基于氢储能的双馈风力发电系统功率控制策略

提出一种氢储能装置融入双馈风机直流侧的并网功率控制策略。为弥补氢能动态响应慢的特点,设置控制信号的优先级:超级电容器氢储能系统。利用信号转换模块选择工作模式,降低超级电容器的退运概率,保证电解槽恒功率运行。系统各单元通过功率控制策略和DC/DC变流器控制,平衡直流母线上的功率波动,利用DC/AC并网逆变器汇入低压交流网络。在电网冲击、负载波动及风速出力不均的情况下,满足负载要求,实现柔性并网,同时有效解决风机弃风问题。通过仿真证明了模型及其控制策略的有效性。

Power control strategy of doubly-fed wind power generation system based on hydrogen energy storage

This paper proposes a grid-connected power control strategy for a hydrogen storage device integrated on the DC side of a double fed induction generator. In order to compensate for the slow dynamic response of hydrogen energy, the priority of the control signal is set: supercapacitor > hydrogen storage system. The signal conversion module is used to select the working mode to reduce the probability of returning of the supercapacitor and ensure the constant power operation of the electrolyzer. Each unit of the system is controlled by the power control strategy and the DC/DC converter to balance the power fluctuations on the DC bus, and the DC/AC grid-connected inverter is used to sink into the low-voltage AC network. In the case of grid impact, load fluctuations, and uneven wind speed output, the load requirements are met, and the controllable flexible connection is realized, and the wind curtailment is effectively solved. The effectiveness of the model and its control strategy is proved by simulation.