基于低频电气量的超高压交流线路出口故障快速保护

doi:10.19595/j.cnki.1000-6753.tces.190483

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Abstract To increase the operation speed of relays under the outgoing line fault conditions, this paper proposed a high-speed operation strategy based on the low-frequency transient component. The proposed method consists of two parts: the high-speed directional element and the fast outgoing line fault detection element. The measurement voltage drop and calculation voltage drop on the system equivalent impedance from relay location to backside equivalent power sources are introduced to detect the fault direction. By comparing the integration of the absolute values of residual voltage and setting voltage during a short time after the fault, the outgoing fault can be detected rapidly. The main advantage of the proposed method is its high reliability, because this method would not be affected by the high-frequency component. To overcome the impact of the capacitor voltage transformer transient characteristics on the outgoing line fault detection element, an effective method based on equal transfer processes is also presented. Finally, an extensive performance evaluation using PSCAD/EMTDC simulation corroborates the effectiveness of the proposed method. Simulation results show that the proposed method has the high operation speed under the outgoing line fault conditions.

Key words： Outgoing line faults high speed protection low frequency components time domain

Received: 25 April 2019

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TM71

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	Chen Yu
	Wen Minghao
	Wang Zhen
	Yin Xianggen
	Yang Lin

Cite this article:

Chen Yu,Wen Minghao,Wang Zhen等. A High Speed Protection Scheme for Outgoing Line Fault of HVAC Transmission Lines Based on Low Frequency Components[J]. Transactions of China Electrotechnical Society, 2020, 35(11): 2415-2426.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190483 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I11/2415

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