换流变压器阀侧套管油纸绝缘研究现状
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摘要
换流变压器作为连接高压直流输电系统交流侧和直流侧的关键设备,其阀侧出线装置可靠性直接关系到电力系统的安全稳定运行。油纸绝缘作为阀侧出线装置的主绝缘,长期受到交/直流复合电场以及极性反转等复杂工况的影响,在受到电场、热场以及机械应力等多场耦合作用下易发生绝缘劣化积累空间电荷,而油纸绝缘介电参数和电导参数的不匹配也将使得界面电荷积累严重,导致沿面闪络或绝缘击穿,这也是目前换流变压器阀侧出线装置油纸绝缘结构发展面临的严峻问题。本文综合国内外研究现状论述了换流变压器阀侧出线装置油纸绝缘研究进展,分析了油纸绝缘在不同环境工况下电荷行为、局部放电和击穿特性,探讨了电场、温度、水分、老化等因素对其的影响,并对绝缘纸改性进行论述,展望了未来换流变压器阀侧出线装置油纸绝缘结构改性的发展趋势。这些研究成果的总结能为油纸绝缘材料的发展、改善提供参考和借鉴。
Converter transformer plays a critical role in the high voltage direct current(HVDC)transmission system. The reliability of the valve side busing is directly related to the safe and stable operation of the power system. As the main insulation of valve side bushing, oil-paper insulation is influenced by AC/DC composite electric field and polarity reversal, meanwhile, it is easy to degrade with the coupling of electric field, heat field and mechanical stress so as to accumulate the space charge.In addition, the interface charge will accumulate seriously by reason of the mismatch between the dielectric parameters and the conductance parameters of oil-paper insulation, which will cause flashover or breakdown. Hence, it is the serious issue that the development of oil-paper insulation structure of converter transformer faces. In this paper, the research progress of the oil-paper insulation of converter transformer is discussed. The charge behavior and the characteristics of partial discharge or breakdown of the oil-paper insulation under different circumstance are analyzed. The influence of electric field, temperature, water and aging degree are discussed. In the meantime, the modification of transformer oil and insulating paper are also discussed, of which advantages and disadvantages are summarized. Moreover, the development trend of modification of oil-paper insulation structure for valve side bushing of converter transformer is prospected. The summary of these research results has the capacity to provide reference for the development of oil-paper insulation in the future.
Converter transformer plays a critical role in the high voltage direct current(HVDC)transmission system. The reliability of the valve side busing is directly related to the safe and stable operation of the power system. As the main insulation of valve side bushing, oil-paper insulation is influenced by AC/DC composite electric field and polarity reversal, meanwhile, it is easy to degrade with the coupling of electric field, heat field and mechanical stress so as to accumulate the space charge.In addition, the interface charge will accumulate seriously by reason of the mismatch between the dielectric parameters and the conductance parameters of oil-paper insulation, which will cause flashover or breakdown. Hence, it is the serious issue that the development of oil-paper insulation structure of converter transformer faces. In this paper, the research progress of the oil-paper insulation of converter transformer is discussed. The charge behavior and the characteristics of partial discharge or breakdown of the oil-paper insulation under different circumstance are analyzed. The influence of electric field, temperature, water and aging degree are discussed. In the meantime, the modification of transformer oil and insulating paper are also discussed, of which advantages and disadvantages are summarized. Moreover, the development trend of modification of oil-paper insulation structure for valve side bushing of converter transformer is prospected. The summary of these research results has the capacity to provide reference for the development of oil-paper insulation in the future.
引文
[1]刘振亚.特高压电网[M].北京:中国电力出版社,2016.
[2]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2011
[3]王鹏.2005年全国直流输电系统运行可靠性分析[J].电力设备,2007,8(4):84-88.Wang Peng.Operation reliability analysis of nationwide HVDC Power transmission system in 2005[J].Electrical Equipment,2007,8(4):84-88.
