Non-Isolated Photovoltaic Grid Inverter Island Detection Method

doi:10.11930/j.issn.1004-9649.2017.06.135.05

Abstract

Abstract: The traditional non-isolated photovoltaic(PV) grid inverter island detection methods has strong limitation and instable performance. A new island detection method based on frequency shift theory is proposed. Islanding causes and detection specificationare analyzed in detail in order to build detection model. The islanding detection circuit proposed in the model is based on frequency shift theory. The voltage and frequency signal of inverters are collected after active jamming to identify inverters with islanding effect. After detection, the model circuit chip is called to cut inverter output and prevent spread of islanding. The experimental results show that the proposed method has strong ability to detect islanding. It is a good supplement of islanding detection blind area.

Key words: PV, non-isolated, photovoltaic grid connected, inverter, an island detection

CLC Number:

TM615

WANG Zhouhong, HONG Lei, REN Ying, XIE Huili. Non-Isolated Photovoltaic Grid Inverter Island Detection Method[J]. Electric Power, 2017, 50(6): 135-139.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.06.135.05

https://www.electricpower.com.cn/EN/Y2017/V50/I6/135

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