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. The 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 the original system including UPFCs. Then control parameters of each UPFC are determined by the load flow solution. The nature of the approach means that commercial software for power system analysis can be employed for load flow solutions of systems with UPFCs, hence it has the advantages of the conventional techniques in load flow analysis. Numerical examples are given to indicate that the approach is reliable and efficient