Improvement of the electrical energy quality using a Shunt Active Filter supplied by a photovoltaic generator (original) (raw)
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Solar photovoltaic energy system-based shunt active filter for electrical energy quality improvement
International Journal of Simulation and Process Modelling, 2016
This article presents a harmonic compensation system using a photovoltaic generator (GPV) to improve the supply power quality. The proposed configuration is constituted by a grid connected three-phase inverter, a PV array and a nonlinear load formed by a bridge rectifier feeding a resistive load in series with an inductor. An indirect current control via the method of active and reactive power is proposed to compensate the harmonic currents and reactive power at the point of common coupling while injecting active power from the solar system to the grid. The perturb and observe (P&O) method has been applied to track the maximum power point. The proposed system simulation under MATLAB/Simulink environment proves the robustness of the proposed control approach that simultaneously guarantees the compensation of harmonic currents, the correction of the power factor and the injection of PV power to the grid.
Harmonic Mitigation in Electrical Grid Connected Renewable Energy Sources
2018
This paper presents the photovoltaic system connected to electrical grid with the presence of non-linear load (three-phase rectifier) in the first case, then tries to minimize the harmonic currents generted by this non-linear load with applying the technology of the shunt active power filter (SAPF). In this work, we use the MPPT controller for the Boost converter, the PWM command for the three-phase inverter and, with regard to the shunt active filter, we have chosen the PQ theory for harmonic currents identification, and hysteresis control for the inverter, and the PI controller for the DC bus. The simulation results obtained show the efficiency of this moderne technique given the waveforms of the currents obtained which are very close to the sinusoid shape , and the values of the calculated total harmonic distortion (THD) rates which are in the standard norms. ❛❜❝❞ ❢❣❤— Active Power Filter, Electric Grid, Harmonics, Power Quality ; PV System, MPTT , THD
Harmonics Elimination in Power Generation Using Active Power Filter
2020
In distribution systems, the load has been a sudden increase or decreases and it is like as nonlinear loads so the load draw non-sinusoidal currents from the AC mains and causes the load harmonics and reactive power, and excessive neutral currents that give pollution in power systems. Most pollution problems created in power systems are due to the nonlinear characteristics and fast switching of power electronic devices. Shunt active filter based on current controlled PWM converters are seen as a most viable solution. This paper presents the harmonics and reactive power compensation from 3P4W micro-grid distribution system by IP controlled shunt active. The technique which is used for generate desired compensation current extraction based on offset command instantaneous currents distorted or voltage signals in the time domain because compensation time domain response is quick, easy implementation and lower computational load compared to the frequency domain.
Power System Harmonic Compensation Using Shunt Active Power Filter
This paper shows the method of improving the power quality using shunt active power filter. The proposedtopic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is fromhysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Thispaper represents the simulation and analysis of the using three phase three wire system active filter to compensate harmonics .Theproposed shunt active filter model uses balanced non-linear load. This paper successfully lowers the THD within IEEE norms and satisfactorily works to compensatecurrent harmonics.
The strong development of renewable energy sources (RES), especially distributed energy sources, brings many benefits to the power system. Single-phase photovoltaic (PV) systems are the fastest growing type of distributed energy source worldwide today. Besides the beneficial factors for the distribution power system, the high penetration rate of solar power systems also causes negative impacts, especially power quality issues. PV inverters generate harmonics during the high-frequency switching of semiconductor elements. Traditionally available passive filters are not effective enough to ensure output power quality when the PV system generates power to the distribution grid. Therefore, this study presents the design of a proportional resonant current controller combined with active filter harmonic compensated (PR+HC) for a single-phase PV inverter. This controller, when integrated into traditional PV inverter, will provide better output power quality, contributing to reducing total harmonic distortion (THD) on the distribution grid. This study analyzes the parameters affecting the harmonic attenuation effect of the PR+HC controller, then simulates it on MATLAB Simulink to evaluate the results. The results of the study show that the PR+HC controller is not only effective in reducing the amplitude of odd harmonics, but also operates reliably even when the grid frequency fluctuates widely.
