The research emphasis of this paper is Flexible AC Transmission System (FACTS) device known as the Unified Power Flow Controller (UPFC). To improve the power system stability efficiency, the shunt part of Unified Power Flow Controller UPFC should be located in the place from where it can decrease the effect of voltage changes and the series part should be located in the place where the variation of active and reactive power the most. In this paper had made to separate or extend the series part and shunt part of Unified Power Flow Controller. This gives the possibility to installed series and shunt part of UPFC at different required locations. Using PSCAD to build a new kind of Unified Power Flow Controller model.The simulation results show that the novel UPFC control has the same function, although the transmission capacity is a bit small, But new UPFC has the characteristics of the structure is part of series and parallel is separation, make the project on the UPFC of installation problems more flexibility, it has a broad prospect in engineering application.
