Abstract：The trigger failure problem of gas gap switch triggered by plasma jet is serious under the cumulative trigger effect. In order to realize the long life and high stability conduction of gas gap switch, triggering failure analysis and life enhancement experiments have been carried out based on the gas switch trigger life research platform. Firstly, The degradation process of gas gap switch contact performance under cumulative triggering discharge was studied, and the reasons for its triggering failure was analyzed. On this basis, the trigger life enhancement study was carried out for the reasons of trigger failure. The impact characteristics of pulse voltage, energy storage voltage, and triggering cavity gas generation material on the improvement of gas gap switch lifespan were discussed separately. The results are as follows: (1) Under the action of high-voltage pulses and arc currents, the primary and secondary trigger cavities are both subjected to varying degrees of degradation. The ablation products that is continuous accumulation in the first stage cavity absorbs high-voltage pulse energy, and reduces the discharge efficiency and energy density. On the other hand, it obstructs the diffusion and propagation of plasma, affecting the jet stability. The combined effect of the two leads to a decrease in the ability of the primary cavity to form a pre-ionization channel. After the cracks occur in the secondary cavity, the integrity and continuity of its surface are damaged, influencing the focusing and transmitting of arc energy. The plasma jet may diffuse along the crack path, causing unstable jetting and sputtering conditions. The continuous expansion in nozzle diameter further delays the internal energy accumulation process of the plasma, resulting in a significant decrease in jet performance. The deterioration of the trigger cavity performance is the main reason for the trigger failure of the gas gap switch. (2) Increasing the charging voltage of pulse capacitors can effectively reduce discharge delay jitter, but it does not significantly improve the triggering life. By increasing the charging voltage of the energy-storage capacitor, the triggering life and contact stability can be significantly improved. Increasing the injection energy can significantly improve the plasma injection performance and shorten the breakdown time delay. However, the failure of the trigger cavity caused by multiple and large energy injection in the initial triggering stage is also serious, resulting in a shortened lifespan. Therefore, the critical trigger voltage can be applied at the initial stage of triggering to reduce the over-energy ablation, and then the triggering life can be significantly improved by stepped voltage application. As the number of triggering increases, the contact performance of gas switches under different gas producing materials decreases. In addition, after filling with inorganic materials in polytetrafluoroethylene (PTFE), the conductivity and energy deposition rate of the triggering cavity are significantly improved. After doping 0.5% Cu powder with PTFE, the thermal conductivity and conductivity of the discharge channel are improved, and the performance of the jet plasma is significantly improved. But it exacerbates the ablation degradation of the trigger cavity. After doping with 0.2% MoS2, the anti-arc ablation ability of the trigger cavity is enhanced, but the plasma injecting performance is poor. The triggering lifetime is manifested as PTFE>PTFE+0.2% MoS2>PTFE+0.5% Cu powder.
董冰冰, 孟岩, 郭志远. 气体间隙开关触发失效分析及寿命提升方法[J]. 电工技术学报, 2025, 40(1): 264-272.
Dong Bingbing, Meng Yan, Guo Zhiyuan. Trigger Failure Analysis and Life Extension Methods of Gas Gap Switch. Transactions of China Electrotechnical Society, 2025, 40(1): 264-272.
