Using hydrogen energy storage system to improve wind power consumption and low voltage ride through capability

Aiming at the issue of wind power curtailment, with the goal of improving its absorption capacity and green-friendly grid connection, a wind-hydrogen coupling system model and control strategy are proposed.. A DC bus structure of electrolyzer and fuel cell is constructed, and the mathematical models of direct drive wind turbine, electrolyzer and fuel cell are established. The coordinated control strategy is as follows: when the wind power output is greater than the load demand, the residual power of hydrogen production system by electrolyzing water in electrolyzer will be absorbed; When the wind power output is less than the load demand, the fuel cell will supplement the power balance; In case of short-circuit fault at grid side, the system power is balanced by means of electrolytic hydrogen production to realize low voltage ride through. The simulation results show that the wind hydrogen coupling system can improve the decentralized wind power consumption and low voltage ride through capability.