Power flow analysis of power system with UPFC using commercial power flow software

This paper proposes a new and efficient approach of load flow analysis for UPFC embedded power systems. Main characteristic of the approach is that an equivalent network without UPFCs, which is obtained easily according to two basic schemes of UPFC control, is used for load flow analysis of original system including UPFCs. Then control parameters of each UPFC is determined by the load flow solution. The nature of the approach makes commercial software of power system analysis can be employed for load flow solutions of systems with UPFCs, hence it inherits entire advantages of the conventional techniques in load flow analysis. Numerical examples are given to indicate that the approach is reliable and efficient.