[1] 周孝信, 鲁宗相, 刘应梅, 等. 中国未来电网的发展模式和关键技术[J]. 中国电机工程学报, 2014, 34(29): 4999-5008. Zhou Xiaoxin, Lu Zongxiang, Liu Yingmei, et al.Development models and key technologies of future grid in China[J]. Proceedings of the CSEE, 2014, 34(29): 4999-5008. [2] 雷顺广, 束洪春, 李志民. 基于桥臂功率特征的全-半混合型柔性直流输电线路保护[J]. 电工技术学报, 2023, 38(13): 3563-3575. Lei Shunguang, Shu Hongchun, Li Zhimin.Full-half bridge hybrid VSC-HVDC transmission line protection method based on power characteristics of bridge arms[J]. Transactions of China Electrotechnical Society, 2023, 38(13): 3563-3575. [3] 吴康, 任丽霜, 李大伟. 柔性直流输电技术的现状与展望[J]. 电工技术, 2023(13): 115-119. Wu Kang, Ren Lishuang, Li Dawei.Current status and prospect of VSC-HVDC transmission technology[J]. Electric Engineering, 2023(13): 115-119. [4] 郭贤珊, 周杨, 梅念, 等. 张北柔直电网的构建与特性分析[J]. 电网技术, 2018, 42(11): 3698-3707. Guo Xianshan, Zhou Yang, Mei Nian, et al.Construction and characteristic analysis of Zhangbei flexible DC grid[J]. Power System Technology, 2018, 42(11): 3698-3707. [5] 杜晓磊, 蔡巍, 张静岚, 等. 柔直电网孤岛运行方式下换流阀闭锁时交流耗能装置投切仿真研究[J]. 全球能源互联网, 2019, 2(2): 179-185. Du Xiaolei, Cai Wei, Zhang Jinglan, et al.Simulation study on switching on energy dissipation device during unipolar blocking under isolated island operation in VSC-HVDC power grid[J]. Journal of Global Energy Interconnection, 2019, 2(2): 179-185. [6] 束洪春, 代月, 安娜, 等. 基于线性回归的柔性直流电网纵联保护方法[J]. 电工技术学报, 2022, 37(13): 3213-3226, 3288. Shu Hongchun, Dai Yue, An Na, et al.Pilot protection method of flexible DC grid based on linear regression[J]. Transactions of China Electrotechnical Society, 2022, 37(13): 3213-3226, 3288. [7] Taherzadeh E, Radmanesh H, Javadi S, et al.Circuit breakers in HVDC systems: state-of-the-art review and future trends[J]. Protection and Control of Modern Power Systems, 2023, 8(1): 38. [8] 辛业春, 孙浩然, 王威儒, 等. 混合式高压直流断路器开断过程整机应力特性研究[J]. 高压电器, 2023, 59(6): 40-47. Xin Yechun, Sun Haoran, Wang Weiru, et al.Research on stress characteristics of hybrid HVDC circuit breaker during breaking process[J]. High Voltage Apparatus, 2023, 59(6): 40-47. [9] 李浩, 裴翔羽, 李泽文, 等. 具备故障电流限制能力的多端口直流断路器[J]. 电工技术学报, 2023, 38(10): 2818-2831. Li Hao, Pei Xiangyu, Li Zewen, et al.A multi-port DC circuit breaker with fault-current limiting capability[J]. Transactions of China Electrotechnical Society, 2023, 38(10): 2818-2831. [10] 董冰冰, 陶磊, 李志兵, 等. 机械式直流断路器换流支路用气体间隙开关方案及其诱导击穿特性[J]. 高电压技术, 2022, 48(12): 4863-4872. Dong Bingbing, Tao Lei, Li Zhibing, et al.A gas gap switch scheme for commutation branch of DC circuit breakers and its induced breakdown characteristics[J]. High Voltage Engineering, 2022, 48(12): 4863-4872. [11] 程显, 王振伟, 吕彦鹏, 等. 基于多孔隙触发的三电极场畸变开关设计与实验研究[J]. 电工技术学报, 2023, 38(24): 6807-6816. Cheng Xian, Wang Zhenwei, Lü Yanpeng, et al.Design and experiment study of three electrode field distortion switch based on multi-hole trigger[J]. Transactions of China Electrotechnical Society, 2023, 38(24): 6807-6816. [12] 宋心哲, 廖敏夫, 卢刚, 等. 三间隙激光触发真空开关触发特性研究[J]. 