高压电器2024，Vol.60Issue(4)：24-32,9.DOI:10.13296/j.1001-1609.hva.2024.04.004
机械应力影响环氧树脂绝缘电树枝劣化研究进展
Research Progress on Influence of Mechanical Stress on Electrical Tree Deterioration of Epoxy Resin Insulation
摘要
Abstract
Epoxy resin is widely used as such insulation parts of electrical equipment as support insulators and insu-lating rods due to its excellent electrical insulation,heat resistance,mechanical properties and good plasticity.With the increase of voltage level of electrical equipment,the operation is becoming more and more critical and the insula-tion failure caused by mechanical stress is becoming more prominent.Based on the reference both at home and abroad,the research progress on insulation breakdown due to electrical tree deterioration of epoxy resin under me-chanical stress is reviewed in this paper.The morphological characteristics of electrical tree growth under tensile and compressive stresses are introduced on the bases of different bearing stresses of epoxy resins,and the influence of mechanical stress on electrical tree growth under temperature conditions is summarized.The mechanism of electrical tree deterioration of insulation materials under mechanical stress is explored based on the physical micro-structure and charge transport characteristics of epoxy resin molecular chains and also from an energy perspective.The key is-sues and solutions for the study of electrical tree branches in epoxy insulation components of electrical equipment is described,which provides a reference for the development of epoxy resin insulation materials with high insulation performance.关键词
环氧树脂/拉伸应力/压缩应力/温度梯度/电树枝/绝缘击穿Key words
epoxy resin/tensile stress/compressive stress/temperature gradient/electrical tree/insulation breakdown引用本文复制引用
张莹,宋慧欣,王冬梅,孔晓晓,杜伯学..机械应力影响环氧树脂绝缘电树枝劣化研究进展[J].高压电器,2024,60(4):24-32,9.基金项目
河北省高等学校科学技术研究项目(QN2023073). Project Supported by Science and Technology Project of Hebei Education Department(QN2023073). （QN2023073）
