Analysis of Harmonic Improvement in the Computer Laboratory of Samarinda State Polytechnic with the Addition of a Static VAR Compensator

Abstract : An electrical system is said to have a high level of reliability if it is capable of supplying electrical energy continuously and in accordance with user needs. The quality of electrical power can be disrupted by the use of non-linear loads, such as computer devices, electronic devices, and energy-saving lamps. Harmonic problems in power quality arise due to the interaction between the sinusoidal waves of the system and the characteristics of non-linear loads, such as those found in the Computer Laboratory of the Samarinda State Polytechnic, which results in high harmonic current values. To determine the actual conditions, electrical parameters were measured. The results of the measurements showed a total current harmonic distortion value of 33.65% in phase R, 15.85% in phase S, and 92.99% in phase T. The individual current harmonic distortion in phase R decreased from 28.39% to 4.53%, to 3.76% in phase S, and to 2.63% in phase T on Thursday at 15:00 WITA. To overcome this, the use of a Static Var Compensator (SVC) is proposed as a solution to reduce the level of harmonics in the electrical system at the Computer Laboratory of the Samarinda State Polytechnic. The simulation was conducted using Matlab R2023a software through the Simulink feature. The results obtained show that the Static Var Compensator can reduce harmonics well, as seen from the harmonic values on Thursday, where before the Static Var Compensator was installed, the harmonics in phase R were 9.81%, phase S were 10.98%, and phase T were 9%.