Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (4): 104-111.doi: 10.3969/j.issn.1000-565X.2015.04.015

• Power & Electrical Engineering • Previous Articles     Next Articles

Hierarchical Coordinated Control of Islanded Wind-Diesel-Battery Microgrid for Improving Power Quality

Ma Yi-wei Yang Ping Wang Yue-wu Zhao Zhuo-li   

  1. School of Electric Power//Guangdong Key Laboratory of Clean Energy Technology，South China University of Technology，Guangzhou 510640，Guangdong，China
  • Received:2014-10-16 Revised:2014-11-10 Online:2015-04-25 Published:2015-03-03
  • Contact: 马艺玮(1980-)，女，博士生，主要从事可再生能源分布式发电技术与微电网智能控制技术研究． E-mail:ma.yiwei@mail.scut.edu.cn
  • About author:马艺玮(1980-)，女，博士生，主要从事可再生能源分布式发电技术与微电网智能控制技术研究．
  • Supported by:
    Supported by the National High-tech R＆D Program of China (863 Program)(2014AA052001)，the National Natural Science Foundation of China(61273172)and the Key Technology Projects of Strategic Emerging Industries in Guangdong Province(2012A032300001)

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Abstract: As the high-penetration intermittent microsource and the frequently-switched load may impact the opera-tion stability of islanded microgrids，a hierarchical coordinated control scheme based on different time scales，which takes into full consideration the control characteristics of both the diesel generator and the battery storage system，is proposed． In this scheme，a primary controller based on the battery storage system and a secondary controller based on the diesel generator are designed to improve the stability of voltage and frequency of islanded microgrids in diffe-rent time scales． Moreover，in order to resist smaller and faster random system net-load disturbances，a modified droop controller with P-f and Q-V controls of the battery storage system is proposed，which helps to improve the sta-bility of system voltage and frequency． At the same time，in order to resist bigger and slower system net-load dis-turbances，a PI controller and an auxiliary reactive power compensator are presented for the diesel generator，which helps to implement the isochronous control of system frequency and voltage and to further restore the system opera-tion stability． The feasibility and effectiveness of the proposed method is finally verified by the analysis of Dong’ao islanded wind-diesel-battery microgrid operated in various conditions．

Key words: islanded microgrid, time scale, hierarchical coordinated control, diesel generator, battery storage sys-tem

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