Harmonic suppression compensation of photovoltaic generation using cascaded active power filter
Eastern-European Journal of Enterprise Technologies, 2021
The wide spectrum of electromagnetism that explains current and voltage at specific time and location in a power system is referred to as power quality. Alternative energies are becoming more popular due to concerns about power quality, safety, and the environment, as well as commercial incentives. Moreover, photovoltaic (PV) energy is one of the most well-known renewable resources since it is free to gather, unlimited, and considerably cleaner. Active power filter (APF) is an effective means to dynamically suppress harmonics and solve power quality problems caused by the DC side voltage fluctuation. Therefore, this paper describes a substantial advancement in the harmonic suppression compensation algorithm, as well as the cascaded active power filter. Also, this paper focuses on compensating the error of photovoltaic grid-connected generation based on optimized H-bridge cascaded APF. The details of the working principle and topological structure of the APF used as the compensation ...
Comparative Analysis on Control Methods of Shunt Active Power Filter for Harmonics Mitigation
2014
This paper presents an overview of different control methods which are applied on Shunt Active Power Filter to achieve harmonics reduction and power factor improvement. In recent decades, the world has seen an expansion in the use of non-linear loads. These loads draw a non-sinusoidal current from the source and distribute them throughout the system. As a result the power quality degrades. Therefore, Active Power Filter and its control have been proposed which provides excellent harmonic compensation and power quality improvement.
2015
The increase of the harmonics disturbance in the ac mains currents has become a major concern due to the wide spread of power electronics equipment in modern electrical systems. This paper presents the analysis and simulation of a three-phase active power filter (APF) compensating the harmonics and reactive power created by nonlinear in steady state and in transients using Matlab Simulink. An optimal control strategy for shunt active filter which is proposed in this paper, based on voltage source inverter using Modified Synchronous reference frame theory (SRF) and sinusoidal pulse width modulation (SPWM) Control. The target of this strategy is to improve the behavior of source current when it is crossing from zero. It is seen that the APF has effectively mitigate the Total Harmonic Distortion (THD). The FFT analysis of the active filter system brings the THD of the source current less than 5% into compliance with IEEE-519 harmonic standards.
Design of Shunt Active Power Filter to eliminate the harmonic
The shunt active power filter has proved to be a useful device to eliminate harmonic currents and to compensate reactive power for linear/nonlinear loads. This paper presents a novel approach to determine reference compensation currents of the three-phase shunt active power filter (APF) under distorted and/or imbalanced source voltages in steady state. The proposed approach is compared with three reviewed shunt APF reference compensation strategies. Results obtained by simulations with Matlab and Simulink show that the proposed approach is more effective than the reviewed approaches on compensating reactive power and harmonic/neutral currents of the load, even if the source voltages are severely distorted and imbalanced. In addition, the proposed approach yields a simpler design of the shunt APF controller.
International Journal of Advanced Research (IJAR), 2018
This paper discusses the potential for photovoltaic systems to compensate the grid harmonics pollution by using the instantaneous power method. The objective is to develop an optimal algorithm of the control allowing both the active power transfer to the electrical grid and an optimal compensation of the harmonic pollution resulting from unbalanced non-linear loads as well as the compensation of the reactive energy involved. The studied system includes a photovoltaic generator (PV), a DC-DC converter that steps up the PV output to the DC link voltage level with maximum power point tracking (MPPT) control and an inverter that links the system to the grid with a variety of non-linear loads. This method consists in extracting the AC components of the active and reactive instantaneous powers which are related to the harmonics and to optimize the algorithm of the inverter control in order to compensate the disturbing currents caused by these powers. The study was realized according to different regimes that are related to both: the harmonic rate caused by the non-linear charges and the level of solar power received. The obtained results show the benefits of such optimization of the active filter compensation method, in order to improve the quality of the energy (THD ≤2.02%), while limiting the repercussions of the filter on the photovoltaic station and by automatically adapting to the variation of the solar irradiation and the unbalanced load without risk of resonance with the impedance of the grid that can be caused by the passives filters.