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Prof. SELEME Jr
Dept. of Electronic Engineering, Federal University of Minas Gerais - UFMG

Basic Info

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Research Keywords & Expertise

0 Multilevel converters
0 Electrical Drives
0 Control and Automation
0 Power electronic converters
0 electromechanical energy conversion

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Short Biography

Seleme Isaac Seleme, Jr. received the B.S. degree in electrical engineering from the Escola Politécnica (USP), Sao Paulo, Brazil, in 1977, the M.S. degree in electrical engineering from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1985, and the Ph.D. degree in control and automation from the Institut National Polytechnique de Grenoble (INPG), Grenoble, France, in 1994 He spent sabbatical leaves with the Power Electronics Group, University of California, Berkeley, in 2002, and at LAPLACE Laboratory – University of Toulouse, France, in 2015. He is currently full professor with the Department of Electronic Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil. His research interests are multilevel converters, electrical drives, control of power electronic converters applied to renewable energy and electro mechanic systems.

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Article
Published: 01 June 2021 in Ingeniare. Revista chilena de ingeniería
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In photovoltaic (PV) generation systems, the energy produced is limited by the low efficiency of the solar panels, the variability of weather conditions, and the characteristics of the load connected, so the use of maximum power point tracking (MPPT) methods is essential to maximize the power supplied. Implementing an MPPT requires a power converter as the interface between the PV array and the load, so the converter's behavior is also an important factor to be considered in the overall performance of a PV system. Several MPPT techniques have been proposed over the years, but little literature is still available when required to be compared to the combined performance of different MPPT/converter sets. In this context, the present work presents a comparative study of the performance of three MPPT techniques: constant voltage (CV), perturb and observe (P&O), and incremental conductance (IncCond), acting on two different topologies of DC-DC power converters: Buck and Buck-Boost. Each combination is analyzed considering its transient response and steady-state average efficiency. The study was carried out based on simulations in Matlab/Simulink environment. To obtain more realistic conditions, a model for the commercial PV module Kyocera KC85TS was developed. Results obtained from the PV system operating under various radiation and temperature conditions are compared and discussed, which show that the CV/Buck-Boost combination showed the best transient behavior and that the IncCond/Buck combination had the highest steady-state efficiency.

ACS Style

Julio López Seguel; S.I Seleme Jr; Lenin M.F Moráis. Comparison of the performance of MPPT methods applied in converters Buck and Buck-Boost for autonomous photovoltaic systems. Ingeniare. Revista chilena de ingeniería 2021, 29, 229 -244.

AMA Style

Julio López Seguel, S.I Seleme Jr, Lenin M.F Moráis. Comparison of the performance of MPPT methods applied in converters Buck and Buck-Boost for autonomous photovoltaic systems. Ingeniare. Revista chilena de ingeniería. 2021; 29 (2):229-244.

Chicago/Turabian Style

Julio López Seguel; S.I Seleme Jr; Lenin M.F Moráis. 2021. "Comparison of the performance of MPPT methods applied in converters Buck and Buck-Boost for autonomous photovoltaic systems." Ingeniare. Revista chilena de ingeniería 29, no. 2: 229-244.

Journal article
Published: 14 February 2021 in Energies
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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.

ACS Style

Julio López Seguel; Seleme I. Seleme. Robust Digital Control Strategy Based on Fuzzy Logic for a Solar Charger of VRLA Batteries. Energies 2021, 14, 1001 .

AMA Style

Julio López Seguel, Seleme I. Seleme. Robust Digital Control Strategy Based on Fuzzy Logic for a Solar Charger of VRLA Batteries. Energies. 2021; 14 (4):1001.

Chicago/Turabian Style

Julio López Seguel; Seleme I. Seleme. 2021. "Robust Digital Control Strategy Based on Fuzzy Logic for a Solar Charger of VRLA Batteries." Energies 14, no. 4: 1001.

Journal article
Published: 08 December 2020 in International Journal of Electrical Power & Energy Systems
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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.

ACS Style

A.H.R. Rosa; L.M.F. Morais; G.O. Fortes; S.I. Seleme Júnior. Practical considerations of nonlinear control techniques applied to static power converters: A survey and comparative study. International Journal of Electrical Power & Energy Systems 2020, 127, 106545 .