[4]Gao Youhua,Liu Guowei,Li Yanbin,et al.Study on electric field characteristics of converter transformer on valve side winding[J].Applied Mechanics&Materials,2012,130-134:1413-1417.
[5]CIGRE Joint Working Group A2/B4.28.HVDCconverter transformers guide lines for conducting design reviews for HVDC converter transformers[R]Paris:CIGRE,2010.
[6]国家电网公司2006-2015年变压器(换流变)/高抗故障通报暨提升措施研讨会[R].北京:国家电网公司运维检修部,2016.
[7]廖瑞金,王季宇,袁媛,等.换流变压器下新型纤维素绝缘纸特性综述[J].电工技术学报,2016,31(10):1-15.Liao Ruijin,Wang Jiyu,Yuan Yuan,et al.Review on the characteristic of new cellulose insulation paper used in the converter transformer[J].Transactions of China Electrotechnical Society,2016,31(10):1-15.
[8]王永强,谢军,律方成.基于改进量子粒子群优化稀疏分解的局放信号去噪方法[J].电工技术学报,2015,30(12):320-329.Wang Yongqiang,Xie Jun,LüFangcheng.PD signal denoising method based on improved quantumbehaved particle swarm optimization sparse decomposition[J].Transactions of China Electrotechnical Society,2015,30(12):320-329.
[9]Emsley A M,Xiao X,Heywood R J,et al.Degradation of cellulosic insulation in power transformers.Part 3:Effects of oxygen and water on ageing in oil[J].IEE Proceedings-Science Measurement and Technology,2000,147(3):115-119.
[10]韩民晓,文俊,徐永海.高压直流输电原理与运行[M].北京:机械工业出版社,2013.
[11]Cai Dan,Liu Lie,Cheng Guoxin,et al.Bubble motion in transformer oil under non-uniform electric fields[J].Chin.phys.lett,2013,30(3):037701.
[12]Li Yuan,Zhang Qiaogen,Wang Tonglei,et al.Degradation characteristics of oil-immersed pressboard samples induced by partial discharges under DCvoltage[J].IEEE Transactions on Dielectrics&Electrical Insulation,2017,24(2):1110-1117.
[13]鲍连伟.脉动直流电压下油纸绝缘局部放电特性与多变量失效模型研究[D].重庆:重庆大学,2016.
[14]刘捷丰,廖瑞金,吕彦冬,等.电力变压器油纸绝缘含水量定量评估的时域介电特征量[J].电工技术学报,2015,30(2):196-203.Liu Jiefeng,Liao Ruijin,LüYandong,et al.Time domain dielectric characteristics for quantitative assessment of moisture content in transformer oilpaper insulation[J].Transactions of China Electrotechnical Society,2015,30(2):196-203.
[15]廖瑞金,柳海滨,周年荣,等.绝缘纸热老化对油浸绝缘纸空间电荷生成及迁移特性的影响[J].电工技术学报,2015,30(22):206-214.Liao Ruijin,Liu Haibin,Zhou Nianrong,et al.Influence of insulation paper's thermal aging on the formation and migration behavior of space charge in oil-paper insulation dielectrics[J].Transactions of China Electrotechnical Society,2015,30(22):206-214.
[16]Liu R S,Jaksts A,Tornkvist C,et al.Moisture and space charge in oil-impregnated pressboard under HVDC[C]//IEEE International Conference on Conduction and Breakdown in Solid Dielectrics(ICSD),Vasteras,1998:17-22.
[17]Wakamatsu M,Kato K,Inoue N,et al.DC field measurement in oil/pressboard composite insulation system by electro-optic Kerr effect[J].IEEETransactions on Dielectrics&Electrical Insulation,2003,10(6):942-947.
[18]Du Boxue,Zhu Wenbo,Zhang Jianggong,et al.Surface and interface charge accumulation and decay of oil-paper insulation under DC voltage[J].IEEETransactions on Dielectrics&Electrical Insulation,2017,24(2):939-946.
