基于改进功率环的微电网对等控制策略研究

发布时间：2018-05-31 07:49

本文选题：分布式电源 + 微电网　；参考：《中国电力》2017年09期

【摘要】：基于传统下垂控制方法存在的不足,同时考虑减小微电网依赖于通信系统,使负荷和分布式电源能够即插即用,提出一种基于改进功率环的微电网对等控制策略。传统的下垂控制方法会造成系统频率和交流母线电压的偏差,针对该问题,引入电压补偿环节和频率补偿环节,构建改进的功率环反馈控制器。利用该控制策略对由2台同容量分布式电源构成的微电网进行仿真分析,并和采用传统下垂控制方法所得结果进行比较,此外,在并网/孤网切换模式和负荷投切模式下,分析该控制策略下的微电网运行特性,仿真结果表明了基于改进功率环的微电网对等控制策略能够有效降低系统频率和交流母线电压的偏差。
[Abstract]:A peer-to-peer control strategy for microgrid based on improved power loop is proposed to reduce the dependence of microgrid on communication system and enable load and distributed generation to be plug and play based on the shortcomings of traditional droop control methods. The traditional droop control method can cause the deviation of system frequency and AC bus voltage. To solve this problem, an improved power loop feedback controller is constructed by introducing voltage compensation link and frequency compensation link. The control strategy is used to simulate and analyze the microgrid composed of two distributed power sources of the same capacity, and the results are compared with those obtained by the traditional droop control method. In addition, in the grid-connected / isolated switching mode and load switching mode, The simulation results show that the peer-to-peer control strategy based on improved power loop can effectively reduce the deviation of system frequency and AC bus voltage.
【作者单位】：三峡大学电气与新能源学院;国网湖北省电力公司;
【基金】：国家自然科学基金资助项目(51407104) 梯级水电站运行与控制湖北省重点实验室(三峡大学)开放基金资助项目~~
【分类号】：TM727

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