高电压技术2025，Vol.51Issue(6)：2620-2630,11.DOI:10.13336/j.1003-6520.hve.20241857
环保型罐式多断口真空断路器气体绝缘与沿面闪络特性
Gas Insulation and Surface Flashover Characteristics of Environment-friendly Tank Multi-break Vacuum Circuit Breakers
摘要
Abstract
With the proposal of carbon peak and carbon neutrality target,the tank multi-break vacuum circuit breakers technology,which adopts natural gas insulation and vacuum interrupter for breaking technology,is an effective alternative to replace SF6 circuit breakers in the field of high voltage and ultra-high voltage;however,it is not clear to realize the se-lection of insulating gas and to understand the surface flashover mechanism of the vacuum interrupter ceramic shell.Firstly,the natural eco-friendly insulating gas dry air and CO2 lightning impulse breakdown tests were conducted,an en-vironmentally friendly insulating gas scheme was proposed.On this basis,the surface flashover test of the vacuum interrupter ceramic shell was performed,and the gas-solid surface flashover mechanism was analyzed.The results show that 0.9 MPa dry air and 0.9 MPa CO2 can meet the requirements of the insulation configuration of environment-friendly vacuum circuit breakers.The surface flashover voltage increases with the increase of gas pressure and shows a slightly saturated trend,the surface flashover voltage of the vacuum interrupter by 0.9 MPa dry air reaches 202.98 kV,and the in-troduction of the center seal ring decreases the surface flashover voltage by 8.47％.When the length of metal particles is 5 mm and the distance from the high-voltage end is 5 mm,the surface flashover voltage amplitude of the ceramic shell is reduced to a relative maximum of 49.67 kV.The introduction of the center seal ring increases the surface charge density herein from 6.62 μC/m2 to 21.54 μC/m2,leading to a decrease in its surface flashover voltage.The above results can pro-vide theoretical basis and experimental supports for the development of environmentally friendly tank vacuum circuit breakers in the ultra-high voltage field.关键词
环保型绝缘气体/罐式断路器/雷电冲击电压/真空灭弧室/沿面闪络Key words
environment-friendly insulating gas/tank circuit breakers/lightning impulse voltage/vacuum interrupter/surface flashover引用本文复制引用
程显,郭龙雨,杜帅,葛国伟,鲁文龙..环保型罐式多断口真空断路器气体绝缘与沿面闪络特性[J].高电压技术,2025,51(6):2620-2630,11.基金项目
国家高层次人才特殊支持计划(SQ2022QB06966) （SQ2022QB06966）
国家自然科学基金(52107170 （）
52477163).Project supported by National Special Support Program for High-level Talents(SQ2022QB06966),National Natural Science Foundation of China(52107170,52477163). （SQ2022QB06966）
