Desain dan Analisis Penggunaan Filter Hybrid pada Beban Non-Linier Rectifier Tiga Fasa

Abstract

The rectifier function in everyday life is usually found in almost all electronic devices that require DC current apart from the battery source. Among other things, televisions, laptop chargers and cell phones. However, the main use of a rectifier in general is to rectify alternating current into direct current. Rectifiers are also included in the category of non-linear loads which can create resonance in a distribution network or can be referred to as harmonics. In a distribution network, rectifiers (non-linear loads) cause distortion of the voltage and current harmonics where it causes power losses and reduced power quality in the network. In improving the quality of electric power in distribution networks that are connected to consumers, it is very important to prevent disturbances in the form of harmonics so that equipment damage does not occur. Harmonics in the distribution network cannot be completely eliminated, but the harmonic values can be reduced to a value that can be tolerated and evaluated to comply with the IEEE 519-2014 standard. Research in this thesis will discuss the reduction of harmonic values in a distribution network designed in a simulation to implement the use of a combination (Hybrid) of active series and passive filters of the High Pass and High Pass type-C types. The one-line diagram of this distribution network is modeled using Simulink Matlab R2022a software with a Three-Phase Rectifier Diode type load and an RL load. The magnitude of the harmonics in the distribution network is indicated by the order in the distorted sinusoidal waves. After the simulation is run, it is found that the value of the voltage harmonics is still below the standard limit, while the highest current harmonic value is in the 5th order. Then the High Pass passive filter and the 5th order Type C were designed. The results of the study by installing a type of High pass filter, Type C filter, series active filter, Hybrid-1 filter, and Hybrid-2 filter respectively for the current THD value are 15.93%, 16.15%, 8 .51%, 0.27%, and 0.25%. Where the current THD value on the use of the two Hybrid filters is below the specified standard limit of 5%. With the installation of a Hybrid filter, the harmonic values contained in each feeder are much better than the installation of a single series active filter, High Pass filter, and Type C filter only. This proves that the series and values of the combined filters are able to influence the harmonic values in the distribution network.