An adaptive controller for a series active filter to compensate voltage sags, unbalance and harmonic distortion

2003 ◽  
Author(s):  
G. Escobar ◽  
A.M. Stankovic ◽  
V. Cardenas ◽  
P. Mattavelli
Keyword(s):  
Harmonic Distortion ◽  
Adaptive Controller ◽  
Active Filter ◽  
Voltage Sags

scholarly journals Improving Power Quality and Mitigation of Harmonic Distortion Impact at Photovoltaic Electric Vehicle Charging System

2021 ◽  
Vol 5 (1) ◽  
pp. 25-32
Author(s):  
Adel Elgammal ◽  
Curtis Boodoo
Keyword(s):  
Electric Vehicle ◽  
Power Quality ◽  
Fuzzy Logic Controller ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Current Control ◽  
Shunt Active Filter ◽  
Electric Cars ◽  
Charging System ◽  
High Penetration

This article offers a clear and realistic design for an active power filter to increase reliability and power quality of the photovoltaic charging system and a high-penetration electric vehicle distribution system. The MOPSO algorithm is used as the basis for problems with optimization and filter tuning. A typical regular load curve is used to model the warped power grid over a 24-hour cycle to estimate the total harmonic distortion (THD). For structures with high penetration of electric cars, the probability of minimizing THD (for example to five percent) is explored via optimum capacity active shunt filters and shunt capacitors. To maximize general performance of the charging system, the switching systems are re-scheduled. Moreover, to increase the current control accuracy of shunt active filter, the fuzzy logic controller is utilized. The major drawback to new system is that it would have unrestricted billing for entire day to cope with voltage interruption. In MATLAB / SIMULINK, detailed machine setup and control algorithm experiments are simulated. The simulation findings confirm the efficiency and viability of projected shunt active filter to enhance voltage profile and track power performance of photovoltaic charging system.

scholarly journals Multiple AI based Controlling Techniques for Power Filter Output Quality Improvement

2021 ◽  
Vol 7 (1) ◽  
pp. 11-20
Author(s):  
Rajesh Raghuvanshi ◽  
Dr Sukul Lomash
Keyword(s):  
Distribution System ◽  
Output Voltage ◽  
Learning Algorithm ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Voltage Source ◽  
Quality Factors ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Power Filter

The excessive of power electronics devices in distribution system has evolved the problem of power quality. This work represents the effective solution of shunt active power filter for eliminating the harmonics to maintain the quality of utility power supply. In the proposed scheme shunt active filter acts as a voltage source and eliminates harmonics by injecting equal but opposite harmonics components at the point of common coupling. Simulation of shunt active filter based on instantaneous reactive has been achieved in the MATLAB/SIMULINK environment. The controllers are being designed with the objective of reducing the THD% in voltage and current available at the nonlinear load terminal of the system. The controller incorporated optimization algorithms based on the artificial intelligence techniques as well. The comparative analysis of the effectiveness and efficiency of the controllers in improving the quality factors has been carried out. The distortion level in the output voltage waveforms in both the cases being fed to the load when compared, it is found that proposed hybrid structure of control for the filter is more effective in reducing the distortion as compared to standard PQ theory based architecture. The study concluded that the total harmonic distortion in the voltage output waveform being fed to the load using only PQ theory based online learning algorithm is found to be 1.59 % while in case of the output voltage at the load terminal from the power filter using proposed hybrid algorithm comprising of NN learning with CSA optimizing control and PQ_RLS algorithm for THD reduction the THD% level is 0.43 %.

Design of Active Filter Based on the Active Power Balance

2014 ◽  
Vol 596 ◽  
pp. 709-712
Author(s):  
Ling Ji
Keyword(s):  
Single Phase ◽  
Harmonic Distortion ◽  
Active Power ◽  
Active Filter ◽  
Simulation Software ◽  
Point Of View ◽  
Inductive Load ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Functional Point

In order to eliminate harmonics generated by the power electronic devices, from a functional point of view the amount of the balance, the use of filters to supply current and DC voltage is sampled in a controlled manner to achieve harmonic compensation, the establishment of a single-phase active power filter the control system of the model and the theoretical analysis of the program by Saber simulation software has been validated in simulation, based on a prototype developed, according to the single-phase shunt active filter to achieve our scheme can effectively harmonic compensation for pollution caused by the rectifier with inductive load, simulation and experimental results show that this method can be controlled harmonic distortion at 5.8%.

