Abstract To research the characteristics of AC and DC discharges under low pressure condition, this paper carried out laboratory investigations of AC and DC dischargesby self-manufactured test chamber for 200-600mm rod-plane gaps within 0.5-60kPa. The relationship between discharge voltage Uand pressure P of different voltage modes are obtained, and the characteristics of U-Pcurves as well as their reasons are analyzed. The results show that, the U-P curves of AC, positive DC and negative DC discharges have significant differences. Within 2-4 kPa under DC voltage, a reversal of polarity effect occurred, and the magnitude of discharge voltage under positive and negative DC voltage changed from UDC(-)<UDC(+) to UDC(+)<UDC(-) with the increase of pressure value. The ionized layer formed on the surface of plane electrode when P≤2 kPa is the cause of the reversion of polarity effect. The U-P curves of AC discharge has saturation region due to the continuous partial streamer discharges within specific pressure range. These results have reference value for the study of long gap discharge underlow pressure.
Yang Yaqi,LiWeiguo,Xia Yu Yuan等. Research of AC and DC Discharge Characteristics of Long Gap under Low Pressure[J]. Transactions of China Electrotechnical Society, 2018, 33(5): 1143-1150.
[1] 孙才新, 蒋兴良, 司马文霞, 等. 海拔4000m以上短间隙交流放电特性及电压校正[J]. 中国电机工程学报, 2002, 22(10): 116-120. Sun Caixin, Jiang Xingliang, SimaWenxia, et al.AC discharge performance and voltage correction of short air gaps in 4000m and above altitude districts[J]. Proceedings of the CSEE, 2002, 22(10): 116-120. [2] 郝艳捧, 毛长庚, 王国利, 等. 高海拔地区复合绝缘子先导发展法闪络判据[J]. 中国电机工程学报, 2012, 32(34): 158-164. HaoYanbang, Mao Changgeng, Wang Guoli, et al. Flashover criterion based on the leader propagation model of composite insulators in high-altitude areas[J]. Proceedings of the CSEE, 2012, 32(34): 158-164. [3] 律方成, 秦春旭, 郭文义, 等. 高海拔地区±800 kV特高压直流输电系统绝缘子带电自然积污特性[J]. 高电压技术, 2013, 39(3): 513-519. LüFangcheng, Qin Chunxu, GuoWenyi, et al. Natural contamination deposited characteristics of ±800 kV UHV DC insulators at high altitudes[J]. High Voltage Engineering, 2013, 39(3): 513-519. [4] 杨庆, 董岳, 叶轩, 等. 高海拔地区500kV输电线路用复合绝缘子与并联间隙的绝缘配合[J]. 高电压技术, 2013, 39(2): 407-414. Yang Qing, Dong Yue, YeXuan, et al. Insulating coordination between composite insulator and parallel gap device of 500 kV transmission line at high altitude area[J]. High Voltage Engineering, 2013, 39(2): 407-414. [5] 王磊, 苏杰, 谷山强, 等. 高海拔长绝缘子串并联间隙雷电冲击放电特性及其失效性[J]. 高电压技术, 2014, 40(5): 1365-1373. Wang Lei, SuJie, GuShanqiang, et al. Lightning impulse discharge characteristics and invalidation of long insulator strings with parallel gap at high altitude area[J]. High Voltage Engineering, 2014, 40(5): 1365-1373. [6] Gollor M, Rogalla K.HV design of vacuum insulated power supplies for space applications[J]. IEEE Transactions on Electrical Insulation, 1993, 28(4): 667-680. [7] Komatsubara M, Ishii M, Tsumura E.Research on outgas and light emission from electrostatic discharge on polymer films in vacuum[J]. Transactions-institute of Electrical Engineering of Japan A, 1994, 144(7): 528-534. [8] 刘浩, 刘尚和, 魏明, 等. 