Optimization and Analysis on the Key Insulation Structure of 500 kV Radial Split Transformer

ZHAO Yongjin; XIE Qingfeng; ZHANG Liangxian

doi:10.13296/j.1001-1609.hva.2016.03.022

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Optimization and Analysis on the Key Insulation Structure of 500 kV Radial Split Transformer

更新时间：2025-04-26

- Optimization and Analysis on the Key Insulation Structure of 500 kV Radial Split Transformer
- High VoltageApparatus Vol. 52, Issue 3, Pages: 137-141+146(2016)
- 作者机构：
  
  西安西电变压器有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.03.022
  CLC： TM403
- Published：2016
- 稿件说明：
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[1]赵勇进,谢庆峰,张良县.500kV辐向分裂变压器关键绝缘结构优化分析[J].高压电器,2016,52(03):137-141+146.

ZHAO Yongjin, XIE Qingfeng, ZHANG Liangxian. Optimization and Analysis on the Key Insulation Structure of 500 kV Radial Split Transformer[J]. High voltageapparatus, 2016, 52(3): 137-141+146.
[1]赵勇进,谢庆峰,张良县.500kV辐向分裂变压器关键绝缘结构优化分析[J].高压电器,2016,52(03):137-141+146. DOI： 10.13296/j.1001-1609.hva.2016.03.022.

ZHAO Yongjin, XIE Qingfeng, ZHANG Liangxian. Optimization and Analysis on the Key Insulation Structure of 500 kV Radial Split Transformer[J]. High voltageapparatus, 2016, 52(3): 137-141+146. DOI： 10.13296/j.1001-1609.hva.2016.03.022.

摘要

分裂变压器能够有效地限制低压侧的短路电流

所以发电厂启备变大多采用低压分裂式变压器。为了保证500 kV辐向分裂变压器绝缘结构的可靠性设计

笔者采用有限元方法对该变压器的高压线圈端部绝缘、高压出线装置的电场分布进行计算分析

并对关键部位结构进行优化

将高压线圈上端的静电环改为复合静电环结构

改进了高压出线弹簧压紧装置上边缘棱角屏蔽结构

使得辐向分裂变压器主绝缘结构满足绝缘裕度要求。研究结果可为其运行可靠性分析提供理论依据

并对500 kV以上电压等级分裂变压器的绝缘结构设计提供参考。

Abstract

The split transformer can limit the short circuit current at LV side efficiently

so this LV split type transformer is widely applied to starting-up standby transformer in power station. In order to ensure the reliability of the insulation structure in 500 k V radial split transformer

FEM is used to analyze the electric field distribution of end insulation in HV winding

lead insulation and outlets insulation of HV winding. The insulation structure optimization of key parts in transformer is done. The static ring structure of the high voltage winding is changed to composite insulation structure

and the shielding structure on the edge of the spring-loaded device corners of HV lead insulation is improved. All these measures make the main insulation structure of split transformer meet the margin requirements. The results in this paper can provide a theoretical basis for operational reliability analysis

and provide references for the insulation design of split transformer above 500 k V voltage level.

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