Improved PSO applied to the optimal power flow with transient stability constraints

Abstract

Stability is an important constraint in power system preventive control against blackouts triggered by transient instability (TS) after a contingency. The Transient Stability Constrained Optimal Power Flow (TSCOPF) has a considerable attention in recent years. In this paper, a novel formulation of Optimal Power Flow (OPF) problem is proposed by incorporating the transient stability constraints into the conventional OPF problem. Improved Particle Swarm Optimizer (IPSO) is developed to solve the TSCOPF. The proposed approach is tested on the Western System Coordinated Council (WSCC) 9-Bus system and IEEE 30-bus system. The results show that the system stability has been greatly enhanced with the proposed formulation.