ANALYSIS OF HARMONIC DISTORTION REDUCTION ON MULTILEVEL INVERTERS USING SPWM MODULATION AND PASSIVE FILTER OPTIMIZATION
Keywords:
Harmonic Distortion, Passive Filter, Multilevel InverterAbstract
Solar power system is a renewable energy generator which is currently experiencing quite rapid development. One of the most important components of PLTS is the inverter. Inverter is a component that is used to convert direct voltage (DC) into alternating voltage (AC). However, in its implementation, the AC wave generated by the inverter is not yet a pure sinusoidal waveform. This is because there is harmonic distortion that exceeds the permitted standards. Based on IEEE STD 519-2014, the permitted Total Harmonic Distortion (THD) is not to exceed 5%. This study aims to analyze the reduction of harmonic distortion on Multilevel Inverters by using SPWM modulation and passive filter optimization. Harmonic distortion is reduced to not exceed the permissible standard, namely 5%. This study
uses the Cascaded H-Bridges Multilevel Inverter (CHB-MLI) topology using POD
PWM as the modulation technique. After that, the LCL passive filter is designed
using the PSO Algorithm to optimize the parameters that make up the LCL filter. The
results showed that the PSO Algorithm was able to optimize the passive LCL filter
design used to reduce harmonic distortion in Multilevel Inverters. With parameter
values L1, L2, and Cf each of 22.163 mH, 8.888mH, and 7.0984 μF; able to reduce
the THD value to 3.06%.
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