[19]Du Boxue,Jiang Jinpeng,Zhang Jianggong,et al.Dynamic behavior of surface charge on double-layer oil-paper insulation under pulse voltage[J].IEEETransactions on Dielectrics&Electrical Insulation,2016,23(5):2712-2719.
[20]Du Boxue,Zhang Jianggong.Charge coupling behavior of double-layer oil-paper insulation under DC and pulse voltages[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(4):1-9.
[21]廖瑞金,李伟,杨丽君,等.变压器油纸绝缘介质在直流电场中的空间电荷输运特性[J].高电压技术,2011,37(5):1057-1065.Liao Ruijin,Li Wei,Yang Lijun,et al.Space charge transport properties of oil-paper insulation materials under DC field used in transformer[J].High Voltage Engineering,2011,37(5):1057-1065.
[22]廖瑞金,李伟,杨丽君,等.不同热老化程度油纸绝缘介质在直流电场中的空间电荷特性[J].高电压技术,2011,37(9):2197-2204.Liao Ruijin,Li Wei,Yang Lijun,et al.Space charge properties under DC voltage of oil-paper insulation materials during thermal aging[J].High Voltage Engineering,2011,37(9):2197-2204.
[23]廖瑞金,周之,郝建,等.水分和温度联合作用时油浸绝缘纸空间电荷特性[J].高电压技术,2012,38(10):2647-2654.Liao Ruijin,Zhou Zhi,Hao Jian,et al.Space charge characteristics of oil immersed paper under moisture and temperature effect[J].High Voltage Engineering,2012,38(10):2647-2654.
[24]李剑,徐洪,王艳,等.脉动直流电压下油中电晕老化过程中油纸绝缘的空间电荷特性[J].高电压技术,2012,38(10):2662-2668.Li Jian,Xu Hong,Wang Yan,et al.Space charge properties of oil-paper insulation during aging process by corona in oil at DC pulsating voltage[J].High Voltage Engineering,2012,38(10):2662-2668.
[25]郝建,黄博,George Chen,等.空间电荷在多层结构油纸绝缘混合体系的积聚规律及其对电场分布的影响[J].高电压技术,2017,43(6):1973-1979.Hao Jian,Huang Bo,George Chen,et al.Space charge accumulation behavior of multilayer structure oil-paper insulation and its effect on electric field distribution[J].High Voltage Engineering,2017,43(6):1973-1979.
[26]Huang Bo,Hao Miao,Hao Jian,et al.Space charge characteristics in oil and oil-impregnated pressboard and electric field distortion after polarity reversal[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(2):881-891.
[27]Huang Meng,Zhou Yuanxiang,Chen Weijiang,et al.Influence of voltage reversal on space charge behavior in oil-paper insulation[J].IEEE Transactions on Dielectrics&Electrical Insulation,2014,21(1):331-339.
[28]吴锴,朱庆东,王浩森,等.温度梯度下双层油纸绝缘系统的空间电荷分布特性[J].高电压技术,2012,38(9):2366-2372.Wu Kai,Zhu Qingdong,Wang Haosen,et al.Space charge distribution characteristic in double-layer oil impregnated papers under temperature gradient[J].High Voltage Engineering,2012,38(9):2366-2372.
[29]Wu Kai,Zhu Qingdong,Wang Haosen,et al.Space charge behavior in the sample with two layers of oil-immersed-paper and oil[J].IEEE Transactions on Dielectrics&Electrical Insulation,2014,21(4):1857-1865.
[30]Qi Bo,Zhao Xiaolin,Li Chengrong,et al.Electric field distribution in oil-pressboard insulation under AC-DC combined voltages[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(4):1935-1941.
[31]齐波,陈义龙,李成榕,等.交直流复合非均匀电场下油纸绝缘界面电荷的特性[J].中国电机工程学报,2013,33(34):241-249.Qi Bo,Chen Yilong,Li Chengrong,et al.Characteristics of interface charge on oil-impregnated pressboard under non-uniform AC-DC combined electric field[J]Proceedings of the CSEE,2013,33(34):241-249.
