高压电器2023，Vol.59Issue(12)：130-137,8.DOI:10.13296/j.1001-1609.hva.2023.12.015
雷电冲击电压下气制变压器油中流注放电发展机理研究
Study on the Streamer-discharge Development Mechanism in Gas-made Transformer Oil Under Lightning Impulse Voltage
摘要
Abstract
For studying the development mechanism of streamer discharge in gas-made transformer oil under light-ning impulse voltage,an impulse voltage discharge experimental platform was established to observe the changes of characteristic parameters related to the streamer propagation caused by the ionization process of the streamer tip and the thermal effect in the gas-made oil at the streamer initial voltage stage to the accelerating voltage stage.The aim is to clarify the streamer tip ionization process and the specific function of thermal effects in all stages of development of the streamer.The results show that in the streamer initiation stage,the physical nature of streamer is a low-density gas channel formed by local gas-liquid changes.While,in the streamer propagation and breakdown stage,the physi-cal nature of the streamer is the photo-ionization process caused by the high field strength of the streamer head.This process leads to the continuous production of the gas-liquid phase interface during the direct ionization process of the liquid.The change of the streamer morphology from a dark channel with a weaker photo-ionization degree to a bright-er channel with a stronger photo-ionization degree is the mechanism behind the sudden change in the streamer propa-gation mode near the accelerating voltage.关键词
流注放电/气制变压器油/击穿电压/光电离Key words
streamer discharge/gas-made transformer oil/breakdown voltage/photo ionization引用本文复制引用
陆怡冰,李峰,周游,卢武,赵文彬..雷电冲击电压下气制变压器油中流注放电发展机理研究[J].高压电器,2023,59(12):130-137,8.基金项目
国家自然科学基金项目(51707113).Project Supported by National Natural Science Foundation of China(51707113). （51707113）
