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Leonardo Poltronieri Sampaio - One of the best experts on this subject based on the ideXlab platform.
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dynamic performance comparison involving grid connected pv systems operating with Active Power line conditioning and subjected to sudden solar irradiation changes
Iet Renewable Power Generation, 2019Co-Authors: Marcelo Hideo De Freitas Takami, Sergio Augusto Oliveira Da Silva, Leonardo Poltronieri SampaioAbstract:This study presents a comparative performance analysis involving single- and double-stage photovoltaic (PV) systems, which are connected to a three-phase four-wire electrical system by means of a four-leg inverter topology. The double-stage PV system is composed of a step-up DC/DC converter and a four-leg grid-connected inverter, while in the single-stage PV system the PV array is directly connected to the inverter DC bus. In addition to the Active Power Injection into the grid, both PV systems have two attrActive features, described as follows: (i) Power quality improvement due to their capability to perform Active Power-line conditioning, such as load harmonic current suppression, reActive Power compensation, and load unbalance compensation; (ii) dynamic improvement in the occurrence of abrupt solar irradiation variations, which is achieved through the implementation of a feed-forward control loop (FFCL) acting directly in the inverter DC-bus voltage control loop, resulting in speeding up of the dynamics of both the DC-bus voltage and the injected grid-inverter currents. The referred comparative analysis addresses the static and dynamic performances considering the PV systems operating under the action of the FFCL, as well as performing Active Power-line conditioning. Simulation and experimental results are presented to evaluate and validate the proposed study.
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grid tied photovoltaic system based on pso mppt technique with Active Power line conditioning
Iet Power Electronics, 2016Co-Authors: Fernando Oliveira, Sergio Augusto Oliveira Da Silva, Leonardo Poltronieri Sampaio, Fabio Renan Durand, Vinicius Dario Bacon, Leonardo Bruno Garcia CampanholAbstract:This study presents a single-phase grid-tied photovoltaic (PV) system based on a global maximum Power point tracking (MPPT) technique, which is performed by means of the particle swarm optimisation (PSO) method. The PSO-based MPPT technique is employed to solve problems related to mismatching phenomena, such as partial shading, in which the PV arrays are commonly submitted. Considering the search of the global maximum Power point under partial shading, the effectiveness of the PSO-based MPPT technique is highlighted when compared with the well-known perturb and observe MPPT technique, since both the mentioned MPPT techniques are used to determine the dc-bus voltage reference to ensure a proper grid-tied inverter operation. A current generator algorithm based on a synchronous reference frame is proposed, which operates in conjunction with a dc-bus controller and MPPT algorithms, computing the reference current of the grid-tied inverter. In addition, the current generator controls the energy processed by the PV system to avoid over Power rating of the grid-tied inverter, since the Active Power Injection into the grid, reActive Power compensation and harmonic currents suppression are carried out simultaneously. The performance and feasibility of the grid-tied PV system are evaluated by means of simulation and experimental results.
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grid tie three phase inverter with Active Power Injection and reActive Power compensation
Renewable Energy, 2016Co-Authors: Leonardo Poltronieri Sampaio, Moacyr A G De Brito, Guilherme De Azevedo E Melo, Carlos A CanesinAbstract:This paper proposes a methodology for the Active and reActive Power flow control, applied to a grid-tie three-phase Power inverter, considering local and/or regionalized Power flow control necessity in the forthcoming distributed generation scenario. The controllers are designed by means of robust pole placement technique, which is determined using the Linear Matrix Inequalities with D-stability criteria. The linearized models used in the control design are obtained by means of feedback linearization, aiming to reduce system nonlinearities, improve the controller's performance and mitigate potential disturbances. Through multi-loop control, the Power loop uses Active and reActive Power transfer adapted expressions to obtain the magnitude of the voltage and Power transfer angle to control the Power flow between the distributed generation and the utility grid. The methodology main idea is to obtain the best controllers with the lowest gains as possible placing the poles in the left-half s-plane region, resulting in fast responses with reduced oscillations. In order to demonstrate the feasibility of the proposal a 3 kVA three-phase prototype was implemented and a comparison with conventional controller is performed to demonstrate the proposed methodology performance. In addition, anti-islanding detection and protection against over/under voltage and frequency deviations are demonstrated through experimental results.