AMA Style

A.H.R. Rosa, L.M.F. Morais, G.O. Fortes, S.I. Seleme Júnior. Practical considerations of nonlinear control techniques applied to static power converters: A survey and comparative study. International Journal of Electrical Power & Energy Systems. 2020; 127 ():106545.

Chicago/Turabian Style

A.H.R. Rosa; L.M.F. Morais; G.O. Fortes; S.I. Seleme Júnior. 2020. "Practical considerations of nonlinear control techniques applied to static power converters: A survey and comparative study." International Journal of Electrical Power & Energy Systems 127, no. : 106545.

Journal article
Published: 20 October 2020 in IEEE Transactions on Industry Applications
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In recent years, the combination of battery energy storage systems and static synchronous compensators in a single device, known as ES-STATCOM, has been studied by both academia and industry. The modular multilevel converter (MMC) is an interesting candidate for ES-STATCOM realization. The integration of batteries based on dc/dc converter presents advantages in terms of design flexibility. However, there is a gap in the literature in terms of design and cost-optimization of ES-STATCOM systems. To fill this void, this paper provides a methodology to support engineers to design and perform cost-optimization of ES-STATCOM systems. Both capital expenditures (CAPEX) and operational expenditures (OPEX) due to energy losses and battery replacement are taken into account. The methodology identifies what is the optimum submodule voltage reference which minimizes the ES-STATCOM total cost for a given target of operating time. A lifetime model is employed to predict if battery replacement is required. This model computes the battery capacity fade caused by the operation mission profile considering both calendar and cycling aging mechanisms. The case study is based on a 25 MVA/75 MWh ES-STATCOM connected to a 34.5 kV grid, which provides ancillary services for a photovoltaic (PV) power plant. Different rated blocking voltages are assumed for the semiconductor devices. Moreover, different maximum and minimum allowed state-of-charge (SOC) are adopted in the converter design. The proposed methodology can also be used to find the optimum combination of the battery and IGBT part-numbers based on a given initial set.

ACS Style

Jonathan Hunder Dutra Gherard Pinto; William Caires Silva Amorim; Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Remus Teodorescu. Optimum Design of MMC-Based ES-STATCOM Systems: The Role of the Submodule Reference Voltage. IEEE Transactions on Industry Applications 2020, 57, 3064 -3076.

AMA Style

Jonathan Hunder Dutra Gherard Pinto, William Caires Silva Amorim, Allan Fagner Cupertino, Heverton Augusto Pereira, Seleme Isaac Seleme Junior, Remus Teodorescu. Optimum Design of MMC-Based ES-STATCOM Systems: The Role of the Submodule Reference Voltage. IEEE Transactions on Industry Applications. 2020; 57 (3):3064-3076.

Chicago/Turabian Style

Jonathan Hunder Dutra Gherard Pinto; William Caires Silva Amorim; Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Remus Teodorescu. 2020. "Optimum Design of MMC-Based ES-STATCOM Systems: The Role of the Submodule Reference Voltage." IEEE Transactions on Industry Applications 57, no. 3: 3064-3076.

Journal article
Published: 17 January 2020 in IEEE Transactions on Energy Conversion
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Due to the high integration of renewable energy, the power systems may become more susceptible to unbalanced grid voltages, grid frequency disturbances, harmonic resonances and others. Therefore, several works have pointed out that the ancillary services provided by the energy storage systems can minimize these issues. The combination of energy storage and static synchronous compensators (ES-STATCOM) has been proposed to reduce the cost. Modular multilevel converters (MMC) are featured as a good solution for ES-STATCOM realization, due to their high efficiency, modularity and inherent fault-tolerant structure. However, the study of the integration of the MMC based ES-STATCOM in a complex power system composed of power electronic converters, transmission system, renewable plants, transformers, etc, leads to a high computational burden. Therefore, this work presents a detailed design and implementation of three efficient simulation models of the MMC ES-STATCOM. The performance of these models compared during a grid frequency support case study by a 100 MVA/33 kV ES-STATCOM. In addition, the performance of these models is evaluated during a battery charging process and a grid symmetrical fault. The models are compared through the following aspects: processing time, normalized integral of absolute error, state-of-charge estimation and active and reactive power dynamic response.

