Title: Monitoring method of high voltage power system's leapfrog tripping prevention based on differential protection

Authors: Jing Yuan; Pei Li; Zhifei Jiang; Hongfei Chen; Xurui Wu

Addresses: Department of Information and Electronic Engineering, Shangqiu Institute of Technology, Shangqiu, 476000, China ' Department of Information and Electronic Engineering, Shangqiu Institute of Technology, Shangqiu, 476000, China ' Department of Information and Electronic Engineering, Shangqiu Institute of Technology, Shangqiu, 476000, China ' Huaneng Renewables Co. Ltd., Guangdong Branch, Guangzhou, ICC, 510610, China ' Huaneng Renewables Co. Ltd., Guangdong Branch, Guangzhou, ICC, 510610, China

Abstract: In order to solve the problems of large relative monitoring error and large fluctuation of monitoring information acquisition frequency existing in traditional methods, this paper proposes a monitoring method based on differential protection to prevent leapfrog tripping for high voltage power system. First, the tripping fault features are extracted and the monitoring points for preventing leapfrog tripping are arranged. Then, determine whether the pilot differential protection is enabled by judging whether the leapfrog tripping fault may occur in the monitoring area. Finally, based on the action of pilot differential protection, the power system information is summarised, and the monitoring is carried out for leapfrog tripping. The experiment shows that the relative monitoring error of the method is always below 2.0%, and the acquisition frequency after adding stray harmonic interference is stable between 0.50 Mbps and 0.60 Mbps, which shows that the method effectively realises the design expectation.

Keywords: high voltage power system; leapfrog tripping fault; fault monitoring; differential protection; fault current.

DOI: 10.1504/IJPEC.2023.134870

International Journal of Power and Energy Conversion, 2023 Vol.14 No.2/3, pp.121 - 132

Received: 09 Dec 2022
Accepted: 21 Apr 2023
Published online: 15 Nov 2023 *

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