大容量密封触发真空间隙设计与试验  

Design and Test of Seal Triggering Vacuum Gap with Large Current Capacity

作　　者：颜湘莲 李志兵 田阳 刘北阳 戴玲[2] 徐晓东 YAN Xianglian;LI Zhibing;TIAN Yang;LIU Beiyang;DAI Ling;XU Xiaodong(China Electric Power Research Institute, Beijing 100192, China;School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《高电压技术》2017年第12期3876-3883,共8页High Voltage Engineering

摘　　要：为了适应电力系统快速闭合的需求,有必要开展大容量密封触发间隙关键技术研究及样机设计,为此对应用于35 k V及以下电压等级的触发真空间隙(TVG)进行了设计研发。分析了TVG触发导通产生的真空电弧特性,及工作电压、触发时延和通流能力等性能,选用了多棒极TVG结构;设计了TVG触发极,确定了间隙触发方式及回路,对TVG进行双极性触发控制确保其在交流电压下可靠触发;对TVG触发导通产生的电弧受到的电磁力进行了仿真计算,并开展了电弧运动观测试验,以此设计优化了TVG主电极。利用多棒极TVG关键技术研究成果,研制了12 k V和40.5 k V TVG样机,提出了产品的技术参数,开展了样机的触发、通流及绝缘恢复性能试验,结果表明12 k V样机的触发电压为0.5 k V,40.5 k V样机的触发电压为5 k V,触发时延<200μs,性能均满足技术要求。To meet the requirements of the fast closing of power system, it is necessary to investigate the key technology of seal triggering gap and design its prototype. Consequently, we developed and designed the triggering vacuum gap （TVG） applied in the voltage grade under 35 kV. The characteristics of vacuum arc generated by TVG conduction were analyzed, including the working voltage, triggering delay, and current capability. The structure of multi-rods electrode was selected for TVG. The triggering electrode of TVG was designed, and the triggering modes and circuits were determined. TVG was bipolarly triggered and controlled to ensure its reliable triggering under AC voltage. Moreover, the electromagnetic forces of arcs generated by TVG conduction were calculated. And the arc movement was tested and observed, then the main electrodes of TVG were optimized. Based on the achievements from the key technology of TVG, the prototypes of 12 kV and 40.5 kV TVG were developed. The technical parameters were provided for products. The triggering performance, current, and insulation recovery ability of prototypes were experimentally investigated. The triggering voltage of 12 kV prototype is 0.5 kV, and that of 40.5 kV prototype is 5 kV. The triggering delay of two prototypes is less than 200 μs. The test results reveal that the performances of two prototypes both meet the requirements of the technical specifications.

关 键 词：触发真空间隙 多棒极 触发极 通流能力 双极性触发 

分 类 号：TM502[电气工程—电器]