[32]孙振权,赵学风,李继胜,等.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,et al.Characteristic of partial discharge in air gap model of oil-paper insulation under DC voltage[J].Transactions of China Electrotechnical Society,2010,25(9):20-27.
[33]杨丽君,黄加佳,许佐明,等.高压交流套管的油纸绝缘热老化特性及寿命模型研究[J].电工技术学报,2016,31(5):144-151.Yang Lijun,Huang Jiajia,Xu Zuoming,et al.Investigation on thermal aging characteristics and lifetime model of oil-paper insulation for HV ACbushing[J].Transactions of China Electrotechnical Society,2016,31(5):144-151.
[34]Takahashi E,Shirasaka Y,Okuyama K,et al.Analysis of an anisotropic nonlinear electric field with a discussion of dielectric test for converter transformers and smoothing reactors[J].IEEETransactions on Power Apparatus&Systems,1994,9(3):1480-1486.
[35]Tianyan J,Cavallini A,Montanari G,et al.Partial discharge activities of pressboard/oil insulation under AC plus DC voltages[C]//IEEE international conference on solid dielectrics(ICSD),Bologna,2013:267-270.
[36]Mahmud S,Chen G,Golosnoy I,et al.Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil[J].IEEETransactions on Dielectric and Electrical Insulation2015,22(1):152-160.
[37]齐波,魏振,李成榕,等.交直流复合电场中油纸绝缘沿面放电现象及特征[J].电工技术学报,2016,31(10):59-67.Qi Bo,Wei Zhen,Li Chengrong,et al.The phenomena and characteristics of oil-paper insulation surface discharge under AC and DC voltage[J].Transactions of China Electrotechnical Society,2016,31(10):59-67.
[38]齐波,魏振,高怡,等.不同比例交直流复合电场作用下油纸绝缘内部气隙放电的特征[J].中国电机工程学报,2015,35(12):3161-3169.Qi Bo,Wei Zhen,Gao Yi,et al.Discharge characteristics of internal gas-gap defect in oil-paper insulation under different proportion of AC and DCcombined voltages[J].Proceedings of the CSEE,2015,35(12):3161-3169.
[39]戴佺民,齐波,卓然,等.油浸纸套管电容芯子浸渍不良缺陷的放电过程及其特征[J].电工技术学报,2017,32(7):181-189.Dai Quanmin,Qi Bo,Zhuo Ran,et al.Discharge process and characteristics of the poor impregnated defect of capacitor core in oil-immigrated paper bushing[J].Transactions of China Electrotechnical Society,2017,32(7):181-189.
[40]池明赫,陈庆国,王新宇,等.温度对复合电压下油纸绝缘电场分布的影响[J].中国电机工程学报,2015,5(6):1524-1532.Chi Minghe,Chen Qingguo,Wang Xinyu,et al Influence of temperature on electric field distribution of oil-paper insulation under compound voltage[J].Proceedings of the CSEE,2015,5(6):1524-1532.
[41]Takahashi E,Tsutsumi Y,Okuyama K,et al.Partial discharge characteristics of oil-immersed insulation systems under DC,combined AC-DC and DCreversed polarity voltage[J].IEEE Transactions on Power Apparatus&Systems,1976,95(1):411-420.
[42]Raghuveer M R,Kolaczkowski Z,Jin W,et al.Surface electric strength of processed pressboard under composite AC and DC and conventional stresses[J].IEEE Transactions on Dielectrics and Electrical Insulation,1990,25(2):341-350.
[43]Wang Yonghong,Wei Xinlao,Chen Qingguo,et al Breakdown characteristics of converter transformer insulation under composite AC and DC voltage[C]//IEEE 9th international conference on the properties and applications of dielectric materials(ICPADM),Harbin,2009:634-637.
[44]王艳.脉动直流电压下油纸绝缘电老化特性与双变量威布尔失效模型研究[D].重庆:重庆大学,2014.
[45]何志满.油纸绝缘在脉动直流电压下的失效模型与热老化可靠性评估方法[D].重庆:重庆大学,2013.
