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 %.

Intelligent Controller for Shunt Active Power Filter to Improve Power Quality

2014 ◽  
Vol 573 ◽  
pp. 40-45
Author(s):  
S.S. Lalitha Maheswari ◽  
V. Revathi ◽  
S. Muralidharan
Keyword(s):  
Distribution Systems ◽  
Fuzzy Controller ◽  
Active Filter ◽  
Voltage Source ◽  
Nonlinear Load ◽  
Shunt Active Power Filter ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Three Phase ◽  
Bridge Rectifier

This paper presents a comparative study on performance of conventional PI controller and fuzzy controller on three phase, three wire voltage source inverter based shunt active filter that is used to compensate the harmonics currents drawn by non-linear loads in distribution systems. Hysteresis PWM method is used to generate the pulses to the switches used in active filter. The compensation is based on PLL method of fundamental current extraction. The nonlinear load taken into account is a three phase diode bridge rectifier.

Design of Efficient Power Filter with Reduced Distortion Using Control Algorithm

IJOSTHE ◽  
2020 ◽  
pp. 1-10
Author(s):  
Rahul Dhakad ◽  
Dr. Rakesh Saxena
Keyword(s):  
Distribution System ◽  
Output Voltage ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Renewable Energy Resources ◽  
Nonlinear Loads ◽  
Nonlinear Load ◽  
Power Filter ◽  
Distortion Level ◽  
Voltage Output

The electrical distribution system is facing undesirable power quality disturbances due to different types of linear/nonlinear loads on the supply system. The objective of the project is to reduce the distortion level in voltage or current input to the load and at the output of the filter. To design a simple but highly viable hybrid active power buffer that is capable of feeding less distorted voltage to the nonlinear load model. To present an optimal controlling of these buffers so as to minimize the voltage distortion by designing a different algorithm for the same. Comparing the THD levels of the output voltage waveform with the standard controlling method with the proposed control design to further enhance the proposed design such that it is practically feasible to be implemented in grid system having renewable energy resources. In this work, a power filter has been designed using different algorithms with an objective to reduce the Total Harmonic Distortion in the voltage output waveforms. The total harmonic distortion in the voltage output waveform being fed to the load using only the PQ_RLS algorithm is found to be 2.18 %. In the case of the output voltage from the power buffer using PQ_RLS algorithm, the THD level is 0.17 %. The distortion level in the output voltage waveforms in both the cases being fed to the load when compared, it is found that RLS algorithm in combination with PQ algorithm is more effective in reducing the distortion as compared to standard RLS method or PQ method.

A Blend Control Scheme of Active Power Filter Based on Harmonic Voltage

2011 ◽  
Vol 268-270 ◽  
pp. 434-439
Author(s):  
Chen Guo ◽  
Cun Bing Gui ◽  
Jian Huang
Keyword(s):  
Distribution System ◽  
Active Filter ◽  
Laboratory System ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Control Scheme ◽  
Harmonic Voltage ◽  
The Relationship ◽  
Current Detection

This paper proposes a blend control scheme of APF based on harmonic voltage to solve the problem that load current detection APF cannot change the harmonic impedance in distribution system. In addition, based on the relationship between the rated volt-ampere of APF and the load volt-ampere, the conductance value could automatic adjustment. Computer simulation and laboratory system are designed and constructed to verify the validity and effectiveness of the shunt active filter equipped with the blend control. The shunt active filter with blend control not only can compensate the nonlinear load harmonic current but also can help to damp the harmonic voltage in distribution system.

scholarly journals Harmonics Mitigation Techniques in Renewable Energy Systems using Shunt Active Power Filter

2020 ◽  
Vol 9 (5) ◽  
pp. 377-381
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Fuzzy Logic Controller ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Nonlinear Load ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Simulation Results