ACS Style

Allan Fagner Cupertino; William Caires Silva Amorim; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Sanjay Kumar Chaudhary; Remus Teodorescu. High Performance Simulation Models for ES-STATCOM Based on Modular Multilevel Converters. IEEE Transactions on Energy Conversion 2020, 35, 474 -483.

AMA Style

Allan Fagner Cupertino, William Caires Silva Amorim, Heverton Augusto Pereira, Seleme Isaac Seleme Junior, Sanjay Kumar Chaudhary, Remus Teodorescu. High Performance Simulation Models for ES-STATCOM Based on Modular Multilevel Converters. IEEE Transactions on Energy Conversion. 2020; 35 (1):474-483.

Chicago/Turabian Style

Allan Fagner Cupertino; William Caires Silva Amorim; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Sanjay Kumar Chaudhary; Remus Teodorescu. 2020. "High Performance Simulation Models for ES-STATCOM Based on Modular Multilevel Converters." IEEE Transactions on Energy Conversion 35, no. 1: 474-483.

Journal article
Published: 23 September 2019 in Microelectronics Reliability
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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.

ACS Style

João Victor M. Farias; Allan F. Cupertino; Victor De Nazareth Ferreira; Heverton A. Pereira; Seleme Isaac Seleme. Redundancy design for modular multilevel converter based STATCOMs. Microelectronics Reliability 2019, 100-101, 113471 .

AMA Style

João Victor M. Farias, Allan F. Cupertino, Victor De Nazareth Ferreira, Heverton A. Pereira, Seleme Isaac Seleme. Redundancy design for modular multilevel converter based STATCOMs. Microelectronics Reliability. 2019; 100-101 ():113471.

Chicago/Turabian Style

João Victor M. Farias; Allan F. Cupertino; Victor De Nazareth Ferreira; Heverton A. Pereira; Seleme Isaac Seleme. 2019. "Redundancy design for modular multilevel converter based STATCOMs." Microelectronics Reliability 100-101, no. : 113471.

Journal article
Published: 28 August 2019 in IEEE Transactions on Industrial Electronics
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Modular Multilevel Converters (MMC) are complex systems, composed of many elements, and exposed to critical load demands in some cases. Thereby, a detailed design of its components is of preeminent importance to achieve a high system-level reliability. However, the high number of devices challenges the trade-off between cost and reliability. This work, introduces a reliability-oriented design methodology, based on the cost to achieve a predefined unreliability level ( $U_x$ ). A flowchart presents the main steps of the process, including the mission profile definition, selection of power devices, thermal modeling, reliability modeling and the reliability-oriented selection. To evaluate the proposed methodology, a case study considering 17 MVA/13.8kV MMC-STATCOM with a real mission profile data is conducted. A $U_x$ — $cost$ map is introduced to compare various design solutions, based on power devices of different voltage classes and current capabilities.

ACS Style

Joao Victor Matos Farias; Allan Fagner Cupertino; Victor De Nazareth Ferreira; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu; Seleme Isaac Seleme Junior. Reliability-Oriented Design of Modular Multilevel Converters for Medium-Voltage STATCOM. IEEE Transactions on Industrial Electronics 2019, 67, 6206 -6214.

AMA Style

Joao Victor Matos Farias, Allan Fagner Cupertino, Victor De Nazareth Ferreira, Heverton Augusto Pereira, Seleme Isaac Seleme, Remus Teodorescu, Seleme Isaac Seleme Junior. Reliability-Oriented Design of Modular Multilevel Converters for Medium-Voltage STATCOM. IEEE Transactions on Industrial Electronics. 2019; 67 (8):6206-6214.

Chicago/Turabian Style

Joao Victor Matos Farias; Allan Fagner Cupertino; Victor De Nazareth Ferreira; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu; Seleme Isaac Seleme Junior. 2019. "Reliability-Oriented Design of Modular Multilevel Converters for Medium-Voltage STATCOM." IEEE Transactions on Industrial Electronics 67, no. 8: 6206-6214.

