李国强,卞荣,陈科技,张琳琳,顾妙松,成智,王超
LI Guoqiang,BIAN Rong,CHEN Keji,ZHANG Linlin,GU Miaosong,CHENG Zhi,WANG Chao

• 1:国网浙江省电力有限公司经济技术研究院
• 2:安徽工业大学电气与信息工程学院

摘要(Abstract)：

为研究低频输电下GIS（气体绝缘金属封闭开关设备）中单相盆式绝缘子的沿面闪络特性，采用电-热-流体多物理场耦合仿真，考虑因集肤效应引起的温升变化以及材料性能参数的温度依赖特性，计算得到不同工作频率下盆式绝缘子的电磁损耗、温升特性与沿面电场分布。基于时间-体积理论，综合考虑温度对气固界面电场分布以及有效载流子产生速率的影响，计算得到不同电压幅值和频率下盆式绝缘子的沿面闪络概率。仿真结果表明：低频输电方式能够有效缓解电磁损耗，降低GIS罐体内的最高温度，在相同绝缘结构配置下具有更高的沿面闪络电压。研究成果可为校核不同工作频率下气体绝缘高压电气设备的绝缘水平提供理论依据。
To study the surface flashover characteristics of single-phase basin-type insulators in gas insulated metalenclosed switchgear(GIS) under low-frequency transmission, an electro-thermal-fluid coupling simulation is employed. Considering the temperature rise due to the skin effect and the temperature-dependent properties of material parameters, this approach calculates the electromagnetic loss, temperature rise characteristics, and surface electric field distribution of the basin-type insulator at different operating frequencies. Based on the time volume theory, the paper comprehensively considers the impact of temperature on the electric field distribution at the gas-solid interface and the generation rate of effective carrier to determine the surface flashover probability of the basin-type insulator at various voltage amplitudes and frequencies. The simulation results indicate that low-frequency transmission can effectively mitigate electromagnetic losses and reduce the maximum temperature inside the GIS enclosure. Furthermore, it offers higher surface flashover voltage for the same insulation configuration. This study provides theoretical support for verifying the insulation levels of gas-insulated high-voltage electrical equipment at different operating frequencies.

关键词(KeyWords)： 低频输电;盆式绝缘子;沿面闪络;多物理场耦合;闪络电压预测
low-frequency transmission;basin-type insulator;surface flashover;multiphysics coupling;flashover voltage prediction

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司经济技术研究院科技项目（SGYHT/23-JS-004）;; 国家自然科学基金资助项目（52407156,52207147）

作者(Author): 李国强,卞荣,陈科技,张琳琳,顾妙松,成智,王超
LI Guoqiang,BIAN Rong,CHEN Keji,ZHANG Linlin,GU Miaosong,CHENG Zhi,WANG Chao

DOI: 10.19585/j.zjdl.202409010

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