Cost Effective Solution for Optimal Placement and Size of Multiple Statcom Using Particle Swarm Optimization

The optimal placement of STATic synchronous COMpensator (STATCOM) for voltage stability improvement in power system is the important optimization problem. There are so many research works are carried out in the optimal placement of STATCOM to achieve the various objectives using Particle Swarm Optimization (PSO). In conventional optimization technique the weight-age of objective functions are chosen in such a way that all the objectives values are comparable in magnitude or weight-age given is based on the importance of the objectives. In this paper a cost effective objective function has been proposed and the optimisation using PSO optimizes the location and size of STATCOM devices as economical as possible. The Objective function incorporates important system parameters, namely, voltage profile, system losses, reactive compensation and loadability. The coefficients of the system parameters in the objective function are so chosen that they reflect real time cost or penalty value. Thus the objective function proposed is a cost effective objective function. The effectiveness of the proposed objective function is tested for IEEE-30 bus test system with multiple STATCOM devices. Optimization of various parameters so as to obtain improved voltage profile, minimal total system loss, minimal reactive power transfer and maximum stability limit have been achieved using PSO. This paper provides the details of the results obtained on the IEEE-30 bus test system, using PSO for multiple STATCOM application for voltage stability improvement and establishes the effectiveness of the proposed objective function.