Journal article
Published: 21 August 2019 in IEEE Transactions on Power Delivery
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Modular multilevel converters (MMCs) are frequently featured to their modular structure, which results in fault-tolerant operation and easy redundancy realization. Nevertheless, in order to reach a given redundancy factor, more cells must be included in the converter, which directly affects the costs. This paper discusses the inherent redundancy of a modular multilevel converter (MMC) based static synchronous compensator (STATCOM) operating in the overmodulation region. Analytical expressions for the limits of the converter linear region were developed in order to define the minimum required dc-link voltage. Moreover, sensitivity analyses were implemented in order to show the effects of grid voltage variations, different output impedances, power factor and injected currents. The results indicated that the operation in overmodulation region has significant inherent redundancy. For a MMC based STATCOM with 26 cells, the converter can ride through 4 failures per arm without significantly increasing the output THD or reducing the injected current into the grid.

ACS Style

Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. On Inherent Redundancy of MMC-Based STATCOMs in the Overmodulation Region. IEEE Transactions on Power Delivery 2019, 35, 1169 -1179.

AMA Style

Allan Fagner Cupertino, Heverton Augusto Pereira, Seleme Isaac Seleme, Remus Teodorescu. On Inherent Redundancy of MMC-Based STATCOMs in the Overmodulation Region. IEEE Transactions on Power Delivery. 2019; 35 (3):1169-1179.

Chicago/Turabian Style

Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. 2019. "On Inherent Redundancy of MMC-Based STATCOMs in the Overmodulation Region." IEEE Transactions on Power Delivery 35, no. 3: 1169-1179.

Research article
Published: 01 April 2019 in IET Power Electronics
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In this study, a new control method dedicated to modular multilevel converters (MMCs) is proposed. The approach is based on local communication between the individual controls of each submodule (SM). The local values of the capacitor voltages and the carrier-phase angles are shared between immediate neighbours achieving balancing of their capacitor voltages, and an automatic interleaving of the pulse-width modulation (PWM) signals. Using an inter-cell communication strategy, the number of required data exchanges with a centralised controller is greatly reduced. This method works for any number of SMs present in the converter and provides an integrated dynamic reconfiguration capability to enable or disable SMs during operation, without any additional consideration for the control-algorithm's implementation. Such a capability is not offered by classical MMC control methods using either PWM or nearest-level control strategies. Higher stability, robustness and larger bandwidth of the proposed method are first demonstrated through real-time simulation. The auto-interleaving of the PWM carriers and the capacitor-voltage balancing, provide fast responses and adequate accuracy. Experimental results are provided using a 600 V/3 kW/18 cells single-phase MMC demonstrator confirming the simulation results, and the advantages of this SM control strategy.

ACS Style

Seleme Isaac Seleme; Luc‐André Grégoire; Marc Cousineau; Philippe Ladoux. Modular control with carrier auto‐interleaving and capacitor‐voltage balancing for MMCs. IET Power Electronics 2019, 12, 817 -828.

AMA Style

Seleme Isaac Seleme, Luc‐André Grégoire, Marc Cousineau, Philippe Ladoux. Modular control with carrier auto‐interleaving and capacitor‐voltage balancing for MMCs. IET Power Electronics. 2019; 12 (4):817-828.

Chicago/Turabian Style

Seleme Isaac Seleme; Luc‐André Grégoire; Marc Cousineau; Philippe Ladoux. 2019. "Modular control with carrier auto‐interleaving and capacitor‐voltage balancing for MMCs." IET Power Electronics 12, no. 4: 817-828.

