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Phase-Locked Loop (PLL) circuits have contributed to modernising electrical grids in different segments, such as distributed generation, identification and characterisation of phenomena related to power quality, localisation of faults, among others. This justifies the undergone research aiming at increasing their performance under certain conditions. Taking the example of the single-phase PLLs, researchers have worked out ways to cope with the characteristic doubly-frequency oscillation, which can undermine the performance of the frequency and phase tracking and compromise the extraction of the fundamental component from the input signal. In this sense, the present article aims at analysing a single-phase PLL circuit providing a methodology to adjust the control gains and minimise low-frequency oscillation. As for the analysed PLL, simulations in the time domain were carried out for modified versions of the well-known E-PLL, SOGI-PLL, and APF-PLL, all of them comprising notch filters and to cope with the doubly-frequency oscillation.
Dayane M. Lessa; Michel P. Tcheou; Cleiton M. Freitas; Luís Fernando C. Monteiro. Mitigation of Low-Frequency Oscillations by Tuning Single-Phase Phase-Locked Loop Circuits. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2021, 132 -151.
AMA StyleDayane M. Lessa, Michel P. Tcheou, Cleiton M. Freitas, Luís Fernando C. Monteiro. Mitigation of Low-Frequency Oscillations by Tuning Single-Phase Phase-Locked Loop Circuits. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2021; ():132-151.
Chicago/Turabian StyleDayane M. Lessa; Michel P. Tcheou; Cleiton M. Freitas; Luís Fernando C. Monteiro. 2021. "Mitigation of Low-Frequency Oscillations by Tuning Single-Phase Phase-Locked Loop Circuits." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 132-151.
This paper presents a linearized Thévenin-equivalent circuit for a grid-forming Modular Multilevel Converter (MMC) under double closed-loop control, comprehending an outer voltage control-loop together with an inner current control-loop. Both the AC-side Thévenin model and the equivalent admittance of the DC-side were derived in this work. The proposed MMC model takes into account the influence of passive elements and the control-loop effects on the impedances and gains. With this model it was possible to observe how the control system parameters changes resonant frequencies in both DC-side equivalent admittance and AC-side equivalent model. A comparison between the frequency response of the proposed analytical model and the frequency response obtained from the nonlinear time-domain model is presented to validate the proposed MMC model. The proposed model allows analyzing the dynamic response of the MMC as grid-forming converter in the frequency domain. Finally, as an application example, the stability of an ordinary power-electronic-based system (comprised of a grid-forming MMC supplying a current controlled MMC) was assessed and PSCAD/EMTDC simulations are presented to validate the results predicted by the proposed model.
Cleiton Magalhães Freitas; Edson Hirokazu Watanabe; Luís Fernando Corrêa Monteiro. A linearized small-signal Thévenin-equivalent model of a voltage-controlled modular multilevel converter. Electric Power Systems Research 2020, 182, 106231 .
AMA StyleCleiton Magalhães Freitas, Edson Hirokazu Watanabe, Luís Fernando Corrêa Monteiro. A linearized small-signal Thévenin-equivalent model of a voltage-controlled modular multilevel converter. Electric Power Systems Research. 2020; 182 ():106231.
Chicago/Turabian StyleCleiton Magalhães Freitas; Edson Hirokazu Watanabe; Luís Fernando Corrêa Monteiro. 2020. "A linearized small-signal Thévenin-equivalent model of a voltage-controlled modular multilevel converter." Electric Power Systems Research 182, no. : 106231.
An experimental evaluation of a digital control system based on a dual Digital Signal Processor (DSP) architecture is proposed for a three phase Unified Power Quality Conditioner (UPQC). A classical UQPC is constituted by two power conditioners, connected in series and shunted with the power grid, and sharing a common DC-link. In a smart grid scenario of operation, a UPQC will be fundamental for compensating power quality problems, also contributing to improving the efficiency of the electrical grids from a global perspective. The UPQC operation requires a bidirectional energy transfer between the two power conditioners, however, respecting some constraints, they can be controlled independently. In order to take advantage of this characteristic, the control algorithms can be executed on two independent DSPs, without any communication between them and maintaining the operational characteristics of the UPQC. Comparing with the classical control architecture based on a single DSP, with the proposed dual DSP architecture, the computational effort of each DSP is decreased of about 35%, allowing to increase the sampling rate. Therefore, the main advantages of the proposed approach are the minimization of delays caused by the processing time, which are very common in digital control systems, as well as the increment of the UPQC performance. Along the paper, detailed analysis of the processing speed and memory requirements to implement the UPQC control algorithms in both DSPs is presented. The paper also presents a set of detailed experimental results, obtained with a developed 5 kVA laboratory prototype of UPQC, which was used to evaluate the performance of the proposed dual DSP architecture.
