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.