Journal article
Published: 09 March 2018 in Energies
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In this paper, we propose adaptive nonlinear controllers for the Single-Ended Primary Inductance Converter (SEPIC). We also consider four distinct situations: AC-DC, DC-DC, Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM). A comparative analysis between classic linear and nonlinear approaches to regulate the control loop is made. Three adaptive nonlinear control laws are designed: Feedback Linearization Control (FLC), Passivity-Based Control (PBC) and Interconnection and Damping Assignment Passivity-Based Control (IDAPBC). In order to compare the performance of these control techniques, numerical simulations were made in Software and Hardware in the Loop (HIL) for nominal conditions and operation disturbances. We recommend adaptive controllers for the two different situations: Adaptive Passivity-Based Feedback Linearization Control (APBFLC) for the PFC (Power Factor Correction) AC-DC system and IDAPBC-BB (IDAPBC Based on Boost converter) for the regulator DC-DC system.

ACS Style

Arthur H. R. Rosa; Thiago M. De Souza; Lenin M. F. Morais; Jr. Seleme I. Seleme. Adaptive and Nonlinear Control Techniques Applied to SEPIC Converter in DC-DC, PFC, CCM and DCM Modes Using HIL Simulation. Energies 2018, 11, 602 .

AMA Style

Arthur H. R. Rosa, Thiago M. De Souza, Lenin M. F. Morais, Jr. Seleme I. Seleme. Adaptive and Nonlinear Control Techniques Applied to SEPIC Converter in DC-DC, PFC, CCM and DCM Modes Using HIL Simulation. Energies. 2018; 11 (3):602.

Chicago/Turabian Style

Arthur H. R. Rosa; Thiago M. De Souza; Lenin M. F. Morais; Jr. Seleme I. Seleme. 2018. "Adaptive and Nonlinear Control Techniques Applied to SEPIC Converter in DC-DC, PFC, CCM and DCM Modes Using HIL Simulation." Energies 11, no. 3: 602.

Journal article
Published: 02 March 2018 in IEEE Transactions on Industrial Electronics
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Among the various topologies proposed in literature, the Modular Multilevel Converter (MMC) is considered the next generation of converters for medium and high voltage applications. This paper presents a comparison between two variants of modular multilevel converters for STATCOM applications: The Double-Star Chopper Cell (DSCC-MMC) and the Single-Delta Bridge Cell (SDBC-MMC). These converter topologies are compared and benchmarked during positive and negative sequence compensation. The comparisons are supported by analytical results regarding minimum effective dc-link voltage, number of cells, current rating, energy storage requirements and operation during unbalanced conditions. The dynamic behavior, power losses and cost of both solutions are evaluated through simulation model of a 15 MVA MMC STATCOM.

ACS Style

Allan Fagner Cupertino; Joao Victor Matos Farias; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. Comparison of DSCC and SDBC Modular Multilevel Converters for STATCOM Application During Negative Sequence Compensation. IEEE Transactions on Industrial Electronics 2018, 66, 2302 -2312.

AMA Style

Allan Fagner Cupertino, Joao Victor Matos Farias, Heverton Augusto Pereira, Seleme Isaac Seleme, Remus Teodorescu. Comparison of DSCC and SDBC Modular Multilevel Converters for STATCOM Application During Negative Sequence Compensation. IEEE Transactions on Industrial Electronics. 2018; 66 (3):2302-2312.

Chicago/Turabian Style

Allan Fagner Cupertino; Joao Victor Matos Farias; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. 2018. "Comparison of DSCC and SDBC Modular Multilevel Converters for STATCOM Application During Negative Sequence Compensation." IEEE Transactions on Industrial Electronics 66, no. 3: 2302-2312.

Article
Published: 06 November 2017 in Journal of Control, Automation and Electrical Systems
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The double-star chopper cell modular multilevel converter (DSCC-MMC) has been employed in several applications as HVDC, energy storage, renewable energy, electrical drives and STATCOMs. Generally, the DSCC-MMC main circuit parameter design presented in literature considers balanced currents flowing through the converter. Nevertheless, in STATCOM application, the converter can compensate negative sequence components and unbalanced currents flow through the DSCC-MMC, resulting in different stresses in the converter phases. Therefore, this work presents a detailed design methodology of the DSCC-MMC main circuit parameters, considering both positive and negative sequence current compensations. The dc-link voltage, number of submodules, power semiconductor thermal stresses, submodule capacitance and arm inductances are designed. Expressions for the energy storage requirements are derived when negative sequence is compensated. A case study considering a 15-MVA STATCOM is presented, and simulation results validate the proposed design methodology. Finally, the converter power losses and thermal stresses in the power semiconductors are evaluated.

