Research on Power Flow Controller Based on Dual-Excited Synchronous Machine

The power flow controller (PFC) has the capability to optimize power distribution and enhance the stability of the power network. The system stability and reliability pose significant challenges for the PFC based on the power electronic equipment. This paper presents a new Power Flow Controller based on Dual-Excited Synchronous Machine (PFC-DESM), which has not only the function of the UPFC, but also the high reliability and overload capability. The mathematic equation of the PFC-DESM is established and the basic principle is clarified. The operating performance is assessed through the simulation calculations, and the correlation between the line active power, line reactive power and dual-axis excitation currents is deduced. The concludes can supply the technical supports for flexible adjustment of the power flow.