Luís Monteiro; Bruno Exposto; Gabriel Pinto; Vitor Monteiro; Maurício Aredes; João L. Afonso. Experimental Evaluation of a Control System Based on a Dual-DSP Architecture for a Unified Power Quality Conditioner. Energies 2019, 12, 1694 .
AMA StyleLuís Monteiro, Bruno Exposto, Gabriel Pinto, Vitor Monteiro, Maurício Aredes, João L. Afonso. Experimental Evaluation of a Control System Based on a Dual-DSP Architecture for a Unified Power Quality Conditioner. Energies. 2019; 12 (9):1694.
Chicago/Turabian StyleLuís Monteiro; Bruno Exposto; Gabriel Pinto; Vitor Monteiro; Maurício Aredes; João L. Afonso. 2019. "Experimental Evaluation of a Control System Based on a Dual-DSP Architecture for a Unified Power Quality Conditioner." Energies 12, no. 9: 1694.
This paper addresses a control algorithm to determine the reference currents indirectly from the grid voltages, taking into account the limited capacity of the power converter for compensating, entirely, the selected harmonic current. In previous works, the reference current was indirectly determined based on an average component correlated with the selected harmonic current. Thus, when the selected harmonic current was entirely compensated, that average value was decreased to zero. Now, this paper introduces a novel control algorithm considering the limited capacity of the power converter for producing the selected harmonic current. In this novel condition, the phase-angle of the reference current is dynamically modified while the minimum point of the cost function is not reached. The remaining parameters of the reference currents correspond to the harmonic frequency and amplitude as well. The harmonic frequency was identified through a PLL (Phase-Locked-Loop) circuit whereas the amplitude corresponds to a specific value of 10A to all of the developed test cases. Other aspects of the simulated power circuit, control algorithms, including the optimization methods, are described throughout the paper. Simulation results involving different test cases were implemented to verify the performance of the proposed algorithm compensating of the fifth-harmonic component under transient -and steady-state conditions.
Nayara V. Oliveira; Cleiton M. Freitas; Luis F. C. Monteiro. A Selective Harmonic Compensation with Current Limiting Algorithm. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019, 103 -118.
AMA StyleNayara V. Oliveira, Cleiton M. Freitas, Luis F. C. Monteiro. A Selective Harmonic Compensation with Current Limiting Algorithm. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2019; ():103-118.
Chicago/Turabian StyleNayara V. Oliveira; Cleiton M. Freitas; Luis F. C. Monteiro. 2019. "A Selective Harmonic Compensation with Current Limiting Algorithm." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 103-118.
The growing concern on environmental issues caused by fossil fuels and, indeed, on the availability of such energy resources in a long-run basis have settled the ground for the spreading of the so called green energy sources. Among them, photovoltaic energy stands out due to the possibility of turning practically any household into a micro power plant. One important aspect about this source of energy is that practical photovoltaic generators are equipped with maximum power point tracking (MPPT) systems. Currently, researchers are focused on developing MPPT algorithms for partial shaded panels, among which, particle swarm optimization (PSO) MPPT stands out. PSO is an artificial intelligence method based on the behavior of flock of birds and it works arranging a group of mathematical entities named particles to deal with an optimization problem. Thus, this work focus on analyzing the performance of this algorithm under different design conditions, which means different amount of particles and different set points for the constants. Besides that, the article presents a brief guideline on how to implement PSO-MPPT. Simulations of an array with three photovoltaic panels, boost-converter driven, were carried out in order to back the analyzes.
André Luiz Marques Leopoldino; Cleiton Magalhães Freitas; Luís Fernando Corrêa Monteiro. On the Effects of Parameter Adjustment on the Performance of PSO-Based MPPT of a PV-Energy Generation System. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019, 175 -192.
