DEVELOPMENT OF A SHUNT ACTIVE POWER FILTER FOR HARMONIC REDUCTION USING SYNCHRONOUS REFERENCE FRAME WITH SPACE VECTOR PULSE WIDTH MODULATION
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- NGN 3000
ABSTRACT
This work aimed at designing and implementation of Shunt Active Power Filter (SAPF) for power quality improvement through harmonic reduction. The current harmonics are being caused by nonlinear characteristic of power electronics based equipments which increase power losses and in turn reduce power quality. This work employed a three phase three wire shunt active power filter implemented by simulation in MATLAB/Simulink for harmonic reduction. Synchronous Reference Frame (SRF) was used as a control strategy and for reference harmonic current generation and Space Vector Pulse Width Modulation (SVPWM) was adopted as current controller for switching signal generation of Voltage Source Inverter (VSI). With RL load under balanced voltage condition, the developed SAPF-SVPWM achieved a reduction of Total Harmonic Distortion (THD) of 0.91% as compared to 0.92% with Fuzzy Logic Pulse Width Modulation. In addition, the developed SAPF- SVPWM model was compared with SAPF without compensation using RL load under unbalanced voltage and the result shows that the developed SVPWM achieved reduction in THD from 26.68% to 1.74 % after and before compensation. All the results obtained are within IEEE 519 harmonics standard (i.e. THD less than 5%) with nonlinear load under balanced and unbalanced voltage. The result also shows an improvement of 1.087% with RL load under balanced voltage. This confirmed the effectiveness of the SAPF in harmonics reduction.
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