电器与能效管理技术Issue(10)：31-35,5.DOI:10.16628/j.cnki.2095-8188.2024.10.005
一二次融合环网柜内置EVT的内锥套管局部放电分析
Partial Discharge Analysis on Inner Cone Casing of Built-in EVT in Primary and Secondary Fusion Ring Cabinet
摘要
Abstract
In order to solve the partial discharge problem of the EVT inner cone casing in the primary and secondary fusion ring cabinet,the electrostatic field analysis is carried out first to extract the electric field distribution in the area with relatively concentrated electric field.Then according to the high voltage electrode voltage sharing technology and the gas-solid composite insulation theory,the structure of the EVT center copper rod,the shape of the EVT end and the matching clearance with the high pressure end face of the casing are optimized.After optimization,the maximum field strength along the three interfaces of the EVT inner cone casing is reduced from 2.85 kV/mm to 1.75 kV/mm,and the maximum field strength at the end of the casing is reduced from 3.90 kV/mm to 2.35 kV/mm.The feasibility of the method is verified theoretically.The partial discharge test shows that the local discharge quantity is reduced from 42.54 pC to 1.05 pC after optimization,which proves the practical feasibility of the method,and provides a favorable guidance for the research and development of the composite insulation structure related to the quasi-primary and secondary fusion of 10 kV and higher voltage levels.关键词
电子式电压互感器/内锥套管/局部放电/电场分析/绝缘结构Key words
electronic voltage transformer(EVT)/inner cone casing/partial discharge/electric field analysis/insulating structure分类
信息技术与安全科学引用本文复制引用
李燕燕,郑晓果..一二次融合环网柜内置EVT的内锥套管局部放电分析[J].电器与能效管理技术,2024,(10):31-35,5.基金项目
国家电网有限公司科技项目(521997220031) （521997220031）
