Determination of Optimal Location of Upfc Controller Devices in Electric Transmission System by Using Pso Method

摘要

This paper aims to determine the optimal location for the installation of UPFC controller using Particle Swarm Optimization (PSO) method to minimize small signal oscillations in a multi machine power system and we get reduction in power losses. The UPFC is required to regulate bus voltages and control power flows through the line. This way proper capacitor switching strategy is established to reduce daily and seasonal voltage fluctuations to within acceptable limits. The steady-state transmittable power of network can be increased and the voltage profile along the transmission line controlled by reactive shunt compensation. Here, the performance of UPFC mainly depends upon its parameters which are set for providing economical operation. PSO method is an efficient and general solution to solve most non linear optimization problems with nonlinear inequality constraints. In PSO Particle swarm optimization (PSO), the potential solution, called particles. All particles selected in this controller depends on only its parameter, which will keep there feasible solutions in their memory. The FACTS devices provides effective damping capability. In power transmission oscillations are reduced and the voltage profile is also improved. Based on this methodology, by considering time delay, an innovative approach is presented and by varying the power angle and making wide area damping control feasible. Only with such a control scheme, UPFC controller can be applied beneficially for economical operation i.e. with reduced generation cost and fuel cost. So by performing sensitivity analysis on the UPFC controller, we are able to find the optimal location on buses to place the UPFC controller in the network.