基于下垂特性锁相环的反孤岛性能分析

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Abstract The grid-connected inverter which employs phase lock loop (PLL) with drooped characteristic can obtain unity power factor. However, the islanding can’t be detected when the resonant frequency of parallel RLC load is in the range of normal power grid frequency. Compared to other islanding detecting method, this zone is relatively larger. In order to decrease the NDZ, an improved PLL is proposed, which introduces a phase difference disturbance to the drooped PLL. The principle of parameters selecting is given and the NDZ of the improved PLL strategy is significant decreased. The simulation and experimental results verify that the proposed method is effective for islanding detection without affecting the quality of grid current.

Key words： Grid-connected inverter droop characteristic PLL phase difference disturbance islanding NDZ

Received: 15 April 2011 Published: 25 March 2014

PACS:

TM464

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	Articles by authors
	Kan Jiarong
	Luo Yunhu
	Xie Shaojun
	Gu Chunlei
	Wu Yunya
	Yao Zhilei

Cite this article:

Kan Jiarong,Luo Yunhu,Xie Shaojun等. Analysis with Anti-Islanding Performance of Grid-Connected Inverters Based on Drooped PLL[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 165-170.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I4/165

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