容错控制技术在频率偏移法孤岛效应检测中的应用
Application of Fault Tolerant Control Technology in the Detection of Isolated Island Effect of Frequency Offset Method

DOI: 10.12677/TDET.2015.44012, PP. 112-123

Keywords: 孤岛效应，频率偏移法，容错控制技术
Island Effect, Frequency Offset Method, Fault Tolerant Control Technology

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Abstract:

孤岛效应检测在并网光伏发电系统中具有重要的意义，特别是在逆变器输出与负载功率相匹配时，被动式检测不能有效地检测出孤岛效应，因此在频率偏移法的基础上进行改进，引入正反馈系数，进一步减小检测盲区，同时，在该方法中加入容错控制技术，对传感器的检测信号进行故障判断，提高孤岛检测的快速性和可靠性。
The detection of the island effect is of great significance in the grid connected photovoltaic power generation system, especially when the output of inverter is matching with the load and passive detection cannot detect islanding effectively. So the improvement is made based on the frequency offset method. Positive feedback coefficient is introduced to further reduce the detection blind area. At the same time, the fault tolerant control technology is added in this method. It could estimate fault of the sensor signal, improve the rapidity and reliability of the island detection.

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