Effect of Non-Linear Electricity Loads Against Harmonics in One Phase Inverters

Abstract

This study aims to obtain an overview of the effect of non-linear loads on harmonics on a single-phase inverter which can later use as one of the primary considerations on the quality of electricity on the harmonic side for AC load electricity use with power plants sourced from DC generators using inverters. This research conducted at the Jakarta Electrical Engineering Laboratory for 7 months from March to September 2018. The research method uses an experimental method. The schematic of the experiment begins with setting the equipment. Then treated with non-linear load changes as an effect on harmonics. The results of the treatment analyzed so that conclusions can drawn. The results showed that there an effect of changes in voltage harmonics, with the most significant increase in voltage THD caused by LED television load of 1,18%, and the lowest voltage THD caused by refrigerator load of 1,03%. However, when compared with IEEE 519 – 1992 standard, then all types of non-linear loads that get supplies from the inverter still within the safe limits for electronic devices. While the most significant current THD change caused by LED television of 39,57%, and the lowest current THD caused by refrigerator load of 6,76%. Change in current THD when compared to the IEEE 519 – 1992 standard with loads like compact fluorescent lamp ≥ 40W, LED lamp ≥ 32W, fluorescent tube lamp ≥ 40W with electronic ballast, LED television, laptop, desktop, and printer that get supplies from the inverter not within the safe limits for electronic devices, because they are not in accordance with IEEE 519 – 1992 standard.

Keywords: Harmonics, voltage, current, nonlinear, one phase inverter

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