ACS Style

Allan Fagner Cupertino; João Victor Matos Farias; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. DSCC-MMC STATCOM Main Circuit Parameters Design Considering Positive and Negative Sequence Compensation. Journal of Control, Automation and Electrical Systems 2017, 29, 62 -74.

AMA Style

Allan Fagner Cupertino, João Victor Matos Farias, Heverton Augusto Pereira, Seleme Isaac Seleme, Remus Teodorescu. DSCC-MMC STATCOM Main Circuit Parameters Design Considering Positive and Negative Sequence Compensation. Journal of Control, Automation and Electrical Systems. 2017; 29 (1):62-74.

Chicago/Turabian Style

Allan Fagner Cupertino; João Victor Matos Farias; Heverton Augusto Pereira; Seleme Isaac Seleme; Remus Teodorescu. 2017. "DSCC-MMC STATCOM Main Circuit Parameters Design Considering Positive and Negative Sequence Compensation." Journal of Control, Automation and Electrical Systems 29, no. 1: 62-74.

Journal article
Published: 08 June 2017 in IEEE Transactions on Power Delivery
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The modular multilevel converters (MMCs) have become an attractive topology in recent years. The MMC has been employed in several applications as HVDC, energy storage, renewable energy, electrical drives and STATCOMs. One of advantages of MMC based topologies is the inherited fault-tolerant operation associated with the high number of submodules (SMs). This work proposes the study of four redundancy strategies which can be employed in modular multilevel converters: Standard Redundancy (SR); Redundancy Strategy based on Additional Submodules (RAS); Redundancy Strategy based on Additional Submodules Optimized (RASO); and Redundancy Strategy based on Spare Submodules (RSS). These strategies are compared through a case study of a 15 MVA MMC STATCOM. A new approach for the SM capacitance design is proposed, including the effect of the negative sequence current in the converter storage energy variations. The comparisons of the redundancy strategies are accomplished based on dynamic behavior, capacitor voltage balancing, control complexity and power losses. Finally, the advantages and drawbacks of each redundancy strategy are presented.

ACS Style

Joao Victor Matos Farias; Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Remus Teodorescu. On the Redundancy Strategies of Modular Multilevel Converters. IEEE Transactions on Power Delivery 2017, 33, 851 -860.

AMA Style

Joao Victor Matos Farias, Allan Fagner Cupertino, Heverton Augusto Pereira, Seleme Isaac Seleme Junior, Remus Teodorescu. On the Redundancy Strategies of Modular Multilevel Converters. IEEE Transactions on Power Delivery. 2017; 33 (2):851-860.

Chicago/Turabian Style

Joao Victor Matos Farias; Allan Fagner Cupertino; Heverton Augusto Pereira; Seleme Isaac Seleme Junior; Remus Teodorescu. 2017. "On the Redundancy Strategies of Modular Multilevel Converters." IEEE Transactions on Power Delivery 33, no. 2: 851-860.

Conference paper
Published: 01 May 2016 in 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)
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This paper proposes to observe a set of capacitor voltages from modular multilevel converter using only one current and one voltage measurement for the ensemble. This is achieved by estimating the voltage values using the current and the gating signal. The estimation is then corrected using a sliding mode control on the voltage error of the whole half-arm. When compared with previously proposed observers, this one has the advantage of being simpler and expandable to any number of submodules. Furthermore, each half-arm can be treated independently, making it possible to solve them in parallel. Accuracy of the proposed observer is demonstrated through a real-time simulation of a 300 submodules three-phase modular multilevel converter during initialization, steady-state and AC-fault operation.

ACS Style

Luc-André Grégoire; Weihua Wang; Seleme Isaac Seleme; Maurice Fadel; Seleme Isaac Seleme Junior. High reliability observers for modular multilevel converter capacitor voltage evaluation. 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) 2016, 2332 -2336.

AMA Style

Luc-André Grégoire, Weihua Wang, Seleme Isaac Seleme, Maurice Fadel, Seleme Isaac Seleme Junior. High reliability observers for modular multilevel converter capacitor voltage evaluation. 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia). 2016; ():2332-2336.

