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Mauricio B. R. Correa

Bio: Mauricio B. R. Correa is an academic researcher from Federal University of Campina Grande. The author has contributed to research in topics: Converters & Three-phase. The author has an hindex of 14, co-authored 90 publications receiving 674 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors present a literature overview of power decoupling in single-phase applications and present the best reference on this topic, which can be implemented as series or parallel with respect to the ac, dc or link side.
Abstract: This paper presents a literature overview of all techniques proposed until the submission of this paper in terms of mitigating power oscillation in single-phase applications. This pulsating energy is the major factor for increasing the size of passive components and power losses in the converter and can be responsible for losses or malfunctioning of the dc sources. Reduction of power ripple at twice the fundamental frequency is one of the key elements to increase power converter density without lack of dc stiffness. Pulsation reduction is achieved by incorporating control techniques or auxiliary circuitries with energy storage capability in reactive elements to avoid this oscillating power to propagate through the converter, creating what is called as single-phase power decoupling. The topologies are divided as: rectifiers, inverters, and bidirectional. Among them, it is possible to classify as isolated and nonisolated converters. The energy storage method may be classify as: capacitive and inductive. For the power decoupling technique, it is convenient to divide as control and topology. The power decoupling technique may be implemented as series or parallel with respect to the ac, dc or link side. This paper represents the best reference on this topic.

165 citations

Journal ArticleDOI
TL;DR: In this paper, a shuffled complex evolution (SCE) technique was used for extracting the intrinsic parameters of a photovoltaic (PV) generator by using shuffled complexity evolution (SCE) technique for a double-diode PV model.
Abstract: This paper proposes a method for extracting the intrinsic parameters of a photovoltaic (PV) generator by using shuffled complex evolution (SCE) technique for a double-diode PV model. The characteristic equation of a double-diode PV presents a nonlinear behavior and the determination of the intrinsic parameters from a $I \times V$ experimental curve requires the use of nonlinear optimization methods. To evaluate the accuracy of the SCE technique for extracting the intrinsic PV parameters, a comparison with other well-known methods is presented; in particular, analytic method, Levenberg–Marquardt, genetic algorithms (GA), differential evolution (DE), and particle swarm optimization (PSO) are considered. This comparison is performed by using statistical analysis and by estimating the relative error of parameter values; it has been applied to an unknown PV module and to a known PV cell. The obtained results showed that, compared with other evolutionary methods (GA, DE and PSO), the SCE presents the lowest computational time and requires less iterations/generations to converge. All the results prove that the proposed method is feasible, faster, and presents better results than the conventional ones.

62 citations

Journal ArticleDOI
TL;DR: This paper presents a complete comparative study about the five most common configurations of shunt active power filter applied to four-wire distribution systems and shows that structures with fourth inductor generate higher number of levels at output converter voltage when they operate by compensating high levels of zero-sequence harmonics.
Abstract: This paper presents a complete comparative study about the five most common configurations of shunt active power filter applied to four-wire distribution systems. In order to evaluate the applicability of the studied topologies, two scenarios of four-wire loads are investigated differing by level of zero-sequence harmonic contents. The analysis of simulation steady-state results comprise dc-link capacitor voltage and current stresses, harmonic distortion in grid currents, and semiconductor losses. The results show that structures with fourth inductor generate higher number of levels at output converter voltage. However, when they operate by compensating high levels of zero-sequence harmonics, they can present higher dc-link voltage and lower efficiency. Furthermore, system models, control strategy, and experimental results are presented as well.

55 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a technique to reduce the low-frequency dc-link energy oscillation due to the pulsating single-phase energy flow in a single phase-to-single-phase voltage source converter and current source converter (CSC), which operate connected to the grid.
Abstract: This paper proposes a technique to reduce the low-frequency dc-link energy oscillation due to the pulsating single-phase energy flow in a single-phase-to-single-phase voltage source converter (VSC) and current source converter (CSC), which operate connected to the grid. This pulsating energy is the major factor for increasing the size of the passive components and power losses in the converter. Pulsation reduction is achieved by incorporating two auxiliary active switches and one passive energy storage element to the rectifier and inverter sides. Additionally, this paper presents the comparison of these converters (VSC/CSC) regarding efficiency and power density. Details of the control strategy are presented. Simulation and experimental results are provided to validate the theoretical approach.

34 citations

Proceedings ArticleDOI
04 Dec 2009
TL;DR: In this paper, the role of batteries is replaced by fluid storage and steady state operation depends on the amount of available power, and the evaluation of all system devices, for each processed power level, allow to conclude about their efficiency and to clarify how they can be controlled to make the whole system operate at maximum efficiency level.
Abstract: Photovoltaic pumping is one of the most interesting applications for distributed energy generation. Despite that, cost still a concern, when compared with others energy resources. Therefore, efficiency improvement can be seen as one way for cost reduction. Use of maximum power point tracker allows generating more energy with the same amount of panels, which means more energy per panel. Nevertheless, the whole power processing has more than panels. It also includes converters, inverter, electrical motor, pump and batteries, which store energy for further use during solar outrage. The aim of this paper is to show how to achieve an effective photovoltaic pumping system without batteries. In this solution the role of batteries are replaced by fluid storage and, steady state operation depends on the amount of available power. Evaluations of all system devices, for each processed power level, allow to conclude about their efficiency and to clarify how they can be controlled to make the whole system operates at maximum efficiency level. Experimental results help to show how a photovoltaic pumping system can be improved in terms of efficiency.