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a grid connected photovoltaic Power system with Active Power Injection reActive Power compensation and harmonic filtering
Brazilian Power Electronics Conference, 2013Co-Authors: Leonardo Bruno Garcia Campanhol, Sergio Augusto Oliveira Da Silva, Leonardo Poltronieri Sampaio, Azauri Albano De OliveiraAbstract:This paper presents a study of a single-phase photovoltaic system, which is connected to the utility grid by means of a full-bridge DC/AC converter. The grid-connected system has Active Power Injection ability from photovoltaic panels. Simultaneously, it performs reActive Power compensation and harmonic current suppression generated by nonlinear loads. The photovoltaic system is implemented utilizing an equivalent electric model proposed in the literature. The algorithm adopted to obtain the current reference of the DC/AC converter is based on the synchronous reference frame (SRF), which is implemented along with a maximum Power tracking technique. Simulation results are present to validate the proposed control strategy, as well as to verify the system feasibility.
Manchung Wong - One of the best experts on this subject based on the ideXlab platform.
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multifunctional hybrid structure of svc and capacitive grid connected inverter svc cgci for Active Power Injection and nonActive Power compensation
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the structure, coordinate control method, and parameter design of a hybrid system are proposed for Active Power Injection and nonActive Power (reActive, harmonic, and unbalance Power) compensation. The proposed hybrid system consists of a static var compensator (SVC) in parallel with a capacitive-coupling grid-connected inverter (CGCI) (SVC//CGCI). In SVC//CGCI, the SVC part is used to dynamic compensate the reActive Power and unbalance Power, while the low rating CGCI part is used to inject Active Power, provide harmonic Power and a fixed amount of capacitive reActive Power. Compared with conventional inductive-coupling grid-connected inverter (IGCI), the CGCI can provide Active, reActive and harmonic Power with low rating of Active inverter part. The cost of the SVC part is much lower than that of Active inverter part, thus the reduction of inverter rating can lead to a decrease in the total cost of the SVC//CGCI. Therefore, the SVC//CGCI can be a cost effective solution for Active Power Injection and nonActive Power compensation. Finally, simulation and experimental results are provided to show the advantages and validity of the proposed SVC//CGCI in compared with the conventional IGCI and SVC//IGCI.
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comparisons of different hybrid inverters for Power quality compensation with without Active Power Injection
Conference of the Industrial Electronics Society, 2018Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the comparisons of different hybrid inverters are provided for Power quality compensation and/or Active inverter Injection. In detail, the characteristics are compared for inductive coupling grid connected inverter (IGCI), capacitive coupling grid connected inverter (CGCI), static var compensator (SVC) in parallel with a CGCI (SVC//CGCI), and hybrid grid connected inverter (HGCI). The comparisons are separately provided for two applications: 1) Power quality compensation 2) both Power quality compensation and Active Power Injection. In this paper, the circuit configurations of different inverters are proposed firstly. Then, the design of each hybrid inverters is provided. After that, the comparisons are provided for above mentioned applications. Finally, the simulation results are provided to verify the characteristics of different hybrid inverters.
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capacitive coupled grid connected inverter with Active Power Injection ability
International Power Electronics and Motion Control Conference, 2012Co-Authors: Wenchen Zhang, Manchung Wong, Ningyi Dai, Chikong WongAbstract:The capacitive-coupled grid-connected inverter (CGCI) system is proposed in this paper. It can reduce the Active Power from the grid by injecting Active Power from the PV generators into the grid. The reActive Power and harmonic compensation ability of the CGCI leads to reduced root-mean-square (RMS) value of source current and thus reduced residential Power loss. The proposed CGCI and conventional inductive-coupled grid-connected inverter (IGCI) are compared. Results indicate that CGCI can achieve the required Power delivery with lower inverter voltage rating. The proposed CGCI is utilized to integrate a PV generation system to the grid. Besides, reActive Power and harmonic compensation is achieved simultaneously when the Active Power is injected. A dynamic reActive Power adjustment block is added to the control system of the CGCI, which can improve its performance when the required reActive Power compensation exceeds its control capability. Simulation results are provided to verify the validity of the CGCI and its control system.
Peter Palensky - One of the best experts on this subject based on the ideXlab platform.
