【摘要】 针对微电网孤岛运行模式下有功功率不平衡导致的系统频率波动问题,本文提出了需求响应参与微电网调频的变论域模糊PI控制策略。通过研究各种分布式电源的发电特性,搭建了含微型燃气轮机、储氢系统、风力发电以及用电负荷的微电网负荷频率控制模型,其中微型燃气轮机为主调频机组,储氢系统辅助参与调频,并在此基础上,以聚合变频空调为需求侧资源,研究了需求响应参与微电网调频的变论域模糊PI控制策略。仿真结果表明,采用该策略对提高频率调节速度及降低超调作用显著,更加适应微电网调频对于时效性和精确性的要求,有助于改善微网调频性能。更多还原

【Abstract】 Aiming at the system frequency fluctuation caused by the active power imbalance in the micro-grid island operation mode,a variable-domain fuzzy PI control strategy with demand response and participation in frequency regulation of the micro-grid is proposed. By studying the power generation characteristics of various distributed power sources,a micro grid load frequency control model including micro gas turbines,hydrogen storage systems,wind power generation,and power loads is established. The micro gas turbines are mainly frequency-modulated units,and the hydrogen storage system assists in frequency modulation. Based on this,a variable-universal fuzzy PI control strategy for demand-response participation in frequency regulation of microgrids is studied with aggregate variable-frequency air conditioners as demand-side controllable load resources. The simulation experiment results show that by using this strategy there is a significant effect on increasing the frequency adjustment speed and reducing overshoot,and it is more suitable for the timeliness and accuracy requirements of micro grid frequency modulation,which is helpful to improve the frequency regulation performance of micro grid.更多还原