Electrical Parameter Testing and Analysis of 35 kV Power Grid in Mountainous Area

LI Li-bo1; LIU Yu-gen2

doi:10.13296/j.1001-1609.hva.2011.08.022

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Electrical Parameter Testing and Analysis of 35 kV Power Grid in Mountainous Area

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- Electrical Parameter Testing and Analysis of 35 kV Power Grid in Mountainous Area
- High VoltageApparatus Vol. 47, Issue 8, Pages: 91-96(2011)
- 作者机构：
  
  1. 重庆市电力公司綦南供电局
  2. 重庆大学输配电装备及系统安全与新技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2011.08.022
  CLC： TM862
- Published：2011
- 稿件说明：
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[1]李历波,刘渝根.山区35kV电网电气参数测试及分析[J].高压电器,2011,47(08):91-96.

LI Li-bo1, LIU Yu-gen2. Electrical Parameter Testing and Analysis of 35 kV Power Grid in Mountainous Area[J]. High voltageapparatus, 2011, 47(8): 91-96.
[1]李历波,刘渝根.山区35kV电网电气参数测试及分析[J].高压电器,2011,47(08):91-96. DOI： 10.13296/j.1001-1609.hva.2011.08.022.

LI Li-bo1, LIU Yu-gen2. Electrical Parameter Testing and Analysis of 35 kV Power Grid in Mountainous Area[J]. High voltageapparatus, 2011, 47(8): 91-96. DOI： 10.13296/j.1001-1609.hva.2011.08.022.

摘要

为研究山区35 kV电网雷击跳闸事故原因

提出有效的防雷措施。通过对山区35 kV电网电气参数进行现场测试

为山区35 kV系统的计算研究、运行维护及设计等提供了实际参数。结果显示:山区35 kV电网其单相接地电容电流超过了10 A

应采用中性点经消弧线圈接地运行方式;由于线路不进行均匀换位

使得其线路三相对地电容不对称

从而导致中性点经消弧线圈接地系统

三相电压不对称

消弧线圈整定困难

不能同时满足失谐度整定和三相电压对称的要求。

Abstract

In order to study the causes of the lightning trip for 35 kV power grid in mountainous area

and to bring up effective lightning protection

the scene testing of electric parameter to 35 kV grounding grid in mountainous area is carried out and the actual parameter for the calculation

study

operation

maintenance and design of 35 kV system in mountainous area is gotten.The results show that the single phase grounding capacitive current of 35 kV power grid in mountain exceeds 10 A

so the neutral point for the 35 kV power system should be grounding through the arc suppression coil.Because the 35 kV transmission lines is not transposition

the capacitances to ground of the three conductors and the three phase voltages are asymmetry.It is difficult to select the arc suppressing coil winding to satisfy the requirements of system

and the suppressing coil cannot extinguish grounding arc effectively in fault.

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