同杆并架线路阻抗比横联差动保护研究

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Abstract Traditional current transverse differential protection has low sensitivity and long successive operating zone.So it has shortages when applied to the high-voltage and electrical parameters asymmetry power systems.A new transverse differential protection based on the ratio of measurement impedance,i.e.the sum of measurement impedance to the difference between the measurement impedance,is proposed.The proposed scheme is unaffected by system impedance to a large extent,and has a short successive operation zone.The paper analyzes the reason for this and completes simulation research.Theoretical analysis and PSCAD/EMTDC simulation show that,compared with traditional current transverse differential protection,the ratio of measurement impedance can decrease the successive operating zone obviously.The proposed integrated protection scheme is simple,rapid,reliable,and easy to realize.

Key words： Double circuit lines on the same tower electrical parameters asymmetry line the ratio of impedance transverse differential fault line selection successive operating zone

Received: 07 June 2015 Published: 21 November 2016

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TM77

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	Li Shilong
	Chen Wei
	Zou Yao
	Yin Xianggen
	Chen Deshu

Cite this article:

Li Shilong,Chen Wei,Zou Yao等. Transverse Differential Protection Based on the Ratio of Impedance for Double Circuit Lines on the Same Tower[J]. Transactions of China Electrotechnical Society, 2016, 31(21): 21-29.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I21/21

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