A Social-Welfare based OPF for Integrated Power System with Unified Power Flow Controller

Abstract

In the present transmission systems, it has become mandatory to utilize the available resources and also to substitute it with the renewable energy sources at the earliest. The optimal utilization of the resources provides an added advantage of reduction of its cost to the end consumers of electrical energy. In this paper, a multi- objective optimal power flow (OPF) in the existence of FACTS devices has been proposed for an integrated transmission system. The uniqueness of this paper is the choice of the multi-objective function. The objective function includes minimization of voltage deviation, power loss and negative social welfare (NSW). The reduction of loss and NSW ensures the reduction of per-unit charge of electricity at the customer-end leading to a greater customer satisfaction. The FACTS device used for the problem is Unified Power Flow Controller (UPFC). The hypothesis has been applied on an IEEE 30 bus system. The Mouth Flame Optimization Algorithm has been used for the optimization of objective function. The results obtained have been presented, compared and analysed in detail.