电工技术学报, 2023, 38(14): 3923-3929. Song Xinzhe, Liao Minfu, Lu Gang, et al.Research on triggering characteristics of triple-gap laser triggered vacuum switch[J]. Transactions of China Electrotechnical Society, 2023, 38(14): 3923-3929. [13] Dong Bingbing, Zhang Zelin, Xiang Nianwen, et al.Study on triggering characteristics and induced breakdown rules of SF6 gap switch plasma jets at extremely low working voltage[J]. IEEE Transactions on Plasma Science, 2022, 50(4): 873-882. [14] Huang Dong, Yang Lanjun, Guo Haishan, et al.Characteristics and dispersity of a two gap capillary discharge applied for long spark gap ignition in air[J]. Physics of Plasmas, 2017, 24(7): 073501. [15] 铁维昊, 刘善红, 张乔根, 等. 新型等离子体喷射触发气体开关[J]. 强激光与粒子束, 2014, 26(4): 120-124. Tie Weihao, Liu Shanhong, Zhang Qiaogen, et al.A novel plasma-jet triggered gas switch[J]. High Power Laser and Particle Beams, 2014, 26(4): 120-124. [16] Dong Bingbing, Guo Zhiyuan, Xiang Nianwen.Effect of working coefficient on induced breakdown characteristics of plasma-triggered-based gas gap switch in fast bypass conditions[J]. IEEE Transactions on Plasma Science, 2023, 51(1): 148-155. [17] 董冰冰, 张泽霖, 李志兵, 等. 极低工作系数下SF6间隙开关喷射等离子体诱导击穿作用规律[J]. 高电压技术, 2022, 48(1): 348-357. Dong Bingbing, Zhang Zelin, Li Zhibing, et al.Induced breakdown law of plasma jet-triggered SF6 gap switch at very low operating coefficient[J]. High Voltage Engineering, 2022, 48(1): 348-357. [18] 郜淦, 李晓昂, 张宁博, 等. 增强型等离子体喷射装置及其触发极限[J]. 高电压技术, 2022, 48(8): 3334-3343. Gao Gan, Li Xiaoang, Zhang Ningbo, et al.Enhanced plasma ejector and its trigger limit[J]. High Voltage Engineering, 2022, 48(8): 3334-3343. [19] Dong Bingbing, Guo Zhiyuan, Zhang Zelin, et al.Numerical simulation and experimental verification of plasma jet development in gas gap switch[J]. Plasma Science and Technology, 2023, 25(5): 055505. [20] Huang Dong, Yang Lanjun, Huo Peng, et al.Study on the characteristics of a two gap capillary discharge[J]. Physics of Plasmas, 2015, 22(2): 023509. [21] 董冰冰, 郭志远, 文韬, 等. 两级沿面触发型气体开关等离子体喷射过程与触发导通规律[J]. 高电压技术, 2022, 48(11): 4656-4666. Dong Bingbing, Guo Zhiyuan, Wen Tao, et al.Development process of jet plasma of two-stage surface-triggered gas switch and its trigger conduction law[J]. High Voltage Engineering, 2022, 48(11): 4656-4666. [22] 吴佳玮, 丁卫东, 韩若愚, 等. 大电流条件下气体火花开关电极烧蚀的研究进展[J]. 高电压技术, 2021, 47(9): 3367-3379. Wu Jiawei, Ding Weidong, Han Ruoyu, et al.Review of electrode erosion in a spark gap switch under large pulsed currents[J]. High Voltage Engineering, 2021, 47(9): 3367-3379. [23] 罗城, 丛培天, 张天洋, 等. 气体火花开关电极烧蚀研究综述[J]. 强激光与粒子束, 2020, 32(10): 131-139. Luo Cheng, Cong Peitian, Zhang Tianyang, et al.Review of the research on electrode erosion of gas spark switch[J]. High Power Laser and Particle Beams, 2020, 32(10): 131-139. [24] 董冰冰, 郭志远. 气体间隙开关喷射等离子体触发性能劣化及剩余触发寿命预测研究[J]. 电工技术学报, 2024, 39(5): 1497-1509. Dong Bingbing, Guo Zhiyuan.Study on triggering performance degradation and remaining trigger life prediction of gas gap switch jet plasma[J]. Transactions of China Electrotechnical Society, 2024, 39(5): 1497-1509. [25] Dong Bingbing, Guo Zhiyuan, Zhang Zelin.Action law and deterioration characteristics of trigger cavity of plasma-jet-triggered air-gap switch[J]. IEEE Transactions on Plasma Science, 2022, 50(11): 4693-4699. [26] 朱浩, 李志兵, 李晓昂, 等. 等离子体喷射触发型SF6间隙开关触发寿命试验研究[J]. 电网技术, 2021, 45(8): 3298-3304. Zhu Hao, Li Zhibing, Li Xiaoang, et al.Experimental study on trigger life of SF6 gap switch triggered by plasma jet[J]. Power System Technology, 2021, 45(8): 3298-3304.
2025, Vol. 40 