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Power Hardware-in-the-Loop-Based Performance Analysis of Different Converter Controllers for Fast Active Power Regulation in Low-Inertia Power Systems
'MDPI AG', 2021Co-Authors: Jose Rueda Torres, Peter Palensky, Elyas Rakhshani, Zameer Ahmad, Nidarshan Veera Kumar, Ebrahim Adabi, Mart Van Der MeijdenAbstract:Future electrical Power systems will be dominated by Power electronic converters, which are deployed for the integration of renewable Power plants, responsive demand, and different types of storage systems. The stability of such systems will strongly depend on the control strategies attached to the converters. In this context, laboratory-scale setups are becoming the key tools for prototyping and evaluating the performance and robustness of different converter technologies and control strategies. The performance evaluation of control strategies for dynamic frequency support using fast Active Power regulation (FAPR) requires the urgent development of a suitable Power hardware-in-the-loop (PHIL) setup. In this paper, the most prominent emerging types of FAPR are selected and studied: droop-based FAPR, droop derivative-based FAPR, and virtual synchronous Power (VSP)-based FAPR. A novel setup for PHIL-based performance evaluation of these strategies is proposed. The setup combines the advanced modeling and simulation functions of a real-time digital simulation platform (RTDS), an external programmable unit to implement the studied FAPR control strategies as digital controllers, and actual hardware. The hardware setup consists of a grid emulator to recreate the dynamic response as seen from the interface bus of the grid side converter of a Power electronic-interfaced device (e.g., type-IV wind turbines), and a mockup voltage source converter (VSC, i.e., a device under test (DUT)). The DUT is virtually interfaced to one high-voltage bus of the electromagnetic transient (EMT) representation of a variant of the IEEE 9 bus test system, which has been modified to consider an operating condition with 52% of the total supply provided by wind Power generation. The selected and programmed FAPR strategies are applied to the DUT, with the ultimate goal of ascertaining its feasibility and effectiveness with respect to the pure software-based EMT representation performed in real time. Particularly, the time-varying response of the Active Power Injection by each FAPR control strategy and the impact on the instantaneous frequency excursions occurring in the frequency containment periods are analyzed. The performed tests show the degree of improvements on both the rate-of-change-of-frequency (RoCoF) and the maximum frequency excursion (e.g., nadir)
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implementation and performance assessment of fast Active Power Injection method for type 4 wind turbine based on real time simulation
2019 2nd International Conference on Smart Grid and Renewable Energy (SGRE), 2019Co-Authors: Elyas Rakhshani, Nidarshan Veerakumar, Zameer Ahmad, Jose Luis Rueda Torres, Mart A M M Van Der Meijden, Peter PalenskyAbstract:This paper deals with the implementation of a Fast Active Power Injection (FAPI) controller in a Type-4 Wind Turbine. Two different FAPI controllers, droop-based and a modified derivative-based controller are proposed and investigated under real-time simulation platform. The implementation is done in a Real-Time Digital Simulator (RTDS) by using the functionalities of RSCAD software. The IEEE 9 bus system is taken as a case study to quantitatively check the suitability of the implemented controller. The response of the wind turbine observed in EMT simulations is compared against the response obtained via numerical simulations with a generic wind turbine model built-in DIg SILENT PowerFactory software. The details of the model implemented in RSCAD provides better insight on capturing the impacts of controller parameters. Obtained results clearly demonstrate how the proposed controller can effectively improve the dynamic frequency performance of the Power system.
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quantification and mitigation of unfairness in Active Power curtailment of rooftop photovoltaic systems using sensitivity based coordinated control
Energies, 2016Co-Authors: Aadil Latif, Wolfgang Gawlik, Peter PalenskyAbstract:With increasing photovoltaic (PV) penetration in low voltage networks (LVNs), voltage regulation is a challenge. Active Power curtailment (APC) is one possible solution for mitigating over voltages resulting from Active Power Injection in LVNs. There is an inherent unfairness in the APC scheme. When generation is high and consumption is low, the voltages at the end of the feeder tend to be the highest. This results in high curtailment of Active Power output of the inverters located at the end of the feeder and low or even no curtailment for the inverts located closer to the transformer. A secondary voltage controller has been implemented to mitigate this unfairness in APC based voltage support schemes. The focus of this work is to quantify this unfairness and develop methods that enable residential PV owners serviced by the same feeder to participate equally in voltage regulation in the LVN.
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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multifunctional hybrid structure of svc and capacitive grid connected inverter svc cgci for Active Power Injection and nonActive Power compensation
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the structure, coordinate control method, and parameter design of a hybrid system are proposed for Active Power Injection and nonActive Power (reActive, harmonic, and unbalance Power) compensation. The proposed hybrid system consists of a static var compensator (SVC) in parallel with a capacitive-coupling grid-connected inverter (CGCI) (SVC//CGCI). In SVC//CGCI, the SVC part is used to dynamic compensate the reActive Power and unbalance Power, while the low rating CGCI part is used to inject Active Power, provide harmonic Power and a fixed amount of capacitive reActive Power. Compared with conventional inductive-coupling grid-connected inverter (IGCI), the CGCI can provide Active, reActive and harmonic Power with low rating of Active inverter part. The cost of the SVC part is much lower than that of Active inverter part, thus the reduction of inverter rating can lead to a decrease in the total cost of the SVC//CGCI. Therefore, the SVC//CGCI can be a cost effective solution for Active Power Injection and nonActive Power compensation. Finally, simulation and experimental results are provided to show the advantages and validity of the proposed SVC//CGCI in compared with the conventional IGCI and SVC//IGCI.
