基于两间隙异步联动的一体化高压真空灭弧室电场设计  

Electric Field Design of Integrated High-Voltage Vacuum Interrupter Based on Two-Gap Asynchronous Linkage

作　　者：葛国伟 王文博[1] 程显[1] 陈辉[1] 段晓辉 Ge Guowei;Wang Wenbo;Cheng Xian;Chen Hui;Duan Xiaohui(School of Electrical and Information Engineering Zhengzhou University,Zhengzhou 450001 China;Pinggao Group Co.Ltd,Pingdingshan 467001 China)

机构地区：[1]郑州大学电气与信息工程学院,郑州450001 [2]平高集团有限公司,平顶山467001

出　　处：《电工技术学报》2024年第17期5555-5564,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51977195,52107170);河南省优秀青年科学基金(202300410370);河南省科技创新人才(21HASTIT022)资助项目。

摘　　要：输电等级真空灭弧室是迫切需要解决的行业级难题,为克服单断口真空灭弧室绝缘瓶颈和多断口串联结构复杂等问题,该文提出了一种基于两间隙异步联动的一体化高压真空灭弧室结构,该结构采用辅间隙与主间隙串联异步联动,辅间隙协助主间隙绝缘和灭弧,有望实现252kV及以上电压等级真空灭弧室的工程应用。建立了两间隙异步联动的一体化高压真空灭弧室电场仿真模型,分析了进出线方向、主辅间隙、屏蔽罩等对电场强度和电压分布关系的影响规律,并研究了屏蔽罩结构和环形陶瓷分压电容器等分压措施对电场提升的效果。研究表明:静端盖为出线端、动端盖为进线端时,主间隙开距为60 mm、辅助间隙开距为30 mm可以满足分压关系按照开距大小分布,最大电场强度相比于长间隙开距60 mm时降低27.3%。外部并联环形陶瓷分压电容器可以满足双向分断的要求,进线端在静端盖时外部并联环形陶瓷分压电容器灭弧室相较于未并联电容的灭弧室最大电场强度降低30%左右,初步说明了基于两间隙异步联动的一体化高压真空灭弧室结构的可行性和有效性,研究可为高电压等级真空灭弧室研制提供新思路和新方法。The vacuum interrupter of transmission grade is an urgent industry-level problem to be solved.In order to overcome the insulation bottleneck of single-break vacuum interrupter and the complex structure of multi-break series,this paper innovatively proposes an integrated high-voltage vacuum interrupter structure based on two-gap asynchronous linkage.The structure adopts the asynchronous linkage of the auxiliary gap and the main gap in series,and the auxiliary gap assists the main gap insulation and arc extinguishing,and controls the opening speed of the two gaps through the intermediate self-driving mechanism,so that the main and auxiliary gaps can be opened according to the preset requirements.This structure uses an operating mechanism structure more simple than the multi-break series technology.Its size is similar to that of single-break vacuum interrupter,and it can also improve the insulation degree of single-break vacuum interrupter while being smaller than the size of multi-break series connection.It is expected to realize the engineering application of vacuum interrupter with voltage level of 252 kV and above.In this paper,the electric field simulation model of the integrated high-voltage vacuum interrupter with two-gap asynchronous linkage is established.The electric field simulation of the model is carried out by COMSOL software.The influence of the opening distance of the main and auxiliary gaps and the structure of the shielding cover on the relationship between the electric field intensity and the voltage distribution is obtained.In addition,according to the equivalent capacitance obtained by simulation,the influence of the direction of the inlet and outlet lines on the voltage distribution is analyzed in principle.Aiming at the problem of different voltage division between main and auxiliary gaps caused by different directions of inlet and outlet lines,voltage division measures such as shielding cover structure and annular ceramic grading capacitor are proposed,and the effects of these two measures on

关 键 词：两间隙真空灭弧室 单断口真空断路器 均压措施 异步联动 

分 类 号：TM561.2[电气工程—电器]