AMA StyleAndré Luiz Marques Leopoldino, Cleiton Magalhães Freitas, Luís Fernando Corrêa Monteiro. On the Effects of Parameter Adjustment on the Performance of PSO-Based MPPT of a PV-Energy Generation System. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2019; ():175-192.
Chicago/Turabian StyleAndré Luiz Marques Leopoldino; Cleiton Magalhães Freitas; Luís Fernando Corrêa Monteiro. 2019. "On the Effects of Parameter Adjustment on the Performance of PSO-Based MPPT of a PV-Energy Generation System." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 175-192.
Fast charging stations are a key element for the wide spreading of Electric Vehicles (EVs) by reducing the charging time to a range between 20 to 40 min. However, the integration of fast charging stations causes some adverse impacts on the Power Grid (PG), namely by the huge increase in the peak demand during short periods of time. This paper addresses the design of the power electronics converters for an EV DC fast charging station with local storage capability and easy interface of renewables. In the proposed topology, the energy storage capability is used to smooth the peak power demand, inherent to fast charging systems, and contributes to the stability of the PG. When integrated in a Smart Grid, the proposed topology may even return some of the stored energy back to the power grid, when necessary. The accomplishment of the aforementioned objectives requires a set of different power electronics converters that are described and discussed in this paper.
J. G. Pinto; Vítor Monteiro; Bruno Exposto; Luis A. M. Barros; Tiago J. C. Sousa; Luís F.C. Monteiro; João L. Afonso. Power Electronics Converters for an Electric Vehicle Fast Charging Station with Storage Capability. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019, 119 -130.
AMA StyleJ. G. Pinto, Vítor Monteiro, Bruno Exposto, Luis A. M. Barros, Tiago J. C. Sousa, Luís F.C. Monteiro, João L. Afonso. Power Electronics Converters for an Electric Vehicle Fast Charging Station with Storage Capability. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2019; ():119-130.
Chicago/Turabian StyleJ. G. Pinto; Vítor Monteiro; Bruno Exposto; Luis A. M. Barros; Tiago J. C. Sousa; Luís F.C. Monteiro; João L. Afonso. 2019. "Power Electronics Converters for an Electric Vehicle Fast Charging Station with Storage Capability." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 119-130.
L. F. C. Monteiro; C. M. Freitas; M. D. Bellar. Improvements on the Incremental Conductance MPPT Method Applied to a PV String with Single-Phase to Three-Phase Converter for Rural Grid Applications. Advances in Electrical and Computer Engineering 2019, 19, 63 -70.
AMA StyleL. F. C. Monteiro, C. M. Freitas, M. D. Bellar. Improvements on the Incremental Conductance MPPT Method Applied to a PV String with Single-Phase to Three-Phase Converter for Rural Grid Applications. Advances in Electrical and Computer Engineering. 2019; 19 (1):63-70.
Chicago/Turabian StyleL. F. C. Monteiro; C. M. Freitas; M. D. Bellar. 2019. "Improvements on the Incremental Conductance MPPT Method Applied to a PV String with Single-Phase to Three-Phase Converter for Rural Grid Applications." Advances in Electrical and Computer Engineering 19, no. 1: 63-70.
This work addresses a low-power single-phase to three-phase conversion system. The goal of such system is its simplicity, cost and robustness. Furthermore, the OCC technique and a very simple reference signal generator to drive the three-phase voltage source inverter are integrated to perform the introduced converter. To evaluate the proposed conversion system, simulation results were acquired through low power operation test cases In sequence, these results were summarized including comments, comparative analysis and conclusions. A preliminary experimental verification was also carried out to verify the feasibility of the proposed conversion system.
Aluisio Alves De Melo Bento; Marcia Debora De Lima; Maria Dias Bellar; Luís Fernando Corrêa Monteiro. Single-Phase to Thee-Phase Conversion System. 2018 13th IEEE International Conference on Industry Applications (INDUSCON) 2018, 1291 -1298.
AMA StyleAluisio Alves De Melo Bento, Marcia Debora De Lima, Maria Dias Bellar, Luís Fernando Corrêa Monteiro. Single-Phase to Thee-Phase Conversion System. 2018 13th IEEE International Conference on Industry Applications (INDUSCON). 2018; ():1291-1298.