scholarly journals Harmonics Analysis of Input Current of 3-Phase PWM Rectifier

2021 ◽  
Vol 1 (1) ◽  
pp. 31-40
Author(s):  
Alfin Prima Adjie ◽  
Muhammad Imran Hamid
Keyword(s):  
Power Level ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Current Control ◽  
Input Current ◽  
Control Technique ◽  
Pwm Rectifier ◽  
Operating Range ◽  
Q Theory ◽  
Sinusoidal Input

Rectifier is a non-linier load that causes harmonic distortion in the power system. Pulse-width modulation (PWM) method is an effective method in pressing the magnitude of harmonics in a rectifier application,  it provides an almost sinusoidal input current. However, the variation of loads that supplied by a rectifier cause the harmonics that arise can still beyond the applicable standard. The amount of harmonics in the operating range of a rectifier need to be identified to determine the filter on the input side. In this research article, 3-phase PWM rectifier was designed with hysteresis current control technique using PSCAD software simulation. Harmonic compensation was carried out by applying an active filter based on P-Q theory to reduce the harmonic distortion that occurs in the input current, thus giving a low total harmonic distortion (THD) value. Based on the simulation, 3-phase PWM rectifier operation starting at a power level of 150 kW, giving a THD value above 5-10% by the increasing the amount of  load supplied by the rectifier. The application of active filter based on the P-Q theory is able to compensate harmonics in the input current wave with a THD value below 5% in the rectifier operating range.

scholarly journals ANFIS control of a shunt active filter based with a five-level NPC inverter to improve power quality

2021 ◽  
Vol 11 (3) ◽  
pp. 1886
Author(s):  
Mahmoud Mostefa Tounsi ◽  
Ahmed Allali ◽  
Houari Merabet Boulouiha ◽  
Mouloud Denaï
Keyword(s):  
Power Quality ◽  
Fuzzy Inference ◽  
Fuzzy Controller ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Nonlinear Loads ◽  
Inference System ◽  
Shunt Active Filter ◽  
Neuro Fuzzy

This paper addresses the problem of power quality, and the degradation of the current waveform in the distribution network which results directly from the proliferation of the nonlinear loads. We propose to use a five-level neutral point clamped (NPC) inverter topology for the implementation of the shunt active filter (SAPF). The aim of the SAPF is to inject harmonic currents in phase opposition at the connection point. The identification of harmonics is based on the pq method. A neuro-fuzzy controller based on ANFIS (adaptive neuro fuzzy inference system) is designed for the SAPF. The simulation study is carried out using MATLAB/Simulink and the results show a significant improvement in the quality of energy and a reduction in total harmonic distortion (THD) in accordance with IEC standard, IEEE-519, IEC 61000, EN 50160.

Selective Active Filter With Optimum Remote Harmonic Distortion Control

2004 ◽  
Vol 19 (4) ◽  
pp. 1990-1997 ◽  
Author(s):  
G. Casaravilla ◽  
A. Salvia ◽  
C. Briozzo ◽  
E.H. Watanabe
Keyword(s):  
Harmonic Distortion ◽  
Active Filter ◽  
Distortion Control

Artificial Bee Colony Algorithm-Based Shunt Active Filter for Sinusoidal Supply and Trapezoidal Supply

2017 ◽  
Vol 27 (01) ◽  
pp. 1850016 ◽  
Author(s):  
R. Karthika ◽  
V. Suresh Kumar
Keyword(s):  
Power Factor ◽  
Artificial Bee Colony ◽  
Harmonic Distortion ◽  
Power Converter ◽  
Pi Controller ◽  
Active Filter ◽  
Voltage Response ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Bee Colony

In this paper, a DC-link voltage tuning algorithm is introduced to control the shunt active filter (SAF) with sinusoidal and trapezoidal power supplies. The purpose of the proposed optimization algorithm is for tuning the PI controller and reducing the harmonics level. Artificial bee colony (ABC) algorithm is introduced for tuning the gain of the controller and the voltage variation of power converter by using PWM pulses. It regulates the DC-link voltage as per the signal harmonics and the active power loss of the system is reduced. Therefore, the accurate compensation current is injected by the SAF devices. The proposed ABC-PI controller-based harmonic compensation method is implemented in MATLAB/Simulink platform. Then, the Total Harmonic Distortion (THD) and the power factor are evaluated. The results of the proposed method are compared with PI controller and PSO-PI controller. The proposed method has fast DC-link voltage response, low THD and good power factor.

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