[46]黄猛.电热耦合下油纸绝缘空间电荷及其对击穿的影响[D].北京:清华大学,2016.
[47]金福宝.交直流复合电压下油纸绝缘沿面放电特性研究[D].北京:清华大学,2015.
[48]Du Boxue,Li Xiaolong,Jiang Jinpeng.Surface charge accumulation and decay on direct fluorinated oil-impregnated paper[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(5):3094-3101.
[49]Du Boxue,Zhu Wenbo,Li Xiaolong.Effects of direct fluorination on charge coupling behavior of oil-paper insulation under DC and pulse voltages[J].IEEETransactions on Dielectrics&Electrical Insulation2017,24(2):947-955.
[50]廖瑞金,刘团,杨丽君,等.纳米改性纤维素绝缘纸在直流场中的空间电荷分布特性[J].高电压技术,2015,41(9):3006-3013.Liao Ruijin,Liu Tuan,Yang Lijun,et al.Space charge characteristics of cellulose insulation paper with nano-modified under DC field[J].High Voltage Engineering,2015,41(9):3006-3013.
[51]吕程,廖瑞金,吴伟强,等.纳米TiO2对油纸绝缘介质直流空间电荷特性的影响[J].高电压技术,2015,41(2):417-423.LüCheng,Liao Ruijin,Wu Weiqiang,et al.Influence of nano-TiO2 on DC space charge characteristics of oil-paper insulation material[J].High Voltage Engineering,2015,41(2):417-423.
[52]Liu Heqian,Chen Qingguo,Zhuge Xiangli,et al.Analysis of the dielectric and breakdown characteristics of nano MMT modified insulation pressboard[C]//IEEE International Forum on Strategic Technology,Cox's Bazar,2014:448-451.
[2]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2011
[3]王鹏.2005年全国直流输电系统运行可靠性分析[J].电力设备,2007,8(4):84-88.Wang Peng.Operation reliability analysis of nationwide HVDC Power transmission system in 2005[J].Electrical Equipment,2007,8(4):84-88.
[4]Gao Youhua,Liu Guowei,Li Yanbin,et al.Study on electric field characteristics of converter transformer on valve side winding[J].Applied Mechanics&Materials,2012,130-134:1413-1417.
[5]CIGRE Joint Working Group A2/B4.28.HVDCconverter transformers guide lines for conducting design reviews for HVDC converter transformers[R]Paris:CIGRE,2010.
[6]国家电网公司2006-2015年变压器(换流变)/高抗故障通报暨提升措施研讨会[R].北京:国家电网公司运维检修部,2016.
[7]廖瑞金,王季宇,袁媛,等.换流变压器下新型纤维素绝缘纸特性综述[J].电工技术学报,2016,31(10):1-15.Liao Ruijin,Wang Jiyu,Yuan Yuan,et al.Review on the characteristic of new cellulose insulation paper used in the converter transformer[J].Transactions of China Electrotechnical Society,2016,31(10):1-15.
[8]王永强,谢军,律方成.基于改进量子粒子群优化稀疏分解的局放信号去噪方法[J].电工技术学报,2015,30(12):320-329.Wang Yongqiang,Xie Jun,LüFangcheng.PD signal denoising method based on improved quantumbehaved particle swarm optimization sparse decomposition[J].Transactions of China Electrotechnical Society,2015,30(12):320-329.
[9]Emsley A M,Xiao X,Heywood R J,et al.Degradation of cellulosic insulation in power transformers.Part 3:Effects of oxygen and water on ageing in oil[J].IEE Proceedings-Science Measurement and Technology,2000,147(3):115-119.
[10]韩民晓,文俊,徐永海.高压直流输电原理与运行[M].北京:机械工业出版社,2013.
[11]Cai Dan,Liu Lie,Cheng Guoxin,et al.Bubble motion in transformer oil under non-uniform electric fields[J].Chin.phys.lett,2013,30(3):037701.