Chicago/Turabian StyleAluisio Alves De Melo Bento; Marcia Debora De Lima; Maria Dias Bellar; Luís Fernando Corrêa Monteiro. 2018. "Single-Phase to Thee-Phase Conversion System." 2018 13th IEEE International Conference on Industry Applications (INDUSCON) , no. : 1291-1298.
This work addresses a new VSI control strategy based on the One Cycle Control Technique. Comparisons with other control strategies were done to highlight the main features of the proposed control strategy. Simulation and preliminary experimental results are carried out to corroborate the theoretical prediction.
Aluisio Alves De Melo Bento; Luís Fernando Corrêa Monteiro. Integration Control Strategy for Voltage Source Inverter. 2018 13th IEEE International Conference on Industry Applications (INDUSCON) 2018, 1220 -1225.
AMA StyleAluisio Alves De Melo Bento, Luís Fernando Corrêa Monteiro. Integration Control Strategy for Voltage Source Inverter. 2018 13th IEEE International Conference on Industry Applications (INDUSCON). 2018; ():1220-1225.
Chicago/Turabian StyleAluisio Alves De Melo Bento; Luís Fernando Corrêa Monteiro. 2018. "Integration Control Strategy for Voltage Source Inverter." 2018 13th IEEE International Conference on Industry Applications (INDUSCON) , no. : 1220-1225.
Fast Charging Stations (FCS) are a key element for the wide spreading of Electric Vehicles (EVs), by reducing the charging time to a range between 20 to 40 minutes. However, the integration of FCS causes some adverse impacts on the Power Grid (PG), namely the huge increase in the peak demand during short periods of time. This paper addresses the design of power electronics converters for an EV DC FCS with local storage capability and easy interface of renewables. In the proposed architecture, the energy storage capability is used to smooth the peak power demand and contributes to stabilize the PG. When integrated in a smart grid, the proposed architecture may even return some of the stored energy back to the PG. The accomplishment of the aforementioned objectives requires a set of different power electronics converters, described and discussed along the paper. In order to demonstrate the potentialities of the proposed EV DC FCS architecture, four different case studies were analysed.
J.G. Pinto; Vitor Monteiro; Bruno Exposto; Luis A. M. Barros; Tiago J.C. Sousa; L.F.C. Monteiro; João L. Afonso. Power Electronics Converters for an Electric Vehicle Fast Charging Station with Energy Storage System and Renewable Energy Sources. EAI Endorsed Transactions on Energy Web 2018 .
AMA StyleJ.G. Pinto, Vitor Monteiro, Bruno Exposto, Luis A. M. Barros, Tiago J.C. Sousa, L.F.C. Monteiro, João L. Afonso. Power Electronics Converters for an Electric Vehicle Fast Charging Station with Energy Storage System and Renewable Energy Sources. EAI Endorsed Transactions on Energy Web. 2018; ():.
Chicago/Turabian StyleJ.G. Pinto; Vitor Monteiro; Bruno Exposto; Luis A. M. Barros; Tiago J.C. Sousa; L.F.C. Monteiro; João L. Afonso. 2018. "Power Electronics Converters for an Electric Vehicle Fast Charging Station with Energy Storage System and Renewable Energy Sources." EAI Endorsed Transactions on Energy Web , no. : .
André Leopoldino; Cleiton Freitas; Luís Fernando Corrêa Monteiro. On the effects of hyper-parameters adjustments to the PSO-GMPPT algorithm for a photovoltaic system under partial shading conditions. EAI Endorsed Transactions on Energy Web 2018, 1 .
AMA StyleAndré Leopoldino, Cleiton Freitas, Luís Fernando Corrêa Monteiro. On the effects of hyper-parameters adjustments to the PSO-GMPPT algorithm for a photovoltaic system under partial shading conditions. EAI Endorsed Transactions on Energy Web. 2018; ():1.
Chicago/Turabian StyleAndré Leopoldino; Cleiton Freitas; Luís Fernando Corrêa Monteiro. 2018. "On the effects of hyper-parameters adjustments to the PSO-GMPPT algorithm for a photovoltaic system under partial shading conditions." EAI Endorsed Transactions on Energy Web , no. : 1.
