基于故障电压比较的广域后备保护新算法

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Abstract A novel wide area backup protection algorithm based on fault voltage comparison is presented in this paper, which is helpful to overcome the problems of conventional backup protection about complex setting and mal-operation under flow transfer. Measured voltage and current fault components from one terminal of transmission line are provided to estimate the voltage fault components of the other terminal. Then the fault element is identified by means of the ratio of measured and estimated value. Meanwhile, the speed of fault element identification can be accelerated by fault area detection scheme. This method depends on easy setting and lower demand to wide area data synchronism. The simulation test based on Chuan-yu 500kV grid test system showes the validity of proposed method under various complex conditions, such as high impedance earth fault, open-phase operation, evolved fault and flow transfer.

Key words： Fault element identification fault area detection fault voltage ratio coefficient limited wide area wide area backup protection

Received: 28 December 2010 Published: 20 March 2014

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TM77

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	Articles by authors
	He Zhiqin
	Zhang Zhe
	Yin Xianggen
	Wang Hua

Cite this article:

He Zhiqin,Zhang Zhe,Yin Xianggen等. A Novel Wide Area Backup Protection Algorithm Based on Fault Voltage Comparison[J]. Transactions of China Electrotechnical Society, 2012, 27(7): 274-283.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I7/274

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