[12]Li Yuan,Zhang Qiaogen,Wang Tonglei,et al.Degradation characteristics of oil-immersed pressboard samples induced by partial discharges under DCvoltage[J].IEEE Transactions on Dielectrics&Electrical Insulation,2017,24(2):1110-1117.
[13]鲍连伟.脉动直流电压下油纸绝缘局部放电特性与多变量失效模型研究[D].重庆:重庆大学,2016.
[14]刘捷丰,廖瑞金,吕彦冬,等.电力变压器油纸绝缘含水量定量评估的时域介电特征量[J].电工技术学报,2015,30(2):196-203.Liu Jiefeng,Liao Ruijin,LüYandong,et al.Time domain dielectric characteristics for quantitative assessment of moisture content in transformer oilpaper insulation[J].Transactions of China Electrotechnical Society,2015,30(2):196-203.
[15]廖瑞金,柳海滨,周年荣,等.绝缘纸热老化对油浸绝缘纸空间电荷生成及迁移特性的影响[J].电工技术学报,2015,30(22):206-214.Liao Ruijin,Liu Haibin,Zhou Nianrong,et al.Influence of insulation paper's thermal aging on the formation and migration behavior of space charge in oil-paper insulation dielectrics[J].Transactions of China Electrotechnical Society,2015,30(22):206-214.
[16]Liu R S,Jaksts A,Tornkvist C,et al.Moisture and space charge in oil-impregnated pressboard under HVDC[C]//IEEE International Conference on Conduction and Breakdown in Solid Dielectrics(ICSD),Vasteras,1998:17-22.
[17]Wakamatsu M,Kato K,Inoue N,et al.DC field measurement in oil/pressboard composite insulation system by electro-optic Kerr effect[J].IEEETransactions on Dielectrics&Electrical Insulation,2003,10(6):942-947.
[18]Du Boxue,Zhu Wenbo,Zhang Jianggong,et al.Surface and interface charge accumulation and decay of oil-paper insulation under DC voltage[J].IEEETransactions on Dielectrics&Electrical Insulation,2017,24(2):939-946.
[19]Du Boxue,Jiang Jinpeng,Zhang Jianggong,et al.Dynamic behavior of surface charge on double-layer oil-paper insulation under pulse voltage[J].IEEETransactions on Dielectrics&Electrical Insulation,2016,23(5):2712-2719.
[20]Du Boxue,Zhang Jianggong.Charge coupling behavior of double-layer oil-paper insulation under DC and pulse voltages[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(4):1-9.
[21]廖瑞金,李伟,杨丽君,等.变压器油纸绝缘介质在直流电场中的空间电荷输运特性[J].高电压技术,2011,37(5):1057-1065.Liao Ruijin,Li Wei,Yang Lijun,et al.Space charge transport properties of oil-paper insulation materials under DC field used in transformer[J].High Voltage Engineering,2011,37(5):1057-1065.
[22]廖瑞金,李伟,杨丽君,等.不同热老化程度油纸绝缘介质在直流电场中的空间电荷特性[J].高电压技术,2011,37(9):2197-2204.Liao Ruijin,Li Wei,Yang Lijun,et al.Space charge properties under DC voltage of oil-paper insulation materials during thermal aging[J].High Voltage Engineering,2011,37(9):2197-2204.
[23]廖瑞金,周之,郝建,等.水分和温度联合作用时油浸绝缘纸空间电荷特性[J].高电压技术,2012,38(10):2647-2654.Liao Ruijin,Zhou Zhi,Hao Jian,et al.Space charge characteristics of oil immersed paper under moisture and temperature effect[J].High Voltage Engineering,2012,38(10):2647-2654.
[24]李剑,徐洪,王艳,等.脉动直流电压下油中电晕老化过程中油纸绝缘的空间电荷特性[J].高电压技术,2012,38(10):2662-2668.Li Jian,Xu Hong,Wang Yan,et al.Space charge properties of oil-paper insulation during aging process by corona in oil at DC pulsating voltage[J].High Voltage Engineering,2012,38(10):2662-2668.
