento de Tens\~{a}o},

author = {P F Donoso-Garcia and Ivo Barbi},

url = {https://www.sba.org.br/revista/volumes/v3n3/v3n3a02.pdf},

year  = {1992},

date = {1992-09-01},

journal = {Sba Controle \& Automa\c{c}\~{a}o},

volume = {3},

number = {3},

pages = {389-397},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Andrejak1985,

title = {La Mise en S\'{e}rie des Transistors de Puissance: Pres\'{e}ntation d'un Hacheur 200 kW - 4 kV},

author = {J M Andrejak and J P R ARCHES and P C Cortizo},

year  = {1985},

date = {1985-01-01},

journal = {Literatas},

volume = {10},

pages = {29-34},

keywords = {},

pubstate = {published},

tppubtype = {article}

}