Study on Electric Field Distribution of ±800 k V Butt Joint Type DC Wall Bushings Based on Different Core Design Methods

DENG Jun; WANG Qingyu; PENG Zongren; LIU Peng; JIN Shoufeng; TIAN Huidong

doi:10.13296/j.1001-1609.hva.2018.10.002

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Study on Electric Field Distribution of ±800 k V Butt Joint Type DC Wall Bushings Based on Different Core Design Methods

更新时间：2025-04-26

- Study on Electric Field Distribution of ±800 k V Butt Joint Type DC Wall Bushings Based on Different Core Design Methods
- High VoltageApparatus Vol. 54, Issue 10, Pages: 8-14(2018)
- 作者机构：
  
  1. 南方电网超高压输电公司检修试验中心
  2. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.10.002
  CLC： TM216.5
- Published：2018
- 稿件说明：
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[1]邓军,王青于,彭宗仁,刘鹏,靳守锋,田汇冬.基于不同心体设计方法的±800 kV对接式直流穿墙套管电场分布规律研究[J].高压电器,2018,54(10):8-14.

DENG Jun, WANG Qingyu, PENG Zongren, et al. Study on Electric Field Distribution of ±800 k V Butt Joint Type DC Wall Bushings Based on Different Core Design Methods[J]. High voltageapparatus, 2018, 54(10): 8-14.
[1]邓军,王青于,彭宗仁,刘鹏,靳守锋,田汇冬.基于不同心体设计方法的±800 kV对接式直流穿墙套管电场分布规律研究[J].高压电器,2018,54(10):8-14. DOI： 10.13296/j.1001-1609.hva.2018.10.002.

DENG Jun, WANG Qingyu, PENG Zongren, et al. Study on Electric Field Distribution of ±800 k V Butt Joint Type DC Wall Bushings Based on Different Core Design Methods[J]. High voltageapparatus, 2018, 54(10): 8-14. DOI： 10.13296/j.1001-1609.hva.2018.10.002.

摘要

环氧树脂浸渍干式对接结构穿墙套管内绝缘由两个换流变干式套管电容芯体尾部对接而成

复合绝缘外套与电容芯体之间充SF6气体。电容套管的内绝缘即电容芯子为电气设计计算的关键部件

目前对电容式套管的主绝缘设计大多采用等电容和等裕度设计方法

两种芯子设计方法下对对接式直流穿墙套管的电场分布有不同的影响

因此讨论基于解析式的电容式套管内绝缘等电容和等裕度设计方法

仿真计算对接式直流穿墙套管不同芯子设计方法下的电场分布

得出对接式直流穿墙套管在不同芯子设计方法下的电场分布规律

发现等裕度设计方法局部放电起始电压比等电容法提高了

这对保障对接式直流穿墙套管的安全稳定运行具有重要意义。

Abstract

The inner insulation of epoxy resin impregnated dry butt joint structure wall bushings is butted by two con-verter transformer dry-type bushing capacitor cores;between the composite insulation sheath and capacitor the coreare filled with SF6 gas. The the internal insulation capacitor core of capacitor bushings is the key components of elec-trical design

the current main insulation design methods of capacitive bushings are equal capacitance and equalmargin design methods

the two core design methods have different effect on the electric field distribution of the DCwall bushings. Therefore

discuss the equal capacitance and equal margin design methods based on the analytical ex-pressions

simulate the distribution of the electric field on the different main insulation design methods of the DCwall bushing

obtain the distribution of the electric field for different main insulation design methods and find thatpartial discharge starting voltage of equal margin design method is higher than that of equal capacitance method

which are of great importance for the safe and stable operation of the DC wall bushing.

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