This paper presents a low-cost IGBT driver for single-phase full-bridge converter, including a dead time circuit. The IGBT model corresponds to GA75Ts120U from International Rectifier. It is important to highlight that, in essence, the IGBT driver was implemented with discrete components, which considerably decreases its cost in comparison to the similar circuits available in the market. Simulation- and experimental-results of the implemented converter are provided to evaluate the performance of the IGBT driver.
Nayara V. Oliveira; Cleiton M. Freitas; Luís Fernando Corrêa Monteiro. Low-cost IGBT driver for single-phase full-bridge converter. 2018 Simposio Brasileiro de Sistemas Eletricos (SBSE) 2018, 1 -6.
AMA StyleNayara V. Oliveira, Cleiton M. Freitas, Luís Fernando Corrêa Monteiro. Low-cost IGBT driver for single-phase full-bridge converter. 2018 Simposio Brasileiro de Sistemas Eletricos (SBSE). 2018; ():1-6.
Chicago/Turabian StyleNayara V. Oliveira; Cleiton M. Freitas; Luís Fernando Corrêa Monteiro. 2018. "Low-cost IGBT driver for single-phase full-bridge converter." 2018 Simposio Brasileiro de Sistemas Eletricos (SBSE) , no. : 1-6.
This study presents a technique to locate the source of faults in distribution systems, i.e. to pinpoint where the fault has occurred along the distribution system. More specifically, it localises the origin of short duration voltage variations (SDVVs) in a distribution system. Fault location (its origin) is estimated solely from the voltage waveforms during the fault. More specifically, the energies of the instantaneous symmetrical components corresponding to the voltage waveforms are used to estimate the fault location. The proposed localisation strategy considers that the signal records during a fault are captured at the feeder start node and at other nodes scattered along the distribution systems. Simulation results show the feasibility of the proposed technique to accurately localise the origin of faults in distribution systems.
Tiago Fernandes Moraes; Lisandro Lovisolo; Luís Fernando Corrêa Monteiro. Fault location in distribution systems from analysis of the energy of sequence component waveforms. IET Generation, Transmission & Distribution 2018, 12, 1951 -1960.
AMA StyleTiago Fernandes Moraes, Lisandro Lovisolo, Luís Fernando Corrêa Monteiro. Fault location in distribution systems from analysis of the energy of sequence component waveforms. IET Generation, Transmission & Distribution. 2018; 12 (9):1951-1960.
Chicago/Turabian StyleTiago Fernandes Moraes; Lisandro Lovisolo; Luís Fernando Corrêa Monteiro. 2018. "Fault location in distribution systems from analysis of the energy of sequence component waveforms." IET Generation, Transmission & Distribution 12, no. 9: 1951-1960.
This paper proposes a fast response One-Cycle Control (OCC) strategy for three-phase shunt active power filter. A comprehensive study of the OCC technique, exploiting their features and inherent drawbacks to provide a better understanding of this technique is presented. Simulation results of the active power filter with the conventional and proposed OCC strategies are shown in order to evaluate the performances of both for harmonics and power factor compensation of a nonlinear load. Experimental results are carried out and compared with the theoretical prediction.
Aluisio A. M. Bento; Luís Fernando Corrêa Monteiro; Edison R. C. Da Silva. Fast response one-cycle control strategy for three-phase shunt active power filter. 2017 IEEE Southern Power Electronics Conference (SPEC) 2017, 1 -7.
AMA StyleAluisio A. M. Bento, Luís Fernando Corrêa Monteiro, Edison R. C. Da Silva. Fast response one-cycle control strategy for three-phase shunt active power filter. 2017 IEEE Southern Power Electronics Conference (SPEC). 2017; ():1-7.
Chicago/Turabian StyleAluisio A. M. Bento; Luís Fernando Corrêa Monteiro; Edison R. C. Da Silva. 2017. "Fast response one-cycle control strategy for three-phase shunt active power filter." 2017 IEEE Southern Power Electronics Conference (SPEC) , no. : 1-7.
This work presents a comprehensive study of the One Cycle Control (OCC) technique. Initially, the stability of such technique through empirical and formal demonstrations is introduced. Features and inherent drawbacks are presented to provide a better understanding of such technique. Proposals for minimizing some of the discussed drawbacks are presented and, moreover, there are also proposals to reduce the number of devices and cost of the ordinary OCC control circuitry. Finally, applications of OCC technique to Power Factor Correction Rectifier (PFC), Grid Connected Inverter (GCI), and Active Power Filter (APF) are presented and verified with simulation essays to evaluate the control performance. Preliminary experimental results are carried out and compared with the theoretical prediction.
