混合微电网的功率分配策略及PI参数整定  

Power distribution strategy and PI parameter regulation of hybrid microgrid

作　　者：任鹏 李春兰 王长云 王晓暄 王静 REN Peng;LI Chunlan;WANG Changyun;WANG Xiaoxuan;WANG Jing(College of Mechanical and Electrical Engineering,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China;College of Energy Engineering,Xinjiang Institute of Engineering,Urumqi,Xinjiang 830023,China)

机构地区：[1]新疆农业大学机电工程学院,新疆乌鲁木齐830052 [2]新疆工程学院能源工程学院,新疆乌鲁木齐830023

出　　处：《江苏大学学报（自然科学版）》2022年第3期325-331,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51467021)。

摘　　要：针对混合微电网中功率分配策略复杂及PI控制器参数整定困难的问题,提出一种基于混合储能荷电状态的功率协调分配策略及PI参数整定方法.该策略以超级电容荷电状态和蓄电池参考功率为控制目标,进行网内波动功率协调分配,根据分配功率获得相应的电流参考值;依据工业控制理想相角裕度利用Siso反馈技术自动寻优设计PI控制器,调节实际值与参考值的偏差.基于混合微电网拓扑结构,确定了基于超级电容荷电状态的功率协调分配策略;在此基础上构建相关的混合微电网功率分配及充放电控制框图,采用Siso反馈技术整定PI控制器参数.在MATLAB/Si-mulink仿真平台搭建风光储混合微电网模型进行仿真,分析了系统各模块动态响应,对比了功率分配策略.结果表明:所提出的控制策略可对波动功率有效分配、平滑蓄电池瞬时输出、减少充放电切换次数,在保证直流母线电压波动值≤5%的同时缩短了动态恢复时间.To solve the problems of complex power allocation strategy and difficult parameter setting of PI controller in hybrid microgrid,the power coordinated distribution strategy and the PI parameter setting method were proposed based on hybrid energy storage state of charge.The state of charge of super capacitor and the reference power of storage battery were regarded as control objectives,and the fluctuating power in the network was coordinated and distributed.The corresponding current reference value was obtained according to the distributed power.According to the ideal phase angle margin of industrial control,the PI controller was automatically optimized by Siso feedback technology to adjust the deviation between the actual value and the reference value.According to the topology of hybrid microgrid,the power coordinated distribution strategy was determined based on the state of charge of super capacitor.The relevant hybrid microgrid power distribution and the charge discharge control block diagram were constructed,and the parameters of PI controller was adjusted by Siso feedback technology.The wind-solar-storage hybrid microgrid model was built on the MATLAB/Simulink simulation platform for simulation.The dynamic response of each module of the system was analyzed,and the power distribution strategies were compared.The results show that the proposed control strategy can effectively distribute the fluctuating power,smooth the instantaneous output of the battery and reduce the switching times of charge and discharge,and the dynamic recovery time is shortened with ensuring the voltage fluctuation of DC bus less than or equal to 5%.

关 键 词：微电网 荷电状态 储能元件 功率协调分配 Siso反馈控制技术 PI整定 功率波动 

分 类 号：TM08[电气工程—电工理论与新技术]