29 citations


Cited by
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Journal ArticleDOI
Yao Sun1, Yonglu Liu1, Mei Su1, Wenjing Xiong1, Jian Yang1 
TL;DR: In this paper, the authors provide a comprehensive review of active power decoupling circuit topologies and their development laws from the view of the dual principle, switch sharing, and differential connection.
Abstract: Active power decoupling methods are developed to deal with the inherent ripple power at twice the grid frequency in single-phase systems generally by adding active switches and energy storage units. They have obtained a wide range of applications, such as photovoltaic (PV) systems, light-emitting diodes (LEDs) drivers, fuel cell (FC) power systems, and electric vehicle (EV) battery chargers, etc. This paper provides a comprehensive review of active power decoupling circuit topologies. They are categorized into two groups in terms of the structure characteristics: independent and dependent decoupling circuit topologies. The former operates independently with the original converter, and the latter, however, shares the power semiconductor devices with the original converter partially and even completely. The development laws for the active power decoupling topologies are revealed from the view of “duality principle,” “switches sharing,” and “differential connection.” In addition, the exceptions and special cases are also briefly introduced. This paper is targeted to help researchers, engineers, and designers to construct some new decoupling circuit topologies and properly select existing ones according to the specific application.

395 citations

Journal ArticleDOI
TL;DR: Experimental and comparison results comprehensively demonstrate that IWOA is significantly better than the original WOA and three advanced variants of WOA, and is also highly competitive with the reported results of some recently-developed parameter extraction methods.

238 citations

Journal ArticleDOI
TL;DR: This paper aims to undertake a comprehensive review on meta-heuristic algorithms and related variants which have been applied on PV cell parameter identification and presents some perspectives and recommendations for future development.

212 citations

Journal ArticleDOI
TL;DR: In this article, the authors proposed a new converter for photovoltaic (PV) water pumping or treatment systems without the use of chemical storage elements, such as batteries, to achieve a more efficient, reliable, maintenance-free, and cheaper solution than the standard ones that use dc motors or lowvoltage synchronous motors.
Abstract: This paper proposes a new converter for photovoltaic (PV) water pumping or treatment systems without the use of chemical storage elements, such as batteries. The converter is designed to drive a three-phase induction motor directly from PV energy. The use of a three-phase induction motor presents a better solution to the commercial dc motor water pumping system. The development is oriented to achieve a more efficient, reliable, maintenance-free, and cheaper solution than the standard ones that use dc motors or low-voltage synchronous motors. The developed system is based on a current-fed multiresonant converter also known as resonant two-inductor boost converter (TIBC) and a full-bridge three-phase voltage source inverter (VSI). The classic topology of the TIBC has features like high voltage gain and low input current ripple. In this paper, it is further improved with the use of a nonisolated recovery snubber along with a hysteresis controller and the use of a constant duty cycle control to improve its efficiency. Experimental results show a peak efficiency of 91% at a rated power of 210 W for the dc/dc converter plus the three-phase VSI and a peak efficiency of 93.64% just for the dc/dc converter. The system is expected to have a high lifetime due to the inexistence of electrolytic capacitors, and the total cost of the converter is below 0.43 U$/Wp. As a result, the system is a promising solution to be used in isolated locations and to deliver water to poor communities.

178 citations

Journal ArticleDOI
TL;DR: The prominent reactive power coordination and optimization algorithms are critically examined and discussed in this paper and some important technical recommendations for the power industry, policymakers, and academic researchers are enlisted.
Abstract: Power electronic converter (PEC)-interfaced renewable energy generators (REGs) are increasingly being integrated to the power grid. With the high renewable power penetration levels, one of the key power system parameters, namely reactive power, is affected, provoking steady-state voltage and dynamic/transient stability issues. Therefore, it is imperative to maintain and manage adequate reactive power reserve to ensure a stable and reliable power grid. This paper presents a comprehensive literature review on the reactive power management in renewable rich power grids. Reactive power requirements stipulated in different grid codes for REGs are summarized to assess their adequacy for future network requirements. The PEC-interfaced REGs are discussed with a special emphasis on their reactive power compensation capability and control schemes. Along with REGs, conventional reactive power support devices (e.g., capacitor banks) and PEC-interfaced reactive power support devices (e.g., static synchronous compensators) play an indispensable role in the reactive power management of renewable rich power grids, and thus their reactive power control capabilities and limitations are thoroughly reviewed in this paper. Then, various reactive power control strategies are reviewed with a special emphasis on their advantages/disadvantages. Reactive power coordination between support devices and their optimal capacity are vital for an efficient and stable management of the power grid. Accordingly, the prominent reactive power coordination and optimization algorithms are critically examined and discussed in this paper. Finally, the key issues pertinent to the reactive power management in renewable rich power grids are enlisted with some important technical recommendations for the power industry, policymakers, and academic researchers.

172 citations