基于工频畸变信号的分布式发电孤岛检测  

A Power Frequency Distortion Signal-Based Method for Islanding Detection of Distributed Power Generation

作　　者：黄毕尧[1] 李建岐[1] 权楠[1] 刘国军[1] 王智慧[1] 渠晓峰[1] 熊晓方 钟丽梅 王凯睿 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]南昌供电公司,江西省南昌市330006

出　　处：《电网技术》2011年第5期188-193,共6页Power System Technology

基　　金：国家电网公司重点科技项目(SGKJ[2007]111);中国电力科学研究院青年科研基金项目(TX84-09-001)的资助

摘　　要：分布式发电以及微电网中的孤岛检测是新能源并网的重要技术问题。工频畸变是一种特殊的电力线通信信号,把工频畸变信号应用到孤岛检测中,对信号经过配电网传输后的耦合特征和振荡特征进行分析,并基于此提出信号的硬件合成方法,计算信号偶次谐波特征值。采用自行研制的嵌入式硬件检测装置在现场对上述方法进行了测试,结果表明基于工频畸变信号的孤岛检测方法检测可靠性高、无检测盲区,具有重要的应用价值。Islanding detection for distributed power generation and microgrid is an important technical problem in the connection of new energy with power grid. As kind of special power line communication signal, the power frequency distortion signal is applied in the islanding detection. The coupling feature and oscillation characteristic of power frequency distortion signal transmitted through distribution network are analyzed and on this basis a method to synthesize this kind of signal by hardware is proposed, then an algorithm to calculate characteristic values of even harmonics of the signal is given. The on-site testings of the proposed method are performed by self-developed embedded hardware detection device, and testing results show that the proposed method possesses high detecting reliability and there is no non-detection zone in the detected range, so this method is available to anti-islanding protection for grid-connected distributed generation.

关 键 词：分布式发电 微电网 工频畸变 孤岛检测 配电网 

分 类 号：TM73[电气工程—电力系统及自动化] TM77