Ms. Zhou Huan Profile

Zhou Huan

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Proceedings Article | 18 July 2023 Paper

Single-phase grounding fault location method based on iteration thought for double circuit transmission lines

YiMing Zhu, Huan Zhou, Xuan Gao

Proceedings Volume 12722, 1272216 (2023) https://doi.org/10.1117/12.2679314

KEYWORDS: Resistance, Inductance, Computer simulations, Electromagnetic coupling, Power grids, Phase measurement, MATLAB, Engineering

Read Abstract +

There is strong electromagnetic coupling in DCTL (double circuit transmission lines on the same tower), especially strong zero-sequence mutual inductance, which leads to the fact that the fault location error of the single-ended single-circuit line configuration for distance protection is large. The existing method, which cannot fundamentally eliminate the influence of zero-sequence mutual inductance of adjacent lines, estimates the zero-sequence current of adjacent lines instead of collecting voltage and current of adjacent lines directly. Therefore, a single-phase grounding fault location method for DCTL that based on Newton iteration thought is proposed. This method uses Newton iteration method to improve the zero-sequence current estimation accuracy of adjacent lines, and the location of single-phase grounding fault can be calculated accurately only by using the electric quantities of single circuit line. The PSCAD/EMTDC simulation verifies the effectiveness of the method.

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