高空低气压电晕放电特性模拟实验研究[J]. 高电压技术, 2015, 41(5): 1704-1708. Liu Hao, Liu Shanghe, Wei Ming, et al.Research of corona discharge characteristics for low pressure high altitude based on simulation experiments[J]. High Voltage Engineering, 2015, 41(5): 1704-1708. [9] 刘浩, 刘尚合, 曹鹤飞, 等. 高空低气压、低温环境下的电晕放电模拟试验系统[J]. 高电压技术, 2015, 41(2): 578-583. Liu Hao, Liu Shanghe, Cao Hefei, et al.Experimental simulation system of corona discharges under high-altitude, low-pressure and low-temperature conditions[J]. High Voltage Engineering, 2015, 41(2): 578-583. [10] 司马文霞, 叶轩, 谭威, 等. 高海拔220kV输电线路绝缘子串与并联间隙雷电冲击绝缘配合研究[J]. 中国电机工程学报, 2012, 32(10): 168-176. SimaWenxia, Ye Xuan, Tan Wei, et al. Lightning insulating co-ordination between insulator string and parallel gap device of 220kV transmission line at high altitude area[J]. Proceedings of the CSEE, 2012, 32(10): 168-176. [11] 廖永力, 李瑞海, 李小建, 等. 典型空气间隙放电电压修正的试验研究[J]. 中国电机工程学报, 2012, 32(28): 171-176. Liao Yongli, Li Ruihai, Li Xiaojian, et al.Experimental research on typical air gap test voltage correction[J]. Proceedings of the CSEE, 2012, 32(28): 171-176. [12] 王羽, 李志军, 戴敏, 等. 长空气间隙负极性操作冲击放电特性研究(Ⅰ)-试验研究[J]. 中国电机工程学报, 2014, 34(21): 3534-3540. Wang Yu, Li Zhijun, Dai Min, et al.Research on typical long air gaps with negative switching impulses(I)-experiments[J]. Proceedings of the CSEE, 2014, 34(21): 3534-3540. [13] 丁玉剑, 李庆峰, 廖蔚明, 等. 高海拔地区典型长空气间隙的操作冲击放电特性和海拔校正[J]. 高电压技术, 2013, 39(6): 1441-1446. Ding Yujian, Li Qingfeng, Liao Weiming, et al.Switching impulse discharge characteristics and altitude corrections for typical long air gaps at high altitude areas[J]. High Voltage Engineering, 2013, 39(6): 1441-1446. [14] 蒋兴良, 于亮, 苑吉河, 等. 低气压棒-板间隙操作冲击放电特性及电压校正[J]. 高电压技术, 2007, 33(11): 70-74. Jiang Xingliang, YuLiang, Yuan Jihe, et al. Switching impulse discharge performance and voltage correction of rod-plane air gaps at low atmospheric pressure[J]. High Voltage Engineering, 2007, 33(11): 70-74. [15] 蒋兴良, 于亮, 胡建林, 等. 棒-板长空气间隙在低气压下雷电冲击特性及电压校正[J]. 中国电机工程学报, 2005, 25(11): 152-156. Jiang Xingliang, Yu Liang, Hu Jianlin, et al.Lightning Impulse discharge performance and voltage correction of long air gaps at lower atmospheric pressure[J]. Proceedings of the CSEE, 2005, 25(11): 152-156. [16] 蒋兴良, 赵智亮, 孙才新, 等. 低气压正棒-板短间隙操作冲击放电特性[J]. 高电压技术, 2002, 28(7): 7-9. Jiang Xingliang, Zhao Zhiliang, Sun Caixin, et al.Switching impulse discharge performance and voltage correction for positive rod-plane short air gaps in low air-pressure[J]. High Voltage Engineering, 2002, 28(7): 7-9. [17] 孟晓波, 惠建峰, 卞星明, 等. 低气压下流注放电特性的研究[J]. 中国电机工程学报, 2011, 31(25): 139-149. Meng Xiaobo, Hui Jianfeng, BianXingming, et al. Research on the characteristic of streamer discharge at low air pressure[J]. Proceedings of the CSEE, 2011, 31(25): 139-149. [18] 李敏, 汪沨, 许松枝, 等. 