Study on the Influence of Tidal Geoelectrical Field on GIC Calculation of Power Grid

TANG Bo; ZHAN Dongbo; YANG Jiawei; LI Bocheng; ZHANG Nan

doi:10.13296/j.1001-1609.hva.2021.04.017

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Study on the Influence of Tidal Geoelectrical Field on GIC Calculation of Power Grid

更新时间：2025-04-26

- Study on the Influence of Tidal Geoelectrical Field on GIC Calculation of Power Grid
- High VoltageApparatus Vol. 57, Issue 4, Pages: 112-119(2021)
- 作者机构：
  
  1. 三峡大学电气与新能源学院
  2. 三峡大学湖北省输电线路工程技术研究中心
  3. 国网绍兴供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.04.017
  CLC： TM744
- Published：2021
- 稿件说明：
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[1]唐波,詹东博,杨嘉炜,李勃铖,张楠.潮汐地电场对电网GIC计算的影响研究[J].高压电器,2021,57(04):112-119.

TANG Bo, ZHAN Dongbo, YANG Jiawei, et al. Study on the Influence of Tidal Geoelectrical Field on GIC Calculation of Power Grid[J]. High voltageapparatus, 2021, 57(4): 112-119.
[1]唐波,詹东博,杨嘉炜,李勃铖,张楠.潮汐地电场对电网GIC计算的影响研究[J].高压电器,2021,57(04):112-119. DOI： 10.13296/j.1001-1609.hva.2021.04.017.

TANG Bo, ZHAN Dongbo, YANG Jiawei, et al. Study on the Influence of Tidal Geoelectrical Field on GIC Calculation of Power Grid[J]. High voltageapparatus, 2021, 57(4): 112-119. DOI： 10.13296/j.1001-1609.hva.2021.04.017.

摘要

当前电网地磁感应电流（geomagnetically induced current

GIC）的计算值同实测值之间存在巨大误差

影响地磁暴下GIC的防护工作实施。为获取误差产生的根源

结合GIC和感应地电场的形成机理

提出潮汐地电场（tidal geoelectrical field

TGF）是造成GIC计算误差的重要影响因子。给出了TGF作用电网的可行性求解方法

并推导了GIC在地心坐标系计算中的数学表达式。最后

以甘肃兰州地区为研究对象

通过建立局部电网直流等效模型

采用数值仿真方法计算了TGF引起的电网GIC水平。与同地区其他文献计算结果对比

TGF单独作用下产生的GIC数值最大占比地磁暴期间GIC计算值的18.8%

因此后续进行GIC的求解与分析时

必须考虑TGF的影响。

Abstract

The huge error between the calculated and actually measured value of geomagnetically induced current（GIC）is existed in the present power grid

which affects the implementation of GIC protection under geomagnetic storms. For obtaining the source of the error

it is proposed with combination the formation mechanism of GIC and induced geoelectrical field that Tidal Geoelectrical Field（TGF）is an important factor that causes GIC calculation errors. The feasible solution method of TGF acting on the power grid is given and the mathematical expression of GIC in the calculation of the geocentric coordinate system is deduced. Finally

the Lanzhou area of Gansu province is taken as the study object

the CIC level of power grid due to TGF is calculated by way of DC equivalent model of setting up local power grid and by the use of numerical simulation method. Compared with the calculation results of other reference in the same area

the maximum ratio of GIC generated under action of TGF itself accounts for 18.8% of the calculation value of GIC during the geomagnetic storm. Therefore

in case of the subsequent GIC solution and analysis of GIC

the influence of TGF must be under consideration.

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