Aluisio A. M. Bento; Luís Fernando Corrêa Monteiro. Considerations on one cycle control technique. 2017 Brazilian Power Electronics Conference (COBEP) 2017, 1 -7.
AMA StyleAluisio A. M. Bento, Luís Fernando Corrêa Monteiro. Considerations on one cycle control technique. 2017 Brazilian Power Electronics Conference (COBEP). 2017; ():1-7.
Chicago/Turabian StyleAluisio A. M. Bento; Luís Fernando Corrêa Monteiro. 2017. "Considerations on one cycle control technique." 2017 Brazilian Power Electronics Conference (COBEP) , no. : 1-7.
This work proposes a Fast Response One Cycle Control (OCC) strategy for Active Power Filters (FOCC-APF). Moreover, a comprehensive study of the OCC technique, exploiting their features and inherent drawbacks to provide a better understanding of this technique is presented. Finally, simulation results of the active power filter with the conventional and proposed strategies are shown to evaluate APF performance for harmonics and power factor compensation. Preliminary experimental results are carried out and compared with the theoretical prediction.
Aluisio Alves De Melo Bento; Luís Fernando Corrêa Monteiro. Fast response one cycle control strategy for APF. 2017 IEEE URUCON 2017, 1 -5.
AMA StyleAluisio Alves De Melo Bento, Luís Fernando Corrêa Monteiro. Fast response one cycle control strategy for APF. 2017 IEEE URUCON. 2017; ():1-5.
Chicago/Turabian StyleAluisio Alves De Melo Bento; Luís Fernando Corrêa Monteiro. 2017. "Fast response one cycle control strategy for APF." 2017 IEEE URUCON , no. : 1-5.
In this paper, a modulation technique is proposed by combining selective harmonic elimination (SHE-PWM) and an optimized procedure with genetic algorithms (GA). The purpose is to mitigate individual harmonic components (5 th , 7 th , 11 th , 13 th ), reduce total harmonic distortion (THD%), control the amplitude modulation index (m a ) and frequency of the output fundamental component, while complying with the Brazilian grid codes. The GA determines three best fitted switching angles, by means of five evaluation or cost functions: one is proposed and other four ones are existing formulas obtained from the literature. Moreover, this optimized SHE-PWM based GA is applied to a proposed modular seven-level multilevel inverter (7-level MLC 2 ), which is based on the modular five-level MLC 2 (5-level MLC 2 ) topology. In this new circuit arrangement the neutral-point-clamped (NPC) technology based three-level switch leg, very well known in industry, is applied, and reduced number of switch count is achieved, when compared with classical NPC counterpart. Filterless operation and compliance with grid codes are evaluated by simulation results.
J. A. De Almeida; M. D. Bellar; Luís Fernando Corrêa Monteiro; J. F. M. Do Amaral; P. Rodríguez. Selective harmonic elimination for modular 5-level MLC2topology based 7-level inverter by using genetic algorithms. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society 2016, 3594 -3599.
AMA StyleJ. A. De Almeida, M. D. Bellar, Luís Fernando Corrêa Monteiro, J. F. M. Do Amaral, P. Rodríguez. Selective harmonic elimination for modular 5-level MLC2topology based 7-level inverter by using genetic algorithms. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society. 2016; ():3594-3599.
Chicago/Turabian StyleJ. A. De Almeida; M. D. Bellar; Luís Fernando Corrêa Monteiro; J. F. M. Do Amaral; P. Rodríguez. 2016. "Selective harmonic elimination for modular 5-level MLC2topology based 7-level inverter by using genetic algorithms." IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society , no. : 3594-3599.
Recently, it has been shown that complementarity models are an attracting tool for representing power converters in both open- and closed-loop configuration. A unique dynamical complementarity model captures all the modes of a power converter, without assuming the a priori knowledge of the sequence of modes or of the switching time instants. In this paper, we derive the complementarity model of a single-phase active filter with cascaded multilevel inverter. A combination of the unipolar and the phase-disposition PWM techniques is used with the goal of regulating the dc-link voltage. As benchmark for comparison, the time evolution of inductors currents and capacitors voltages computed with the complementarity procedure is compared with the ones obtained with PSIM software.
