摘要
孤岛检测是光伏发电系统必备的功能。传统的无源孤岛检测方法存在检测盲区,有源孤岛检测方法虽然可减小甚至消除检测盲区,但存在降低供电质量的缺点。为消除检测盲区并最大程度地减小对供电质量的影响,本文提出一种基于无功微扰/频率偏差相关度判别的孤岛检测方法。该方法引入的无功扰动非常微小并且周期长,因此对供电质量影响极小。仿真结果表明,文中的方法具有响应速度快、无检测盲区,对供电质量影响极小等优点。
Islanding detection is one of the indispensable function of photovoltaic power generation system.The traditional passive islanding detection has detection blind zone,and the active islanding detection may reduce or even eliminate the blind zone,but also reduce the power quality.To eliminate the detection blind zone and minimize the effect on the power quality,a noval islanding detection method based on the relevance judgement between reactive minor disturbance and frequency deviation.The reactive disturbance is extremely small and has a long period,hence the effect on power quality is very small.Simulation result shows the method given have fast response speed,non-blind zone and have very small impact on power quality.
出处
《南方电网技术》
2010年第A01期130-133,共4页
Southern Power System Technology
基金
国家自然科学基金项目(50977081)
云南省科技厅基金项目(2008KA006)
关键词
孤岛检测
检测盲区
无功扰动
频率偏差
相关度
islanding detection
detection blind zone
reactive power disturbance
frequency deviation
relevance
