基于计算电阻的高压直流输电线路纵联保护

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Abstract Since the traditional current differential protection for high voltage direct current (HVDC) is significantly influenced by distributed capacitance and of poor reliability, a novel pilot protection algorithm based on calculated resistance is proposed. The calculated resistance is calculated by using the dc component of fault component at both terminals of the line. When internal faults occur, the calculated resistance is relatively low; when external faults occur, the calculated resistance is very high. Upon the basis of that, faulted pole can be identified by the calculated power accurately. The proposed scheme is insensitive to the sampling frequency and independent of distributed capacitive current. Meanwhile, the setting principle can be set in a simple and clear way. Theoretical analysis and comprehensive simulation experiments showed that it operates with high reliability and selectivity under different fault conditions with high fault resistance. In addition, its validity has been verified by real time digital simulator (RTDS) and field data test.

Key words： High voltage direct current(HVDC) transmission line calculated resistance pilot protection DC component fault component network

Received: 18 January 2016 Published: 17 April 2017

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TM773

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	Yang Yayu
	Tai Nengling
	Fan Chunju
	Liu Jian

Cite this article:

Yang Yayu,Tai Nengling,Fan Chunju等. A Pilot Protection Scheme for HVDC Transmission Lines Based on Calculated Resistance[J]. Transactions of China Electrotechnical Society, 2017, 32(7): 84-94.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I7/84

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