Analysis on Unbalance Factor of Electrical Parameters for 500 kV Double-circuit Cable Line with Vertical Arrangement

WANG Xiaotong; XIANG Zutao; SONG Xinli; YANG Haifang

doi:10.13296/j.1001-1609.hva.2017.02.021

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Analysis on Unbalance Factor of Electrical Parameters for 500 kV Double-circuit Cable Line with Vertical Arrangement

更新时间：2025-04-26

- Analysis on Unbalance Factor of Electrical Parameters for 500 kV Double-circuit Cable Line with Vertical Arrangement
- High VoltageApparatus Vol. 53, Issue 2, Pages: 132-138(2017)
- 作者机构：
  
  中国电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.02.021
  CLC： TM75
- Published：2017
- 稿件说明：
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[1]王晓彤,项祖涛,宋新立,杨海芳.采用垂直排列的500kV双回电缆线路参数的不平衡度分析[J].高压电器,2017,53(02):132-138.

WANG Xiaotong, XIANG Zutao, SONG Xinli, et al. Analysis on Unbalance Factor of Electrical Parameters for 500 kV Double-circuit Cable Line with Vertical Arrangement[J]. High voltageapparatus, 2017, 53(2): 132-138.
[1]王晓彤,项祖涛,宋新立,杨海芳.采用垂直排列的500kV双回电缆线路参数的不平衡度分析[J].高压电器,2017,53(02):132-138. DOI： 10.13296/j.1001-1609.hva.2017.02.021.

WANG Xiaotong, XIANG Zutao, SONG Xinli, et al. Analysis on Unbalance Factor of Electrical Parameters for 500 kV Double-circuit Cable Line with Vertical Arrangement[J]. High voltageapparatus, 2017, 53(2): 132-138. DOI： 10.13296/j.1001-1609.hva.2017.02.021.

摘要

线路参数的平衡性对电网的安全运行有着重要影响。文中采用电磁暂态仿真程序（EMTP）

对采用垂直排列时双回电缆线路参数的不平衡度进行了计算和分析。结果表明

若电缆线路不换位、仅将金属护套交叉互联

则会显著增加电缆线路的电磁不平衡度;而电缆线路换位、且将金属护套交叉互联

则不同相序下的电磁不平衡度均很低。为了保证线路参数的平衡性

相序ABC/ABC、ABC/BCA、ABC/CAB下两回线路的换位方向应相同

而相序ABC/CBA、ABC/BAC、ABC/ACB下两回线路的换位方向应相反。从降低线路参数不平衡度的角度看

无论电缆线路是否换位

逆相序都是最佳的选择。

Abstract

The software EMTP is adopted to calculate and analyze the unbalance factor of electrical parameters of a 500 kV double-circuit cable line with vertical arrangement. The results show that if metal sheathes are cross-connected for untransposed cable lines

the electromagnetic unbalance factor will significantly increase

however

if metal sheathes are cross-connected for transposed cable lines

the electromagnetic unbalance factor values under different phase sequence arrangements will become rather small. In order to ensure the balance of the line parameters

the transposition directions of the double-circuit cable lines should be the same for the phase sequence arrangement ABC/ABC

ABC/BCA and ABC/CAB

while the transposition directions of the double-circuit cable lines should be opposite for the phase sequence arrangement ABC/CBA

ABC/BAC and ABC/ACB. In view of reducing unbalance factor of the line parameters

inverse phase sequence arrangement is the best choice whether the cable lines are transposed or not.

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