Chicago/Turabian Style

Luc-André Grégoire; Weihua Wang; Seleme Isaac Seleme; Maurice Fadel; Seleme Isaac Seleme Junior. 2016. "High reliability observers for modular multilevel converter capacitor voltage evaluation." 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) , no. : 2332-2336.

Journal article
Published: 01 September 2015 in Eletrônica de Potência
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Keywords: Partial Shading, Current Diverter, String Converter, Efficiency Enhancement, PV modules.

ACS Style

Claudio Dos Santos; Pedro Donoso-Garcia; Seleme Isaac Seleme Junior; André De Magalhães. Cascaded Cell String Current Diverter for Improvement of Photovoltaic Solar Array Under Partial Shading Problems. Eletrônica de Potência 2015, 20, 272 -282.

AMA Style

Claudio Dos Santos, Pedro Donoso-Garcia, Seleme Isaac Seleme Junior, André De Magalhães. Cascaded Cell String Current Diverter for Improvement of Photovoltaic Solar Array Under Partial Shading Problems. Eletrônica de Potência. 2015; 20 (3):272-282.

Chicago/Turabian Style

Claudio Dos Santos; Pedro Donoso-Garcia; Seleme Isaac Seleme Junior; André De Magalhães. 2015. "Cascaded Cell String Current Diverter for Improvement of Photovoltaic Solar Array Under Partial Shading Problems." Eletrônica de Potência 20, no. 3: 272-282.

Conference paper
Published: 01 June 2015 in 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE)
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This paper presents the study of dynamic modeling and control of a converter of multiple inputs (MIC) with MPPT. There are two independent inputs, wind and photovoltaic sources (PV), connected to a DC bus, and a single converter (MIC) as a means of reducing system costs. In order to extract maximum energy from the PV system for a given solar irradiance and temperature, an approach of adjusting the converter switching cycle and track the maximum power point (MPPT), with an incremental conductance algorithm is proposed. The small signal average dynamics for the multiple inputs (MIC) Cúk converter is derived and used for the control design. Simulation is made using MATLAB / Simulink.

ACS Style

Natalia Alcantara Da Silva; Seleme Isaac Seleme; Seleme Isaac Seleme Junior. Modeling and control of a Cúk multiple input converter (MIC) with MPPT for the PV system. 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE) 2015, 312 -317.

AMA Style

Natalia Alcantara Da Silva, Seleme Isaac Seleme, Seleme Isaac Seleme Junior. Modeling and control of a Cúk multiple input converter (MIC) with MPPT for the PV system. 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE). 2015; ():312-317.

Chicago/Turabian Style

Natalia Alcantara Da Silva; Seleme Isaac Seleme; Seleme Isaac Seleme Junior. 2015. "Modeling and control of a Cúk multiple input converter (MIC) with MPPT for the PV system." 2015 IEEE 24th International Symposium on Industrial Electronics (ISIE) , no. : 312-317.

Journal article
Published: 01 December 2013 in Ingeniare. Revista chilena de ingeniería
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ACS Style

Julio López Seguel; Seleme Isaac Seleme Junior; Pedro F Donoso-Garcia; Lenin Martins Ferreira Morais; Porfirio Cabaleiro Cortizo; Marcos A Severo Mendes. Methodology for the design of a stand-alone photovoltaic power supply. Ingeniare. Revista chilena de ingeniería 2013, 21, 380 -393.

AMA Style

Julio López Seguel, Seleme Isaac Seleme Junior, Pedro F Donoso-Garcia, Lenin Martins Ferreira Morais, Porfirio Cabaleiro Cortizo, Marcos A Severo Mendes. Methodology for the design of a stand-alone photovoltaic power supply. Ingeniare. Revista chilena de ingeniería. 2013; 21 (3):380-393.

Chicago/Turabian Style

Julio López Seguel; Seleme Isaac Seleme Junior; Pedro F Donoso-Garcia; Lenin Martins Ferreira Morais; Porfirio Cabaleiro Cortizo; Marcos A Severo Mendes. 2013. "Methodology for the design of a stand-alone photovoltaic power supply." Ingeniare. Revista chilena de ingeniería 21, no. 3: 380-393.

