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ZHANG Jun,SHEN Guo-qiao,HU Chang-sheng,XU De-hong.Intermittent Bilateral Reactive Power Variation Islanding Detection Strategy[J].JOURNAL OF POWER SUPPLY,2011,9(2):7-11
Intermittent Bilateral Reactive Power Variation Islanding Detection Strategy
Received:January 06, 2011  Revised:January 15, 2011
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DOI:10.13234/j.issn.2095-2805.2011.2.7
Keywords:grid-connected inverter  islanding  reactive power variation  none detection zone
Fund Project:The National High Technology Research and Development Program of China (863 Program)
           
AuthorInstitutionEmail
ZHANG Jun Institute of Power Electronics, College of Electrical Engineering, Zhejiang University zjuzj@zju.edu.cn
SHEN Guo-qiao Institute of Power Electronics, College of Electrical Engineering, Zhejiang University shenguoqiao@zju.edu.cn
HU Chang-sheng Institute of Power Electronics, College of Electrical Engineering, Zhejiang University
XU De-hong Zhejiang University,College of Electrical Engineering,Institute of Power Electronics xdh@zju.edu.cn
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Abstract:
      Islanding detection is an essential function of distributed grid-connected power generation systems, as the islanding occurrence is unpredictable and very harmful. The voltage and frequency of the constant-power controlled grid-connected inverter working in the islanding state has been studied. The none detection zone (NDZ) is calculated when the output of the inverter has reactive power. Then, intermittent bilateral reactive power variation anti-islanding strategy was proposed. The conditions to eliminate NDZ are presented and the variation parameters are designed. Finally, experiments results indicate that the proposed method could meet requirement and has little influence on power factor.
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