Mitigation Of Disturbances By Shunt Active Power Filter Analysis
Mitigation of Disturbances by Shunt Active Power Filter Using Wavelet Transforms
Abstract— The effect of Power Quality (PQ) Disturbances on power utilities are increasing day by day with wide spread use of non – linear loads. “Harmonics is one such disturbance which will cause the power system”. These disturbances are detected and compensated in a better means by using Active Power Filters (APF). The identification and reference current generation is carried out by using Wavelet Transform (WT) Theory. Wavelet Transform Theory at present is one of the most powerful digital signal processing tool for time – frequency analysis of power quality disturbances. The gate pulses for Voltage Source Inverter (VSI) of Active Power Filter are generated …show more content…
Further the parameters of Wavelet Theory are optimized by using Intelligence Techniques. The effective simulations are carried out in MATLAB/SIMULINK.
Keywords— Power Quality (PQ), Active Power Filter (APF), Wavelet Transform (WT), Hysteresis Band Current Controller (HBCC), Total Harmonic Distortion (THD).
I. INTRODUCTION
The Nonlinear devices, like power electronics converters, induction motors, arc furnaces, etc. inject harmonic currents in the AC system which increase overall reactive power demanded by the equivalent load. Also, the number of sensitive loads that require ideal sinusoidal supply voltage for their proper operation has increased. In order to keep power quality under limits proposed by standards, different compensating techniques using series and shunt active filters have been proposed. Active power Filter (APF) characteristics depends on the accuracy of reference/extracted signal and its speed of computation. Different schemes such as Fast Fourier Transform (FFT), Kalman filter, Instantaneous Reactive Power (IRP) and Synchronous Reference Frame (SRF) theory, for the extraction of the desired signal …show more content…
ACTIVE POWER FILTERS
The APF technology is now mature for providing compensation for harmonics, reactive power, and/or neutral current in ac networks. It has evolved in the past quarter century of development with varying configurations, control strategies, and solid-state devices. APF’s are also used to eliminate voltage harmonics, to regulate terminal voltage, to suppress voltage flicker, and to improve voltage balance in three-phase
Abstract— The effect of Power Quality (PQ) Disturbances on power utilities are increasing day by day with wide spread use of non – linear loads. “Harmonics is one such disturbance which will cause the power system”. These disturbances are detected and compensated in a better means by using Active Power Filters (APF). The identification and reference current generation is carried out by using Wavelet Transform (WT) Theory. Wavelet Transform Theory at present is one of the most powerful digital signal processing tool for time – frequency analysis of power quality disturbances. The gate pulses for Voltage Source Inverter (VSI) of Active Power Filter are generated …show more content…
Further the parameters of Wavelet Theory are optimized by using Intelligence Techniques. The effective simulations are carried out in MATLAB/SIMULINK.
Keywords— Power Quality (PQ), Active Power Filter (APF), Wavelet Transform (WT), Hysteresis Band Current Controller (HBCC), Total Harmonic Distortion (THD).
I. INTRODUCTION
The Nonlinear devices, like power electronics converters, induction motors, arc furnaces, etc. inject harmonic currents in the AC system which increase overall reactive power demanded by the equivalent load. Also, the number of sensitive loads that require ideal sinusoidal supply voltage for their proper operation has increased. In order to keep power quality under limits proposed by standards, different compensating techniques using series and shunt active filters have been proposed. Active power Filter (APF) characteristics depends on the accuracy of reference/extracted signal and its speed of computation. Different schemes such as Fast Fourier Transform (FFT), Kalman filter, Instantaneous Reactive Power (IRP) and Synchronous Reference Frame (SRF) theory, for the extraction of the desired signal …show more content…
ACTIVE POWER FILTERS
The APF technology is now mature for providing compensation for harmonics, reactive power, and/or neutral current in ac networks. It has evolved in the past quarter century of development with varying configurations, control strategies, and solid-state devices. APF’s are also used to eliminate voltage harmonics, to regulate terminal voltage, to suppress voltage flicker, and to improve voltage balance in three-phase