基于分形理论的SF6/N2混合气体放电仿真[J]. 电工技术学报, 2016, 31(24): 88-95. Li Min, Wang Feng, Xu Songzhi, et al.Simulation discharge on SF6/N2 gas mixtures based on fractal theory[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 88-95. [19] 汪沨, 李锰, 潘雄峰, 等. 基于FEM-FCT算法的SF6/N2混合气体中棒-板间隙电晕放电特性的仿真研究[J]. 电工技术学报, 2013, 28(9): 261-267. Wang Feng, Li Meng, Pan Xiongfeng, et al.Corona discharge simulation of rod-plate gap in SF6/N2 gas mixtures using FEM-FCtmethod[J]. Transactions of China Electrotechnical Society, 2013, 28(9): 261-267. [20] 汪沨, 李敏, 李锰, 等. 基于ETG-通量校正传输法的短间隙SF6/N2混合气体流注放电数值仿真研究[J]. 电工技术学报, 2016, 31(6): 232-241. Wang Feng, Li Min, Li Meng, et al.Numerical simulation of short gap streamer discharge in SF6/N2 gas mixtures based on Eur-Taylor-Galerkin-Flux corrected transport method[J]. Transactions of China Electrotechnical Society, 2016, 31(6): 232-241. [21] Nakano Y, Kojima H, Hayakawa N, et al.Pre-discharge and flashover characteristics of impulse surface discharge in vacuum[J]. IEEE Transactions onDielectrics & Electrical Insulation, 2014, 21(1): 403-410. [22] Nakano Y, Kojima H, Hayakawa N, et al.Development process of impulse surface discharge in vacuum[C]//25thInternational Symposium on Discharges and Electrical Insulation in Vacuum, Tomsk, Russia, 2012: 125-128. [23] Kojima H, Ishida M, Hayakawa N, et al.Partial discharge characteristics and mechanisms in consideration of charge behavior on alumina dielectrics under AC voltage in vacuum[C]//2ndInternational Conference on Electric Power Equipment, Matsue, Japan, 2013: 1-4. [24] Kojima H, Ishida M, Hayakawa N, et al.Charge behavior and partial discharge characteristics on alumina dielectrics under AC voltage application in vacuum[C]//25thInternational Symposium on Discharges and Electrical Insulation in Vacuum, Tomsk, Russia, 2012: 68-71. [25] Kojima H, Aoki K, Hayakawa N, et al.Partial discharge in vacuum on insulator surface under AC voltage application[C]//1stInternational Conference on Electric Power Equipment-Switching Technology, Xi’an, China, 2011: 521-524. [26] Bzaelyan E M, Raizer Y P, Aleksandrov N L.The effect of reduced air density on streamer-to-leader transition and on properties of long positive leader[J]. Journal of Physics D: Applied Physics, 2007, 40:4133-4144 [27] 杨亚奇, 李卫国, 夏喻, 等. 低气压下长间隙工频放电试验平台研究[J]. 科学技术与工程, 2016, 16(31): 155-162. Yang Yaqi, Li Weiguo,Xia Yu, et al.Research on test platform used in AC discharge test under low pressure[J]. Science Technology and Engineering, 2016, 16(31): 155-162. [28] Cobine J D.Gases conductors[M]. London: McGraw-Hill Book Company, 1941. [29] 严璋, 朱德恒. 高电压绝缘技术[M]. 北京: 中国电力出版社, 2007. [30] Rizk F A M, Trinh G N. High voltage engineering[M]. New York: CRC Press, 2014. [31] Engel A V.Ionized gases[M]. London: Oxford University Press, 1965. [32] Xiao D M.Gas discharge and gas insulation[M]. Shanghai: Shanghai Jiao Tong University, 2017. [33] 王伟, 屠幼萍. 高电压技术[M]. 北京: 机械工业出版社, 2013.
2018, Vol. 33 
