Study on the Effect of Vertical Rod on Reducing Tower’s Impulse Grounding Resistance

GAO Zhuqing; CAO Xiaobin; DU Junle; TIAN Mingming

doi:10.13296/j.1001-1609.hva.2018.04.027

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Study on the Effect of Vertical Rod on Reducing Tower’s Impulse Grounding Resistance

更新时间：2025-04-26

- Study on the Effect of Vertical Rod on Reducing Tower’s Impulse Grounding Resistance
- High VoltageApparatus Vol. 54, Issue 4, Pages: 182-187(2018)
- 作者机构：
  
  1. 国网山东省电力公司潍坊供电公司
  2. 西南交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.04.027
  CLC： TM862
- Published：2018
- 稿件说明：
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[1]高竹青,曹晓斌,杜俊乐,田明明.垂直接地极对杆塔冲击接地电阻的影响研究[J].高压电器,2018,54(04):182-187.

GAO Zhuqing, CAO Xiaobin, DU Junle, et al. Study on the Effect of Vertical Rod on Reducing Tower’s Impulse Grounding Resistance[J]. High voltageapparatus, 2018, 54(4): 182-187.
[1]高竹青,曹晓斌,杜俊乐,田明明.垂直接地极对杆塔冲击接地电阻的影响研究[J].高压电器,2018,54(04):182-187. DOI： 10.13296/j.1001-1609.hva.2018.04.027.

GAO Zhuqing, CAO Xiaobin, DU Junle, et al. Study on the Effect of Vertical Rod on Reducing Tower’s Impulse Grounding Resistance[J]. High voltageapparatus, 2018, 54(4): 182-187. DOI： 10.13296/j.1001-1609.hva.2018.04.027.

摘要

雷击输电线路杆塔时

杆塔接地装置的冲击电阻过大是造成雷电反击跳闸的主要原因。针对如何利用垂直接地极有效降低杆塔冲击接地电阻这一问题

文中建立典型杆塔接地装置仿真模型

研究了不同长度垂直接地极的影响范围;垂直接地极数量、长度对于杆塔接地装置降阻效果的影响。通过研究发现

不同长度垂直接地极影响范围不同:10 m长垂直接地极的影响范围大约为40 m

而3 m和5 m长垂直接地极的影响范围分别为5 m和20 m;在所添加垂直接地极总长度相同的情况下

所采用单根垂直接地极的长度越长

则降阻效果越好;随着垂直接地极数量的增加

其降阻率都不断趋向饱和。推荐在泄漏电流弱的地方添加尽可能长的垂直接地极

然后再根据其影响范围增加合适的垂直接地极数量。该结论可为杆塔接地体的设计及改造提供参考。

Abstract

When lightning current striking the tower

the main cause of lightning trip-out is large impulse resistanceof the tower grounding device. In view of how to use the vertical rod to reduce the impulse grounding resistance of tow-er

this paper establishes simulation model of typical tower grounding device to study the influence scope of differentlength vertical rod

the number and length of vertical grounding electrodes influence on resistance reducing effect.Through the study found that the different length of the vertical rod affects different area-the influence scope of 10 me-ter vertical rod is about 40 m

however

the influence scope of 3 m and 5 m vertical rod is about 5 m and 20 m respec-tively. When the total length of vertical grounding electrode under the same condition

the length of the vertical rod islonger

the resistance reduction effect is the better. With the increase in the number of vertical grounding electrodes

the resistance-reducing ratio is always saturated. This paper recommended that adding as much as possible long verti-cal rod at the place which the leakage current is weak

then according to the vertical rod’s impact area to increasethe right number of vertical rod. This conclusion can provide technical reference for the design and reconstruction ofthe tower grounding device.

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