Research of Control Strategy of Dynamical Reactive Power in AC/DC Hybrid power grid

This paper analyzed the control strategy of dynamical reactive power in Sichuan AC/DC hybrid power grid, and presented the limitation of the control strategy based on location bus voltage, which satisfied the need of dynamical reactive power output under AC line faults or DC block faults only. Thus, control strategy of STATCOM based on real-time wide-area signal was presented by introducing the tie-line power flow of Sichuan and Chongqing power grid. Simulation results showed that the control strategy would increase the transient stability and improve the dynamical stability of the AC/DC hybrid system at the same time.