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张俊,沈国桥,胡长生,徐德鸿.间歇性双边无功功率扰动孤岛检测策略[J].电源学报,2011,9(2):7-11
间歇性双边无功功率扰动孤岛检测策略
Intermittent Bilateral Reactive Power Variation Islanding Detection Strategy
投稿时间:2011-01-06  修订日期:2011-01-15
DOI:10.13234/j.issn.2095-2805.2011.2.7
中文关键词:  并网逆变器  孤岛  无功功率扰动  非检测区
英文关键词:grid-connected inverter  islanding  reactive power variation  none detection zone
基金项目:国家高科技研究发展计划(863计划)(2007AA05Z243)
作者单位E-mail
张俊 浙江大学电气工程学院电力电子技术研究所 zjuzj@zju.edu.cn 
沈国桥 浙江大学电气工程学院电力电子技术研究所 shenguoqiao@zju.edu.cn 
胡长生 浙江大学电气工程学院电力电子技术研究所  
徐德鸿 浙江大学电气工程学院电力电子技术研究所 xdh@zju.edu.cn 
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中文摘要:
      孤岛检测是分布式并网发电系统的必备功能,因为孤岛的发生一般不可预测且危害极大。分析了恒功率控制模式下的并网逆变器在孤岛运行时的电压和频率,计算得出逆变器输出含无功时的非检测区。然后,给出了间歇性双边无功功率扰动的孤岛检测方法,得到消除非检测区的条件并设计了扰动参数。最后进行实验验证,结果表明该孤岛检测策略满足检测要求,对并网功率因数影响很小。
英文摘要:
      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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