一种抗电流互感器饱和的工频变化量保护新方案

doi:10.19595/j.cnki.1000-6753.tces.180320

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Abstract Current transformer (CT) saturation will lead to the failure to operate for traditional power frequency variation protection when a fault occurs on line, in order to solve this problem, this paper analyzes the relationship between the frequency variation protection working voltage and system impedance, fault current variation and effect of current transformer saturation on power frequency variation protection operation characteristics, and a novel scheme based on the system maximum and minimum setting impedance power frequency variation protection scheme resisting CT saturation is proposed. Theoretical analysis and PSCAD based simulation verification show that the algorithm can not only maintain the operation performance of the original power frequency variation, but also can act accurately operate under CT saturation.

Key words： Current transformer saturation frequency variation refuse to operate system impedance variation of failure current

Received: 12 March 2018 Published: 26 September 2018

PACS:

TM773

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	Articles by authors
	Jin Neng
	Xing Jiawei
	Lin Xiangning
	Chen Dunhui
	Liu Shiming

Cite this article:

Jin Neng,Xing Jiawei,Lin Xiangning等. A New Scheme of Frequency Variation Protection Resisting Current Transformer Saturation[J]. Transactions of China Electrotechnical Society, 2018, 33(zk1): 213-220.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180320 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/Izk1/213

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