In order to enhance the controllability of power flow in transmission network

an electromagnetic hybrid power flow controller（EHPFC） is proposed

in which "Sen" transformer（ST） and unified power flow controller（UPFC） share the excitation winding. The optimal capacity coordination of ST and UPFC is derived in detail

and the control strategy of EHPFC is optimized. The steady-state and transient characteristics of EHPFC and UPFC for tidal current regulation are analyzed. The performance of EHPFC on the power flow of IEEE 14-node complex ring network is studied by using PSD-BPA software. The hardware experiment model of the transmission power flow of the double-ended system is established

and the simulation experiment of EHPFC is carried out. Simulation and experimental results show that EHPFC can achieve the same power flow control capability as UPFC at lower cost

and make up the problem that shortcomings of ST cannot be adjusted for continuous power flow

and verify the performance of EHPFC control flow.