高压电器2025，Vol.61Issue(10)：30-38,9.DOI:10.13296/j.1001-1609.hva.2025.10.004
局部放电电压及放电时长对油纸绝缘劣化性能的影响研究
Research on Impact of Partial Discharge Voltage and Duration on Degradation of Oil-paper Insulation
摘要
Abstract
To investigate the impact of partial discharge(PD)on insulation degradation of oil-immersed electrical equipment,a partial discharge testing platform for oil-paper insulation is set up.The impact of PD voltage and dura-tion on the damage of insulation paper,the contents and morphology of free carbon in insulating oil is discussed.The experimental results show that both the PD voltage and duration induce a significant influence on the degradation of insulation paper and the generation of free carbon particles.It is found through visual morphology and image analysis that with the increase of PD voltage and duration,carbonization marks on the insulation paper surface increases,and the damage area expands evidently.When the discharge voltage is increased from 20 kV to 45 kV,the free carbon content is increased by approximately 50.88%after PD process for 120 s,with a notable increase in the size of carbon particles.The long discharge time leads to the increase of both free carbon content and particle size.Especially,at voltage of 45 kV,the discharge time is extended from 30 s to 120 s,and the growth rate of free carbon is upto 61.41%.This study in this paper reveals the relationship of partial discharge and oil-paperin sulationdegradation,providing theoretical support and experimental basis for insulation monitoring and maintenance of oil-immersed electrical equipment.关键词
局部放电/油纸绝缘/放电电压/放电时间/碳颗粒/劣化机制Key words
partial discharge/oil-paper insulation/discharge voltage/discharge duration/carbon particles/degradation mechanism引用本文复制引用
张晓琴,朱洪斌,杨延涛,冯上权,陈宸,赵学童,杨丽君..局部放电电压及放电时长对油纸绝缘劣化性能的影响研究[J].高压电器,2025,61(10):30-38,9.基金项目
国家电网有限公司科技项目(J2024045).Project Supported by Science and Technology Project of State Grid Corporation of China(J2024045). （J2024045）
