[关键词]
[摘要]
随着风力发电所占发电比例的上升,其随机性、波动性及间歇性对电网的影响不可忽视。基于超级电容和蓄电池组成的复合储能系统,提出了一种用于抑制风电功率波动的自适应复合储能控制策略,通过引入超级电容荷电状态反馈来实施对低通/高通滤波器时间常数的控制,在完成对风电波动功率平抑的同时,合理分配平抑功率,避免超级电容过充过放。最后通过仿真,针对春夏秋冬不同时间窗口下的功率波动进行平抑,验证了所提自适应控制策略的有效性。
[Key word]
[Abstract]
With the rising proportion of wind power generation, the effects on grid made by its randomness、volatility and intermittency can not be ignored. Based on hybrid energy storage system composed of super capacitor and battery, a adaptive composite energy storage control strategy to dampen the power fluctuations of wind farm was proposed. The feedback of super capacitor’s state to implement the control of lowpass filter and highpass filter’s time constant was introduced. It finished suppressing the power fluctuations and distribute the power reasonably to avoid overcharging/overdischarging of super capacitor at the same time. Finally, through the simulation of suppressing the power fluctuations under different time window for spring, summer, autumn and winter the effectiveness of the proposed adaptive control strategy was verified.
[中图分类号]
TM 315
[基金项目]
山西省“十二五”科技重大专项(2060901);国网山西省电力公司科技项目(05161A)