Power Quality Improvement Using Fuzzy Logic Control Static Var Compensator In Power System Network

Static Var Compensator (SVC) is a shunt type FACTS which is used in power system primarily for the purpose of voltage and reactive power control in the power system network. In this paper, a fuzzy logic based supplementary controller for Static Var Compensator (SVC) is developed which is used for improve the power quality in generation, transmission and distribution side of power system network. In the generation part of power system fuzzy logic based svc controller is used to damping the rotor angle oscillations and to improve the transient stability of the power system. At the distribution side to minimize the harmonics injected into the distribution systems by the operation of TSC-TCR type SVC used in conjunction with fast changing loads at LV distribution level. Fuzzy logic system and ANN are going to be used solve this nonlinear problem, giving optimum triggering delay angles used to trigger switches in TCR. Fuzzy rules are easily derived from the measurable global signals like line active power flow, and generator speed deviation. The performance of various controllers is then compared based on non linear simulation results. Among these the performance of the proposed controller is found to be better and damp out the system oscillations at faster rate. SVC controller works accurately. Digital computer simulations were performed using MATLAB/ SIMULINK software.