Reactive power control strategy based on electrochemical energy storage power plant to resist the risk of commutation failure

The commutation failure of the converter station of a single DC transmission network is prone to failure when the AC side fails. Aiming at this issue, a reactive power control strategy based on the electrochemical energy storage station to resist the risk of commutation failure is proposed in the paper. The paper analyzes the causes and countermeasures of the commutation failure occurred in HVDC systems. Based on the existing commutation fault prediction method, a reactive power control strategy based on electrochemical energy storage power plant is proposed to resist the risk of commutation failure. A ±500kV direct unipolar DC transmission model is built on the PSACD/EMTDC simulation platform. The feasibility of the control strategy is verified by simulation analysis.