基于主从控制的微电网平滑切换控制策略研究.docVIP

基于主从控制的微电网平滑切换控制策略研究 李源1，李永东1,2，程志江1，李响3，郭俊辉4 （1. 新疆大学 电气工程学院， 乌鲁木齐 830008；2. 清华大学 电机工程与应用电子技术系，北京 100084; 3. 国网浙江省电力公司湖州供电公司，浙江 湖州 313000； 4. 上海送变电工程公司，上海 200000） 摘要：微电网在并网与孤岛运行模式下控制策略和控制结构存在差异，当微电网切换时，由于两种模式下控制器的状态不匹配，控制器的输出会发生跳变，产生较大的暂态震荡。因此针对主从控制结构的微电网在并网模式与孤岛模式两种模式下的控制和相互切换，提出了一种将PQ控制和基于改进下垂的V/f控制相结合，通过下垂系数自适应调节和控制器输出状态同步控制，实现微电网平滑切换的综合控制策略。在Matlab/Simulink中建立微电网模型进行仿真分析，仿真结果验证了该控制策略的可行性和有效性，实现了微电网的平滑切换，有效降低了系统切换过程中产生的暂态震荡。 关键词：微电网；主从控制；平滑切换；下垂系数自适应；状态同步 中图分类号：TM933 文献标识码：B 文章编号：1001-1390（2016）24-0000-00 Study on control strategy of smooth switching for micro-grid based on master-slave control Li Yuan1, LI Yongdong1,2, Cheng Zhijiang1, Li Xiang3, Guo Junhui4 (1. College of Electrical Engineering, Xinjiang University, Urumchi 830008, China. 2. Department of Electrical Engineering and Application of Electronic Technology, Tsinghua University, Beijing 100084, China. 3. State Grid ZheJiang Electric Power Company Huzhou Power Supply Company, Huzhou 313000, Zhejiang, China. 4. Shanghai?Power?Transmission?and?Transformation?Engineering?Company, Shanghai 200000, China) Abstract: Mode control strategy and control structure of micro-grid in grid connected and islanded operation are different, when the micro-grid switches, due to the controller status does not match in two modes, the output of the controller will jump and produce larger transient shock. Therefore, according to the master-slave control structure of micro-grid in grid connected mode and island mode and mutual switch, this paper presents a method of PQ control and based on improved droop of the V/F control combination, by adjusting the adaptive droop coefficient and the output of the controller state synchronization control for micro-grid smooth switching control strategy. The micro-grid model is built in Matlab/ Simulink to be simulated and analyzed. The simulation results verify the feasibility and effectiveness of the proposed control strategy, which realize the micro-grid