特高压换流变压器油纸绝缘交直流击穿特性及选型
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摘要
作为特高压直流系统的核心设备,特高压换流变压器的国产化对我国特高压直流技术的发展具有重要的推动作用。针对特高压换流变压器的实际运行工况,基于不同油纸组合交直流击穿特性,对其油纸选型进行研究。试验结果表明:绝缘油的击穿电压随交流分量的降低而缓慢下降;油纸绝缘的击穿场强随着交流分量的降低而快速上升;油纸绝缘的性能主要由绝缘纸决定,绝缘油对油纸绝缘强度影响较小。从特高压换流变压器网侧与阀侧出发,同时考虑交流、直流电压在油纸复合绝缘中的分布特点,分析油纸选型需要考虑的因素,根据实验结果,最终得到KI-50X绝缘油与魏德曼DPE绝缘纸为最佳油纸组合。研究结果可为特高压换流变压器的制造提供相关数据参考。
As the core equipment of UHVDC system, the UHVDC converter transformer of home manufacture will be significant to the development of UHVDC technology. According the complicated operation condition of UHVDC converter transformer and the compound voltage breakdown characteristics of different oil-paper combinations, this article researches the selection work of oil and paper. The results show that the breakdown voltage of oil declines smoothly with the decrease of AC voltage components, while the breakdown strength of oil-impregnated paper increases rapidly and the insulation performance of oil-paper is mainly decided by the paper instead of oil. Meanwhile, consider the distribution characteristics of AC and DC voltage in the oil-paper insulation and based on the valve and line side of UHVDC converter transformer, this paper analyzes the factors which will influence the selection work. Finally, according the results that KI-50 X oil and DPE paper are the best choice. In a word, this paper can provide some relevant reference dates to the manufacture of UHVDC converter transformer.
As the core equipment of UHVDC system, the UHVDC converter transformer of home manufacture will be significant to the development of UHVDC technology. According the complicated operation condition of UHVDC converter transformer and the compound voltage breakdown characteristics of different oil-paper combinations, this article researches the selection work of oil and paper. The results show that the breakdown voltage of oil declines smoothly with the decrease of AC voltage components, while the breakdown strength of oil-impregnated paper increases rapidly and the insulation performance of oil-paper is mainly decided by the paper instead of oil. Meanwhile, consider the distribution characteristics of AC and DC voltage in the oil-paper insulation and based on the valve and line side of UHVDC converter transformer, this paper analyzes the factors which will influence the selection work. Finally, according the results that KI-50 X oil and DPE paper are the best choice. In a word, this paper can provide some relevant reference dates to the manufacture of UHVDC converter transformer.
引文
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[17]朱晓伟.温度对换流变压器油纸绝缘击穿特性影响的研究[D].哈尔滨:哈尔滨理工大学,2011.
[18]王永红.换流变压器油纸绝缘击穿特性[D].哈尔滨:哈尔滨理工大学,2013.
[19]沙彦超,周远翔,孙清华,等.直流电压分量对交直流叠加电压下油纸绝缘沿面闪络的影响[J].高电压技术,2013,39(6):1337-1343.Sha Yanchao,Zhou Yuanxiang,Sun Qinghua,et al.Influence of DC voltage on creepage flashover of oil-paper insulation under composite AC and DC voltage[J].High Voltage Engineering,2013,39(6):1337-1343(in Chinese).
[20]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 DC combined voltages[J].Proceedings of the CSEE,2015,35(12):3161-3169(in Chinese).
[21]Li J,He Z,Grzybowski S.Electrical aging lifetime model of oil-impregnated paper under pulsating DC voltage influenced by temperature[J].IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(6):1992-1997.
[22]Ebisawa Y,Yamada S,Mori S,et al.DC creepage breakdown characteristics of oil-immersed insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2009,16(6):1686-1692.
[23]Li H,Zhong L,Yu Q,et al.The resistivity of oil and oil-impregnated pressboard varies with temperature and electric field strength[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(4):1851-1856.
[2]吴博,李慧敏,别睿,等.多端柔性直流输电的发展现状及研究展望[J].现代电力,2015,32(2):9-15.Wu Bo,Li Huimin,Bie Rui,et al.Current development and research prospect of VSC-MTDC[J].Modern Electric Power,2015,32(2):9-15(in Chinese).
