The Stability Improvement Method for Interline Power Flow Controller

To analyze the impact of power flow transfer of the interline power flow controller (IPFC) on safe operation, this paper studies the safety boundary constraints of the IPFC converter station based on the PQ power domain, the impact on the safe operation of IPFC grid when power flow transferring is analyzed. Nevertheless, to solve instability caused by the power flow transfer, a virtual impedance-based method is introduced to increase the safety boundary and enhances the stable operation ability of the system. Finally, the simulations of a 3-terminal IPFC system established in PSCAD/EMTDC software verify the correctness of the proposed method.