高压电器2023，Vol.59Issue(12)：176-184,9.DOI:10.13296/j.1001-1609.hva.2023.12.021
重复脉冲电压下油纸的局部放电损伤对其电气性能影响的实验研究
Experimental Study on Influence of Oil-immersed Paper Damage Caused by Partial Discharge on Its Electrical Performance Under Repetitive Pulse Voltage
摘要
Abstract
This study investigates the influence of oil-immersed paper damage caused by partial discharge on its electrical performance under repetitive pulse voltage.Material analysis and electrical measurement measures are used respectively to analyze such damage characteristics of oil-immersed paper as morphologies,products and micro structures during pulse voltage discharge.The electrical performance such as conductivity,polarization,loss and breakdown has also been studied.The influence of micro structure of oil-immersed paper and its product on its elec-trical performance before and after cleaning is compared and analyzed.The results show that under repetitive pulse voltage,damage products caused by partial discharge of oil-immersed paper are mainly aldehydes or carboxylic ac-ids,damage products are distributed radially on insulation surface and guide development trend of electric tree.The transient impulse voltage stress generated due to the edge mutation(du/dt→0)of pulse voltage intensifies formation of cellulose molecular fragments,and the long-delay flat-top region of pulse voltage provides sufficient time for recrys-tallization of molecular fragments.Micro structure variation and discharge product generation have opposite effects on electrical performance of oil-immersed paper,but discharge product is the dominant factor to determine electrical properties.关键词
脉冲电压/油纸绝缘/局部放电/损伤特性/电气性能Key words
pulse voltage/oil-immersed paper insulation/partial discharge/damage characteristics/electrical performance引用本文复制引用
严家明,周一恒,陈奎,董海波..重复脉冲电压下油纸的局部放电损伤对其电气性能影响的实验研究[J].高压电器,2023,59(12):176-184,9.基金项目
国家重点研发计划项目(2017YFF0210600) （2017YFF0210600）
国网江苏省电力公司科技项目(SGJSXZ00KJJS2101268).Project Supported by the National Key Research and Development Program of China(2017YFF0210600),Science and Technology Project of State Grid Jiangsu Electric Power Company(SGJSXZ00KJJS2101268). （SGJSXZ00KJJS2101268）
