Reduction Of Harmonic Using Single Phase Shunt Active Filter Based On P-Q Theory Method For PWM Cascaded Multilevel Inverter

Mohamad, Sabiq Safiuddin (2016) Reduction Of Harmonic Using Single Phase Shunt Active Filter Based On P-Q Theory Method For PWM Cascaded Multilevel Inverter. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text Reduction Of Harmonic Using Single Phase Shunt Active Filter Based On P-Q Theory Method For PWM Cascaded Multilevel Inverter - Sabiq Safiuddin Mohamad - 24 Pages.pdf - Submitted Version Download (134kB)

Abstract

In recent years the extreme used of power electronic converters and other non-linear loads in industry deteriorates the power systems voltage and current waveforms. The use of nonlinear loads and power electronic circuit in power systems are grow rapidly. Examples are thyristor controlled inductors, converters for High Voltage Direct Current (HVDC) transmission and large adjustable speed drives. All of these loads created unwanted currents into the power system. The impact of harmonic caused more power losses, shorten device life time, and undermine the accuracy of protection and instrumentation device on the system. For higher power applications, multilevel inverter (MLI) structures have the particular advantages of operation at high DC bus voltages which can be achieved by using series connection of switching devices. However, conjunction in designing inverter, it is better to install active power filter such a way to mitigate the harmonic generated by other nonlinear load in the system. For this project, active power filter (APF) helps to enhance the quality of the distorted current waveform produced by the nonlinear load. The performance of APF based on instantaneous power theory control strategies is used and combined with MLI. The detailed analysis and evaluate the performance of APF with p-q theory is based on mathematical method p-q theory equation to generating reference current of shunt APF .The system is validated through extensive MATLAB-SIMULINK Tool Box to analyze the output waveform in term of total harmonic distortion (THD) of current and voltage. Based on result from simulation, by injecting current from APF to the line the THD is decreased in range 4% to 98%.

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