Calculation of Potential Transfer Current for Equipotential Live Working of 1 000 kV Transmission Line Tension Tower

LONG Quan; WANG Shenhua; FENG Pinghui; LI Peng; WU Tian; PU Ziheng; FANG Chunhua

doi:10.13296/j.1001-1609.hva.2024.01.008

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Calculation of Potential Transfer Current for Equipotential Live Working of 1 000 kV Transmission Line Tension Tower

Research & Analysis | 更新时间：2025-04-26

- Calculation of Potential Transfer Current for Equipotential Live Working of 1 000 kV Transmission Line Tension Tower
- High Voltage Apparatus Vol. 60, Issue 1, Pages: 63-70(2024)
- 作者机构：
  
  1.三峡大学电气与新能源学院，湖北　宜昌　 443002
  2.湖北省输电线路工程技术研究中心，湖北　宜昌　 443002
  3.国网浙江省电力公司武义供电公司，浙江　金华　 321200
  4.国网浙江省电力公司湖州供电公司，浙江　湖州　 313000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51807110);Open Fund of State Key Laboratory of Power Grid Environmental Protection(GYW51201901076)
- DOI：10.13296/j.1001-1609.hva.2024.01.008
  CLC：
- Received：27 August 2023，
  
  Revised：10 November 2023，
  
  Published：16 January 2024
- 稿件说明：
移动端阅览
LONG Quan, WANG Shenhua, FENG Pinghui, et al. Calculation of Potential Transfer Current for Equipotential Live Working of 1 000 kV Transmission Line Tension Tower[J]. High voltage apparatus, 2024, 60(1): 63-70.
DOI：

LONG Quan, WANG Shenhua, FENG Pinghui, et al. Calculation of Potential Transfer Current for Equipotential Live Working of 1 000 kV Transmission Line Tension Tower[J]. High voltage apparatus, 2024, 60(1): 63-70. DOI： 10.13296/j.1001-1609.hva.2024.01.008.

摘要

特高压输电线路等电位带电作业过程中会出现电弧放电，产生高幅值、高能量的脉冲电流，因此提出准确的转移电流计算方法对作业人员的安全防护具有重要意义。文中提出了基于电弧模型的电位转移电流计算方法，可对进入等电位的过程进行模拟。基于PSCAD平台建立了1 000 kV输电线路耐张塔等电位带电作业电位转移电流计算模型，同时分析了进入等电位的方式及速度对转移电流的影响。仿真与实测结果基本一致，表明该计算模型能够有效反映电位转移电流的动态变化特性。采用软梯法获得的转移电流峰值更小，提高进入等电位速度，可有效降低电位转移电流幅值。

Abstract

Arc discharge occurs in the process of equipotential live working of UHV transmission lines

resulting in high amplitude and high energy pulse current. Hence

it is of great significance to propose an accurate calculation method of transfer current for safe protection of operators. A calculation method of potential transfer current based on the arc model is proposed in this paper

which can simulate the process of entering the equipotential. Based on the PSCAD platform

the calculation model of potential transfer current in equipotential live working of 1 000 kV transmission line tension tower is set up. At the same time

the influence of entering the equipotential method and speed on the transfer current is analyzed. The simulation and measured results are basically identical

indicating that the calculation model can effectively reflect the dynamic change characteristics of potential transfer current. The peak value of transfer current obtained by the soft ladder method is smaller

and the amplitude of the potential transfer current can be effectively reduced by increasing the speed of entering the equipotential.

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