Voltage Grading Optimization Strategy for Large Grounding Grid Based on Security

LI Qian; WEN Xishan

doi:10.13296/j.1001-1609.hva.2018.06.027

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Voltage Grading Optimization Strategy for Large Grounding Grid Based on Security

更新时间：2025-04-26

- Voltage Grading Optimization Strategy for Large Grounding Grid Based on Security
- High VoltageApparatus Vol. 54, Issue 6, Pages: 177-183(2018)
- 作者机构：
  
  1. 广东电网有限责任公司电力科学研究院
  2. 武汉大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.06.027
  CLC： TM862
- Published：2018
- 稿件说明：
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[1]李谦,文习山.基于安全性的大型接地网均压优化策略[J].高压电器,2018,54(06):177-183.

LI Qian, WEN Xishan. Voltage Grading Optimization Strategy for Large Grounding Grid Based on Security[J]. High voltageapparatus, 2018, 54(6): 177-183.
[1]李谦,文习山.基于安全性的大型接地网均压优化策略[J].高压电器,2018,54(06):177-183. DOI： 10.13296/j.1001-1609.hva.2018.06.027.

LI Qian, WEN Xishan. Voltage Grading Optimization Strategy for Large Grounding Grid Based on Security[J]. High voltageapparatus, 2018, 54(6): 177-183. DOI： 10.13296/j.1001-1609.hva.2018.06.027.

摘要

网内电位差是与接地网均压性能紧密联系的大型接地网重要的安全性指标

针对以往接地网设计和运行实践中

对该指标对二次系统运行的影响关注不足的问题

文中探讨了工频条件下基于安全性的大型接地网均压要求

指出网内电位差控制值应以二次设备的工频耐受为校核原则

并基于二次设备工频耐受特性试验给出网内电位差控制推荐值（1 000 V）

提出均压优化策略并给出应用案例

对于变电站、电厂和换流站等大型接地网设计和运行维护具有较好的指导价值。

Abstract

The potential difference in the grid is an important safety index for the large grounding grid connected with the grounding grid voltage grading performance. In this paper

the requirement of the voltage grading of large grounding grid based on the safety of power frequency is discussed. It is pointed out that the control value of potential difference in the grid should use the power frequency withstand of the secondary equipment as the checking principle. Based on the power frequency withstand test of the secondary devices

the recommended value（1 000 V）of the potential difference in the grid is given

and the optimization strategy of the voltage grading is put forward

and an application case is given. It has a good guiding value for the design and operation and maintenance of large grounding grid

such as substation

power plant and converter station.

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