基于局部放电影响的变压器套管优化研究
Optimization of Transformer Bushing Based on Partial Discharge
代彬1
作者信息
- 1. 国网衡水供电公司,河北衡水 053000
- 折叠
摘要
随电压等级升高,油纸电容式套管故障日益常见,其中局部放电为主要故障诱因.为保障电网稳定与安全运行,需对套管的局部放电进行有力管控.为此,研究构建了一个油纸电容型的套管结构,并采用数值模拟工具对126 kV套管进行电热联合模拟,目标是了解工作条件对主隔离材料的微小电放效果.结果显示,主隔离材料的热度在轴向上呈现一个先增后减的趋势,径向持续降低,零屏位置出现最高温度89℃,最低温度72℃.综上所述,该研究提高了主隔离材料微放的触发电压,这对于理解和改善油纸电容式套管在增强电网稳定和安全方面具有显著的实际意义.
Abstract
With the increase of voltage level,oil-paper capacitor casing faults are becoming more and more common,of which partial discharge is the main cause of faults.In order to ensure the stability and safe operation of the power grid,it is necessary to control the partial discharge of the casing.To this end,the study constructs an oil-paper capacitor-type casing structure,and uses numerical simulation tools to conduct electro-thermal joint simulation of 126 kV casing,with the goal of understanding the effect of operating conditions on the main isolation material's tiny electrical discharge.The results show that the heat of the main isolation material shows an increasing and then decreasing trend in the axial direction,with a continuous decrease in the radial direction,with a maximum temperature of 89°C and a minimum temperature of 72°C occurring at the zero screen position.In summary,this study improves the trigger voltage of the micro-discharge of the main isolation material,which is of significant practical significance in understanding and improving the oil-paper capacitive casing in enhancing the stability and safety of the power grid.
关键词
主隔离/变压器/油纸电容式套管/有限元分析Key words
primary isolation/transformer/oil-paper capacitive bushing/finite element analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据