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comparisons of different hybrid inverters for Power quality compensation with without Active Power Injection
Conference of the Industrial Electronics Society, 2018Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the comparisons of different hybrid inverters are provided for Power quality compensation and/or Active inverter Injection. In detail, the characteristics are compared for inductive coupling grid connected inverter (IGCI), capacitive coupling grid connected inverter (CGCI), static var compensator (SVC) in parallel with a CGCI (SVC//CGCI), and hybrid grid connected inverter (HGCI). The comparisons are separately provided for two applications: 1) Power quality compensation 2) both Power quality compensation and Active Power Injection. In this paper, the circuit configurations of different inverters are proposed firstly. Then, the design of each hybrid inverters is provided. After that, the comparisons are provided for above mentioned applications. Finally, the simulation results are provided to verify the characteristics of different hybrid inverters.
Chiseng Lam - One of the best experts on this subject based on the ideXlab platform.
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design of proportional integral controller of hybrid grid connected inverter for Active Power Injection and unbalanced non Active Power compensation
Conference of the Industrial Electronics Society, 2019Co-Authors: Waikit Sou, Cheng Gong, Chiwa Chao, Chiseng LamAbstract:With the characteristics of a low dc-link operating voltage of the Active inverter part and thyristor controlled passive part, the hybrid-coupling grid-connected inverter (HGCI) can reduce the system and operational costs as well as extend the operational range compared with the conventional inductive-coupling grid-connected inverter (IGCI) and capacitive-coupling grid-connected inverter (CGCI) for the renewable energy generation. In this paper, a control strategy by using proportional-integral (PI) controller of the HGCI for Active Power Injection and unbalanced non-Active Power compensation will be proposed and presented, which can reduce the switching current ripple and obtain better Active and non-Active Power compensation compared with the conventional hysteresis current controller. Finally, simulation and experimental results are provided to verify the performance of the designed PI controller for the HGCI under unbalanced loads operation.
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multifunctional hybrid structure of svc and capacitive grid connected inverter svc cgci for Active Power Injection and nonActive Power compensation
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the structure, coordinate control method, and parameter design of a hybrid system are proposed for Active Power Injection and nonActive Power (reActive, harmonic, and unbalance Power) compensation. The proposed hybrid system consists of a static var compensator (SVC) in parallel with a capacitive-coupling grid-connected inverter (CGCI) (SVC//CGCI). In SVC//CGCI, the SVC part is used to dynamic compensate the reActive Power and unbalance Power, while the low rating CGCI part is used to inject Active Power, provide harmonic Power and a fixed amount of capacitive reActive Power. Compared with conventional inductive-coupling grid-connected inverter (IGCI), the CGCI can provide Active, reActive and harmonic Power with low rating of Active inverter part. The cost of the SVC part is much lower than that of Active inverter part, thus the reduction of inverter rating can lead to a decrease in the total cost of the SVC//CGCI. Therefore, the SVC//CGCI can be a cost effective solution for Active Power Injection and nonActive Power compensation. Finally, simulation and experimental results are provided to show the advantages and validity of the proposed SVC//CGCI in compared with the conventional IGCI and SVC//IGCI.
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comparisons of different hybrid inverters for Power quality compensation with without Active Power Injection
Conference of the Industrial Electronics Society, 2018Co-Authors: Lei Wang, Chiseng Lam, Manchung WongAbstract:In this paper, the comparisons of different hybrid inverters are provided for Power quality compensation and/or Active inverter Injection. In detail, the characteristics are compared for inductive coupling grid connected inverter (IGCI), capacitive coupling grid connected inverter (CGCI), static var compensator (SVC) in parallel with a CGCI (SVC//CGCI), and hybrid grid connected inverter (HGCI). The comparisons are separately provided for two applications: 1) Power quality compensation 2) both Power quality compensation and Active Power Injection. In this paper, the circuit configurations of different inverters are proposed firstly. Then, the design of each hybrid inverters is provided. After that, the comparisons are provided for above mentioned applications. Finally, the simulation results are provided to verify the characteristics of different hybrid inverters.