Journal article
Published: 01 February 2013 in Eletrônica de Potência
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Lenin Morais; Pedro Francisco Donoso-Garcia; Seleme Isaac Seleme Junior; Porfírio Cabalero Cortizo. Harmonics injection in HPS electronic ballast with modulation index control. Eletrônica de Potência 2013, 18, 815 -822.

AMA Style

Lenin Morais, Pedro Francisco Donoso-Garcia, Seleme Isaac Seleme Junior, Porfírio Cabalero Cortizo. Harmonics injection in HPS electronic ballast with modulation index control. Eletrônica de Potência. 2013; 18 (1):815-822.

Chicago/Turabian Style

Lenin Morais; Pedro Francisco Donoso-Garcia; Seleme Isaac Seleme Junior; Porfírio Cabalero Cortizo. 2013. "Harmonics injection in HPS electronic ballast with modulation index control." Eletrônica de Potência 18, no. 1: 815-822.

Journal article
Published: 01 January 2013 in European Journal of Control
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This paper addresses the control of Boost converters applied for Power Factor Correction in universal-line applications with unknown load, using adaptive nonlinear control based on passivity. The closed loop system stability is discussed based on the analysis of the internal dynamics resulting from the use of the proposed control strategy. The performance of the proposed PFC rectifier is tested on an experimental 630-W universal-line PFC prototype.

ACS Style

Seleme Isaac Jr. Seleme; Lenin Martins Ferreira Morais; Arthur Hermano Rezende Rosa; Leonardo Antônio Borges Torres; Seleme Isaac Seleme Junior. Stability in passivity-based boost converter controller for power factor correction. European Journal of Control 2013, 19, 56 -64.

AMA Style

Seleme Isaac Jr. Seleme, Lenin Martins Ferreira Morais, Arthur Hermano Rezende Rosa, Leonardo Antônio Borges Torres, Seleme Isaac Seleme Junior. Stability in passivity-based boost converter controller for power factor correction. European Journal of Control. 2013; 19 (1):56-64.

Chicago/Turabian Style

Seleme Isaac Jr. Seleme; Lenin Martins Ferreira Morais; Arthur Hermano Rezende Rosa; Leonardo Antônio Borges Torres; Seleme Isaac Seleme Junior. 2013. "Stability in passivity-based boost converter controller for power factor correction." European Journal of Control 19, no. 1: 56-64.

Conference paper
Published: 01 November 2012 in 2012 10th IEEE/IAS International Conference on Industry Applications
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The power generated by a solar photovoltaic panel is strongly dependent on climate conditions. For this reason, a grid-connected system needs a good response for variations in the solar irradiance and temperature. A non-linear control technique which has a good rejection of disturbances is the passivity-based control. This work presents the application of the passivity-based control in a maximum power tracker boost converter for a grid-connected photovoltaic system. The fast response of the control allows a better use of the photovoltaic array energy, increasing the efficiency of the system, and ensuring stability for all operation range.

ACS Style

Allan Fagner Cupertino; J. T. De Resende; Heverton Pereira; Seleme Isaac Seleme Junior. A grid-connected photovoltaic system with a maximum power point tracker using passivity-based control applied in a boost converter. 2012 10th IEEE/IAS International Conference on Industry Applications 2012, 1 -8.

AMA Style

Allan Fagner Cupertino, J. T. De Resende, Heverton Pereira, Seleme Isaac Seleme Junior. A grid-connected photovoltaic system with a maximum power point tracker using passivity-based control applied in a boost converter. 2012 10th IEEE/IAS International Conference on Industry Applications. 2012; ():1-8.

Chicago/Turabian Style

Allan Fagner Cupertino; J. T. De Resende; Heverton Pereira; Seleme Isaac Seleme Junior. 2012. "A grid-connected photovoltaic system with a maximum power point tracker using passivity-based control applied in a boost converter." 2012 10th IEEE/IAS International Conference on Industry Applications , no. : 1-8.