基于单端电气量的不对称参数同塔四回线选相方法

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Abstract The asymmetrical quadruple-circuit lines have different self-inductances, which cannot be decoupled by the twelve-sequence-component method. Phase-Line decouple method is adopted to eliminate the mutual inductance, and convert the original phase currents into 12 different independent current components. When a line fault occurs, the boundary conditions help to find out the relationship between the current components. If a fault occurs on different lines, the across components and loop components are in the same or inverse phase. The amplitudes of the components are the same while the phases are shifted a special angle during the same kind of fault on the different phase of same line. Considering the influence of the distributed factors, a fault phase selection method for asymmetrical quadruple-circuit lines is presented, flow chart for fault phase is also provided. The PSCAD/EMTDC simulation results show that this method is suitable for fault phase selection, and the fault location and fault resistance has little influence on this method.

Key words： Asymmetrical parameter quadruple line on the same tower line selection phase selection sequence component single terminal electric quantities

Published: 03 March 2016

PACS:

TM773

Fund:国家自然科学基金资助项目（51177066、51377104）

Corresponding Authors: 刘琦男,1987年生,博士研究生,研究方向为电力系统保护与控制。E-mail: LiuQi8165@163.com

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	Liu Qi
	Tai Nengling
	Fan Chunju
	Yu Zhongan
	Shang Jin

Cite this article:

Liu Qi,Tai Nengling,Fan Chunju等. Fault Phase Selection Scheme for Quadruple-Circuit Transmission Lines with Asymmetrical Parameter Based on Single-Ended Electrical Quantities[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 178-186.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I4/178

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