This paper depicts the methodology of improving power quality at load end is connected with renewable source of energy for power generation. The excessive of power physics devices in distribution system has evolved the matter of power quality. Shunt active power filter (SAPF) acts as a current supply and suppresses the harmonics by introducing the same amount of compensating opposite harmonics component along with common coupling. Simulation design of SAPF based on d-q model is implemented using MATLAB/simulink Toolbox. It explores the modelling of a Proportional Integral (PI) and fuzzy logic controller (FLC) based, SAPF for a 3 wire network to compensate current harmonics fed to a nonlinear load. The proposed model can be validated and its robustness will be checked through the simulation results. Simulation results illustrate that the logic based active filter out performs the PI based shunt active filter.

Modelling, Simulation and Implementation of the Three-Phase Fuzzy Based Shunt Active Filter for Limiting the Total Harmonic Distortion

2014 ◽  
Vol 622 ◽  
pp. 121-126
Author(s):  
Rahiman Zahira ◽  
A. Peer Fathima ◽  
Ranganath Muthu
Keyword(s):  
Fuzzy Logic ◽  
Harmonic Distortion ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Current Control ◽  
Simple Method ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Three Phase

This paper presents the fuzzy logic controller for shunt active power filter used to compensate harmonic distortion in a three-phase system. The shunt active filter employs a simple method for estimating the reference compensation current. A fuzzy logic based current control strategy is used to regulate the filter current and hence ensure harmonic free supply current. Classic filters may not have satisfactory performance in fast varying conditions. However, an auto-tuned active power filter gives better results for harmonic minimization and power factor improvement. The proposed fuzzy based shunt active filter maintains the THD well within IEEE-519 standards. The validity of the presented approach in harmonic mitigation is verified by simulation results in MATLAB/ Simulink and hardware prototype.

scholarly journals Improvement of Power Quality using a Robust Hybrid Series Active Power Filter

2021 ◽  
Vol 9 (VI) ◽  
pp. 2311-2316
Author(s):  
Dasari Vinay
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Active Power Filter ◽  
Pi Controller ◽  
Active Power ◽  
Active Filter ◽  
Active Filters ◽  
Total Harmonic Distortion ◽  
Shunt Active Filter ◽  
Power Filter

In this paper we are going to see how the DSM PI controller is used to reduce the harmonics in faster. DSM PI controller steps up the voltage to required level. The main aim is to improve the total harmonic distortion. Keywords: Shunt active filter, hybrid active filters, DSM PI controller

scholarly journals Distribution system power quality compensation using a HSeAPF based on SRF and SMC features

2021 ◽  
Author(s):  
Akram Qashou ◽  
Sufian Yousef ◽  
Abdallah A. Smadi ◽  
Amani A. AlOmari
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Sliding Mode ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Phase Locked Loop ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Non Linear

AbstractThe purpose of this paper is to describe the design of a Hybrid Series Active Power Filter (HSeAPF) system to improve the quality of power on three-phase power distribution grids. The system controls are comprise of Pulse Width Modulation (PWM) based on the Synchronous Reference Frame (SRF) theory, and supported by Phase Locked Loop (PLL) for generating the switching pulses to control a Voltage Source Converter (VSC). The DC link voltage is controlled by Non-Linear Sliding Mode Control (SMC) for faster response and to ensure that it is maintained at a constant value. When this voltage is compared with Proportional Integral (PI), then the improvements made can be shown. The function of HSeAPF control is to eliminate voltage fluctuations, voltage swell/sag, and prevent voltage/current harmonics are produced by both non-linear loads and small inverters connected to the distribution network. A digital Phase Locked Loop that generates frequencies and an oscillating phase-locked output signal controls the voltage. The results from the simulation indicate that the HSeAPF can effectively suppress the dynamic and harmonic reactive power compensation system. Also, the distribution network has a low Total Harmonic Distortion (< 5%), demonstrating that the designed system is efficient, which is an essential requirement when it comes to the IEEE-519 and IEC 61,000–3-6 standards.

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.

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