Valentina Sessa; Luís Fernando Corrêa Monteiro; Douglas M. Dias. A single-phase active filter with cascaded multilevel inverter modelled as a complementarity problem. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society 2016, 1075 -1080.
AMA StyleValentina Sessa, Luís Fernando Corrêa Monteiro, Douglas M. Dias. A single-phase active filter with cascaded multilevel inverter modelled as a complementarity problem. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society. 2016; ():1075-1080.
Chicago/Turabian StyleValentina Sessa; Luís Fernando Corrêa Monteiro; Douglas M. Dias. 2016. "A single-phase active filter with cascaded multilevel inverter modelled as a complementarity problem." IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society , no. : 1075-1080.
This paper addresses a novel control algorithm for a selective active filter compensating specific harmonic currents and the fundamental negative-sequence component of the load current. The proposed control algorithm combines the resonant controller with a PLL circuit to determine the current references in αβ frame. Previous works introduced control algorithms for a selective active filter connected to radial grid, in dq frame, where the load currents were no longer used to determine the current references. However the transient performance of the active filter was compromised, once the current references are indirectly determined and, moreover, due to the presence of low-pass filters. Now, this work proposes an algorithm where the low-pass filters is removed, therefore the overall control algorithm becomes simpler to be implemented with the active filter presenting a faster transient response. Simulation results are presented to evaluate the proposed algorithm with the active filter compensating symmetrical harmonic currents under transient- and steady-state conditions.
Cleiton M. Freitas; Luís Fernando Corrêa Monteiro; Edson H. Watanabe. A novel current harmonic compensation based on resonant controllers for a selective active filter. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society 2016, 3666 -3671.
AMA StyleCleiton M. Freitas, Luís Fernando Corrêa Monteiro, Edson H. Watanabe. A novel current harmonic compensation based on resonant controllers for a selective active filter. IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society. 2016; ():3666-3671.
Chicago/Turabian StyleCleiton M. Freitas; Luís Fernando Corrêa Monteiro; Edson H. Watanabe. 2016. "A novel current harmonic compensation based on resonant controllers for a selective active filter." IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society , no. : 3666-3671.
This study presents control algorithms for a new unified power quality conditioner (UPQC) without the series transformers that are frequently used to make the insertion of the series converter of the UPQC between the power supply and the load. The behaviour of the proposed UPQC is evaluated in presence of voltage imbalances, as well as under non-sinusoidal voltage-and current conditions. The presented algorithms derive from the concepts involving the active and non-active currents, together with a phase-locked-loop circuit. Based on these real-time algorithms, and considering the proposed hardware topology, the UPQC is able to compensate the harmonic components of the voltages and currents, correct the power factor, and keep the load voltages regulated, all of this in a dynamic way, responding instantaneously to changes in the loads or in the electrical power system. The control algorithms were distributed in a two-DSP digital control architecture, without any communication between them. Consequently, can be increased the sampling frequency of the acquired voltages and currents and improve the UPQC performance. Furthermore, some constraints of the proposed UPQC are evidenced, particularly when the main voltages are imbalanced. Simulation and experimental results are presented to verify the UPQC performance under transient and steady state conditions.
Luis Fernando Correa Monteiro; Mauricio Aredes; Jose Gabriel Pinto; Bruno Fernandes Exposto; Joao Luiz Afonso. Control algorithms based on the active and non‐active currents for a UPQC without series transformers. IET Power Electronics 2016, 9, 1985 -1994.
AMA StyleLuis Fernando Correa Monteiro, Mauricio Aredes, Jose Gabriel Pinto, Bruno Fernandes Exposto, Joao Luiz Afonso. Control algorithms based on the active and non‐active currents for a UPQC without series transformers. IET Power Electronics. 2016; 9 (9):1985-1994.
Chicago/Turabian StyleLuis Fernando Correa Monteiro; Mauricio Aredes; Jose Gabriel Pinto; Bruno Fernandes Exposto; Joao Luiz Afonso. 2016. "Control algorithms based on the active and non‐active currents for a UPQC without series transformers." IET Power Electronics 9, no. 9: 1985-1994.