Abstract：The air gap of the insulation system is the main source caused partial discharge (PD) in high voltage power equipment made of oil-paper insulation material. In general, there are two kinds of air gaps, which come out from solid insulation-paper board because of manufacture process and liquid insulation-bubbles in oil. To investigate the characteristic of PD in oil-paper insulation under direct current (DC) voltage, this paper presents the air gap model of paper board and bubbles model in oil with oil-paper insulation system respectively. The partial discharges of these models are measured by Rogowski coil and sampling resistor under direct current voltage in the laboratory. The partial discharge pulses are analyzed and processed by Origin software such as frequency spectrum and filtering. The characteristic of PD pulses of the air gap in oil-paper under DC voltage are described in the end. These results lay the foundation for the PD measurement and recognition in oil-paper insulation system (such as converter transformer) under DC voltage.
孙振权, 赵学风, 李继胜, 顾朝敏, 李彦明. 直流电压下油纸绝缘结构气隙模型的局部放电特性[J]. 电工技术学报, 2010, 25(9): 20-27.
Sun Zhenquan, Zhao Xuefeng, Li Jisheng, Gu Chaomin, Li Yanming. Characteristic of Partial Discharge in Air Gap Model of Oil-Paper Insulation Under DC Voltage. Transactions of China Electrotechnical Society, 2010, 25(9): 20-27.
[1] 王德忠. 高压直流输电技术综述[J]. 上海电器技术, 2004(2): 3-9. Wang Dezhong. An overview of high voltage direct current transmission technology[J]. Shanghai Electric Appliance Technology, 2004(2): 3-9. [2] 韩晓东, 翟亚东. 高压直流输电用换流变压器[J]. 高压电器, 2002, 38(3): 5-6. Han Xiaodong, Zhai Yadong. Han converter trans- former used for HVDC transmission[J]. High Voltage Apparatus, 2002, 38(3): 5-6. [3] 邱昌容, 王乃庆. 电工设备局部放电其测试技术[M]. 北京: 机械工业出版社, 1994. [4] Renate S, Johnl L. Partial discharge testing under direct voltage conditions[J]. IEEE Trans. on Aerospace and Electronic System, 1982, 18(1): 82-93. [5] Renate S. Ramp technique for DC partial discharge testing[J]. IEEE Trans. on Electrical Insulation, 1985, 20(1): 38-46. [6] Fromm U. Interpretation of partial discharge at DC voltages[J]. IEEE Trans. on Dielectrics and Electrical Insulation, 1995, 2(5): 761-770. [7] Peter H F, Johan J. Partial discharges at DC voltage: their mechanism, detection and analysis[J]. IEEE Trans. on Dielectrics and Electrical Insulation, 2005, 12(2): 328-340. [8] 于钦学, 邱昌容, 谢恒坤, 等. 油纸绝缘直流局部放电的研究[J]. 变压器, 1998, 35(5): 17-20. Yu Qinxue, Qiu Changrong, Xie Hengkun, et al. Study on partial discharge in oil-immersed insulation under DC voltage[J]. Transformer, 1998, 35(5): 17-20. [9] 司文荣, 李军浩, 等. 直流电压下油纸绝缘中局部放电的超高频特性[J]. 高电压技术, 2008, 34(7): 1336-1341. Si Wenrong, Li Junhao, et al. Ultra-high frequency characteristic of partial discharge in oil-paper insulation under DC voltage[J]. High Voltage Engineering, 2008, 34(7): 1336-1341. [10] 司文荣, 李军浩, 李彦明, 等. 直流下油中局部放电脉冲波形测量与特性分析[J]. 西安交通大学学报, 2008, 42(4): 481-486. Si Wenrong, Li Junhao, Li Yanming, et al. Measurement and analysis for pulse current shapes of partial discharge in oil under DC voltage[J]. Journal of Xi’ an Jiaotong University, 2008, 42(4): 481-486. [11] 冉汉政, 吴广宁, 于成龙, 等. 膜纸复合储能电容器的直流局部放电信号分析方法[J]. 电工技术学报, 2006, 21(4): 46-49. Ran Hanzheng , Wu Guangning , Yu Chenglong, et al. Study of DC PD analyzing method of energy-story capacitors[J]. Transactions of China Electotechnical Society, 2006, 21(4): 46-49.
2010, Vol. 25 