[25]郝建,黄博,George Chen,等.空间电荷在多层结构油纸绝缘混合体系的积聚规律及其对电场分布的影响[J].高电压技术,2017,43(6):1973-1979.Hao Jian,Huang Bo,George Chen,et al.Space charge accumulation behavior of multilayer structure oil-paper insulation and its effect on electric field distribution[J].High Voltage Engineering,2017,43(6):1973-1979.
[26]Huang Bo,Hao Miao,Hao Jian,et al.Space charge characteristics in oil and oil-impregnated pressboard and electric field distortion after polarity reversal[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(2):881-891.
[27]Huang Meng,Zhou Yuanxiang,Chen Weijiang,et al.Influence of voltage reversal on space charge behavior in oil-paper insulation[J].IEEE Transactions on Dielectrics&Electrical Insulation,2014,21(1):331-339.
[28]吴锴,朱庆东,王浩森,等.温度梯度下双层油纸绝缘系统的空间电荷分布特性[J].高电压技术,2012,38(9):2366-2372.Wu Kai,Zhu Qingdong,Wang Haosen,et al.Space charge distribution characteristic in double-layer oil impregnated papers under temperature gradient[J].High Voltage Engineering,2012,38(9):2366-2372.
[29]Wu Kai,Zhu Qingdong,Wang Haosen,et al.Space charge behavior in the sample with two layers of oil-immersed-paper and oil[J].IEEE Transactions on Dielectrics&Electrical Insulation,2014,21(4):1857-1865.
[30]Qi Bo,Zhao Xiaolin,Li Chengrong,et al.Electric field distribution in oil-pressboard insulation under AC-DC combined voltages[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(4):1935-1941.
[31]齐波,陈义龙,李成榕,等.交直流复合非均匀电场下油纸绝缘界面电荷的特性[J].中国电机工程学报,2013,33(34):241-249.Qi Bo,Chen Yilong,Li Chengrong,et al.Characteristics of interface charge on oil-impregnated pressboard under non-uniform AC-DC combined electric field[J]Proceedings of the CSEE,2013,33(34):241-249.
[32]孙振权,赵学风,李继胜,等.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,et al.Characteristic of partial discharge in air gap model of oil-paper insulation under DC voltage[J].Transactions of China Electrotechnical Society,2010,25(9):20-27.
[33]杨丽君,黄加佳,许佐明,等.高压交流套管的油纸绝缘热老化特性及寿命模型研究[J].电工技术学报,2016,31(5):144-151.Yang Lijun,Huang Jiajia,Xu Zuoming,et al.Investigation on thermal aging characteristics and lifetime model of oil-paper insulation for HV ACbushing[J].Transactions of China Electrotechnical Society,2016,31(5):144-151.
[34]Takahashi E,Shirasaka Y,Okuyama K,et al.Analysis of an anisotropic nonlinear electric field with a discussion of dielectric test for converter transformers and smoothing reactors[J].IEEETransactions on Power Apparatus&Systems,1994,9(3):1480-1486.
[35]Tianyan J,Cavallini A,Montanari G,et al.Partial discharge activities of pressboard/oil insulation under AC plus DC voltages[C]//IEEE international conference on solid dielectrics(ICSD),Bologna,2013:267-270.
[36]Mahmud S,Chen G,Golosnoy I,et al.Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil[J].IEEETransactions on Dielectric and Electrical Insulation2015,22(1):152-160.
[37]齐波,魏振,李成榕,等.交直流复合电场中油纸绝缘沿面放电现象及特征[J].电工技术学报,2016,31(10):59-67.Qi Bo,Wei Zhen,Li Chengrong,et al.The phenomena and characteristics of oil-paper insulation surface discharge under AC and DC voltage[J].Transactions of China Electrotechnical Society,2016,31(10):59-67.
