IMPROVEMENT OF POWER QUALITY AND HARMONICS REDUCTION IN DISTRIBUTION NETWORK USING ACTIVE FILTER AND SVC (STATIC VAR COMPENSATORS)

Abstract

This thesis aims to improve the power quality by improving the voltage profile and reduce the distribution network harmonic. The fast increase in load demand in the distribution system operates under harmonic condition, due to nonlinear and switching loads. To work on improving the voltage profile, and reduce the harmonics and distribution line losses the Flexible Alternative Current Transmission System (FACTS) is used. In this thesis, the FACTS family the Static Var Compensator (SVC) has been simulation and investigated. The necessary data are collected from the South District Ethiopian Electric Power Corporation (EEPC), Ethiopian Electric Utility (EES), Wolaita Sodo District, and Substation, and data were analyzed. The distribution transformers are measured using the power quality and harmonics analyzer device “MICROVIP3 PLUS" portable energy in the approach of finding a solution to the problem. The SVCs modeling, and simulation, and coding studies have been carried out using MATLAB R2019a software. The backward/Forward swept method to analyze load flow and particle swarm optimization (PSO) algorithm was used to get the optimal place and rating of SVC. The result showed SVC installed at bus 11 with a rating of 1240.6 KVar that improve voltage profile to between the range of 1.05 and 0.95 and improved from 1.397% up to 14.626% and also reduces power loss from 369.57KW to 269.32KW and harmonics reduction from SVC without SAPF having THD of current 44.46% and THD of voltage 1.72% to THD of current 19.03% and THD of voltage 0.36% that is with SAPF.