提升配电网线路保护可靠性的远方保护及其与就地保护优化配合方案研究

doi:10.19595/j.cnki.1000-6753.tces.181467

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Abstract In the distribution network, the overcurrent protection is often single-configured for line protection, which has low reliability and is vulnerable to the sampling link. In addition, as many distributed generations (DGs) are connected to the distribution network, the protection range of instantaneous overcurrent protection is significantly reduced. Therefore, based on the current information of the line and the back side of the connected busbar, this paper proposes a highly reliable remote protection redundancy tripping logic with anti-sampling anomaly capability by constructing multiple differential protection criteria. The protection criteria use a superfast pilot protection algorithm to shorten the calculation time, which can provide sufficient time for information uploading, sending and processing, so as to realize the effective coordination of remote protection and local protection. In addition, considering the communication delay and the influence of accidentally collision of terminals or cyber-attack, the protection tripping logic based on smart circuit breaker is proposed, and the optimal coordination strategy of local protection and remote protection is designed. The theoretical analysis and simulation results verify that the proposed strategy can effectively deal with the abnormities of sampling, such as interference, saturation and disconnection of single transformer and cyber-attack, while improving the protection reliability of distribution network.

Key words： Distribution network sampling abnormity remote protection cyber-attack redundancy tripping logic optimal coordination

Received: 10 September 2018 Published: 30 December 2019

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TM771

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	Jin Neng
	Liang Yu
	Xing Jiawei
	Rong Zirui
	Lin Xiangning

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Jin Neng,Liang Yu,Xing Jiawei等. Research on Remote Protection and the Optimized Coordination Scheme of Local-Remote Protection to Enhance the Protection Reliability of the Line in Distribution Network[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5221-5233.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181467 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I24/5221

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