[38]齐波,魏振,高怡,等.不同比例交直流复合电场作用下油纸绝缘内部气隙放电的特征[J].中国电机工程学报,2015,35(12):3161-3169.Qi Bo,Wei Zhen,Gao Yi,et al.Discharge characteristics of internal gas-gap defect in oil-paper insulation under different proportion of AC and DCcombined voltages[J].Proceedings of the CSEE,2015,35(12):3161-3169.
[39]戴佺民,齐波,卓然,等.油浸纸套管电容芯子浸渍不良缺陷的放电过程及其特征[J].电工技术学报,2017,32(7):181-189.Dai Quanmin,Qi Bo,Zhuo Ran,et al.Discharge process and characteristics of the poor impregnated defect of capacitor core in oil-immigrated paper bushing[J].Transactions of China Electrotechnical Society,2017,32(7):181-189.
[40]池明赫,陈庆国,王新宇,等.温度对复合电压下油纸绝缘电场分布的影响[J].中国电机工程学报,2015,5(6):1524-1532.Chi Minghe,Chen Qingguo,Wang Xinyu,et al Influence of temperature on electric field distribution of oil-paper insulation under compound voltage[J].Proceedings of the CSEE,2015,5(6):1524-1532.
[41]Takahashi E,Tsutsumi Y,Okuyama K,et al.Partial discharge characteristics of oil-immersed insulation systems under DC,combined AC-DC and DCreversed polarity voltage[J].IEEE Transactions on Power Apparatus&Systems,1976,95(1):411-420.
[42]Raghuveer M R,Kolaczkowski Z,Jin W,et al.Surface electric strength of processed pressboard under composite AC and DC and conventional stresses[J].IEEE Transactions on Dielectrics and Electrical Insulation,1990,25(2):341-350.
[43]Wang Yonghong,Wei Xinlao,Chen Qingguo,et al Breakdown characteristics of converter transformer insulation under composite AC and DC voltage[C]//IEEE 9th international conference on the properties and applications of dielectric materials(ICPADM),Harbin,2009:634-637.
[44]王艳.脉动直流电压下油纸绝缘电老化特性与双变量威布尔失效模型研究[D].重庆:重庆大学,2014.
[45]何志满.油纸绝缘在脉动直流电压下的失效模型与热老化可靠性评估方法[D].重庆:重庆大学,2013.
[46]黄猛.电热耦合下油纸绝缘空间电荷及其对击穿的影响[D].北京:清华大学,2016.
[47]金福宝.交直流复合电压下油纸绝缘沿面放电特性研究[D].北京:清华大学,2015.
[48]Du Boxue,Li Xiaolong,Jiang Jinpeng.Surface charge accumulation and decay on direct fluorinated oil-impregnated paper[J].IEEE Transactions on Dielectrics&Electrical Insulation,2016,23(5):3094-3101.
[49]Du Boxue,Zhu Wenbo,Li Xiaolong.Effects of direct fluorination on charge coupling behavior of oil-paper insulation under DC and pulse voltages[J].IEEETransactions on Dielectrics&Electrical Insulation2017,24(2):947-955.
[50]廖瑞金,刘团,杨丽君,等.纳米改性纤维素绝缘纸在直流场中的空间电荷分布特性[J].高电压技术,2015,41(9):3006-3013.Liao Ruijin,Liu Tuan,Yang Lijun,et al.Space charge characteristics of cellulose insulation paper with nano-modified under DC field[J].High Voltage Engineering,2015,41(9):3006-3013.
[51]吕程,廖瑞金,吴伟强,等.纳米TiO2对油纸绝缘介质直流空间电荷特性的影响[J].高电压技术,2015,41(2):417-423.LüCheng,Liao Ruijin,Wu Weiqiang,et al.Influence of nano-TiO2 on DC space charge characteristics of oil-paper insulation material[J].High Voltage Engineering,2015,41(2):417-423.
[52]Liu Heqian,Chen Qingguo,Zhuge Xiangli,et al.Analysis of the dielectric and breakdown characteristics of nano MMT modified insulation pressboard[C]//IEEE International Forum on Strategic Technology,Cox's Bazar,2014:448-451.