中国电力 ›› 2017, Vol. 50 ›› Issue (9): 171-177.DOI: 10.11930/j.issn.1004-9649.201611006

• 新能源 • 上一篇    下一篇

基于改进功率环的微电网对等控制策略研究

王凌云1, 周璇卿1, 李升2, 刘远1   

  1. 1. 三峡大学 电气与新能源学院,湖北 宜昌 443002;
    2. 国网湖北省电力公司,湖北 武汉 430077
  • 收稿日期:2016-11-01 出版日期:2017-09-25 发布日期:2017-09-11
  • 作者简介:王凌云(1981—),男,湖北宜昌人,博士,副教授,从事新能源微电网运行与控制研究。E-mail: wly@ctgu.edu.cn
  • 基金资助:
    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

Research on Peer to Peer Control Strategy for Microgrid Based on the Improved Power Loop

WANG Lingyun1, ZHOU Xuanqing1, LI Sheng2, LIU Yuan1   

  1. 1. College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China;
    2. State Grid Hubei Electric Power Company, Wuhan 430077, China
  • Received:2016-11-01 Online:2017-09-25 Published:2017-09-11
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (No.51407104) and Open Fund from Hubei Key Laboratory of Cascaded Hydropower Stations Operation & Control

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。

关键词: 分布式电源, 微电网, 下垂控制, 对等控制, 控制策略

Abstract: To overcome the defect of traditional droop control method, a peer to peer control strategy for microgrid based on improved power loop is proposed. The proposed strategy can also reduce dependency of microgrid on communication system and realize plug and play for distributed generators (DG) and loads. In order to solve bus voltage amplitude and frequency deviation problem caused by traditional droop control method, a compensation unit of voltage amplitude and frequency is introduced and an improved feedback controller of power loop is established. Taken a microgrid composed by two DGs with same capacity as example, simulation results using the traditional and proposed schemes are compared and analyzed. Microgrid operation characteristics are analyzed respectively in two operation modes: grid-connected/islanding operation switching mode and load switching mode. The simulation results indicate that proposed control strategy can reduce bus voltage amplitude and frequency deviation effectively.

Key words: distributed generation, microgrid, droop control, peer to peer control, control strategy

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