Interline Feeder of Shunt Passive Harmonic Filter and Detuned Reactor to Reduce Harmonic Distortion

Abstract

Power electronics devices are increasingly needed today. Every human activity always uses power electronic equipment such as motor drive power supply, charger, inverter, control system, etc. The principle of switching work on these equipment can cause harmonics so that they are considered as nonlinear loads. The large number of power electronic devices in the electric power system causes high harmonic distortion. THD and IHD are the measuring parameters for harmonics. High THD cannot be reduced by a shunt harmonic passive filter alone. Therefore, it is necessary to add additional devices such as a detuned reactor as additional equipment to increase the performance of the harmonic power filter. Combination of detuned reactor and shunt harmonic passive filter are placed on interline feeder bus. This interline method is done to save on adding harmonic filters to each feeder. Generally, each feeder is connected to a nonlinear load, so a harmonic filter is needed on each feeder. Several scenarios were made to compare the ability of the shunt harmonic passive filter (SHPF) when without a detuned reactor and when combined with it. All of these scenarios were carried out in the condition of the interline feeder of the electric power system. Each scenario show an increase in the ability of the SHPF after being combined with a detuned reactor. In the first scenario, the THD-I value is 18.16% in feeder number 1 and 15.86% in feeder number 2. THD-V value is 26.9% in feeder number 1 and 23.58% in feeder number 2. In the second scenario, the THD-I value is 9.57% in feeder number 1 and 10.96% in feeder number 2. THD-V value is 8.87% in feeder number 1 and 8.87% in feeder number 2. In the third scenario, the THD-I value is 3.95% in feeder number 1 and 4.53% in feeder number 2. THD-V value is 2.17% in feeder number 1 and 2.17% in feeder number 2.