[3]梁旭明,张平,常勇.高压直流输电技术现状及发展前景[J].电网技术,2012,36(4):1-9.Liang Xunming,Zhang Ping,Chang Yong.Recent advances in high-voltage direct-current power transmission and its developing potential[J].Power System Technology,2012,36(4):11-9(in Chinese).
[4]周小谦.我国“西电东送”的发展历史、规划和实施[J].电网技术,2003,27(5):1-5.Zhou Xiaoqian,Development,planning and implementation of the project of power transmission from West China to East China[J].Power System Technology,2003,27(5):1-5(in Chinese).
[5]郑宝森,郭日彩.中国互联电网的发展[J].电网技术,2003,27(2):1-3.Zheng Baosen,Guo Ricai,On development of interconnection of power networks in China[J].Power System Technology,2003,27(2):1-3(in Chinese).
[6]刘振亚,张启平,董存,等.通过特高压直流实现大型能源基地风、光、火电力大规模高效率安全外送研究[J].中国电机工程学报,2014,34(16):2513-2522.Liu Zhenya,Zhang Qiping,Dong Cun,et al.Efficient and security transmission of wind,photovoltaic and thermal power of large-scale energy resource bases through UHVDC projects[J].Proceedings of the CSEE,2014,34(16):2513-2522(in Chinese).
[7]刘振亚,张启平.国家电网发展模式研究[J].中国电机工程学报,2013,33(7):1-10+25.Liu Zhenya,Zhang Qiping.Study on the development mode of national power grid of China[J].Proceedings of the CSEE,2013,33(7):1-10+25(in Chinese).
[8]孙优良.特高压换流变压器绝缘特性研究[D].保定:华北电力大学,2012.
[9]唐超.油纸绝缘介质的直流空间电荷特性研究[D].重庆:重庆大学,2010.
[10]Tang C,Chen G,Fu M,et al.Space charge behavior in multi-layer oil-paper insulation under different DC voltages and temperatures[J].IEEE Transactions on Dielectrics and Electrical Insulation,2010,17(3):778-788.
[11]陈庆国,张杰,高源,等.混合电场作用下换流变压器阀侧绕组电场分析[J].高电压技术,2008,34(3):484-488.Chen Qingguo,Zhang Jie,Gao Yuan,et al.Analysis of complex electrical field on valve side winding of converter transformer[J].High Voltage Engineering,2008,34(3):484-488(in Chinese).
[12]张燕秉,郑劲,汪德华,等.特高压直流换流变压器的研制[J].高电压技术,2010,36(1):255-264.Zhang Yanbing,Zheng Jin,Wang Dehua,et al.Development of UHVDC converter transformer[J].High Voltage Engineering,2010,36(1):255-264(in Chinese).
[13]傅铁军,王健,钟俊涛,等.直流输电±800k V换流变压器的绝缘结构分析[J].变压器,2009,46(3):1-5.Fu Tiejun,Wang Jian,Zhong Juntao,et al.Insulation structure analysis of±800k V converter transformer for DC transmission[J].Transformer,2009,46(3):1-5(in Chinese).
[14]吴哲.大型换流变压器的电场分析与绝缘结构改进的研究[D].沈阳:沈阳工业大学,2013.
[15]李岩,李晓辉,唐聪,等.换流变压器阀侧绕组端部瞬态电场分析[J].高电压技术,2012,38(11):2797-2804.Li Yan,Li Xiaohui,Tang Cong,et al.Analysis on transient electric field at ends of valve-side winding in converter transformer[J].High Voltage Engineering,2012,38(11):2797-2804(in Chinese).
[16]张杰.换流变压器内部电场分析及油纸绝缘试验系统设计[D].哈尔滨:哈尔滨理工大学,2008.
[17]朱晓伟.温度对换流变压器油纸绝缘击穿特性影响的研究[D].哈尔滨:哈尔滨理工大学,2011.
[18]王永红.换流变压器油纸绝缘击穿特性[D].哈尔滨:哈尔滨理工大学,2013.
[19]沙彦超,周远翔,孙清华,等.直流电压分量对交直流叠加电压下油纸绝缘沿面闪络的影响[J].高电压技术,2013,39(6):1337-1343.Sha Yanchao,Zhou Yuanxiang,Sun Qinghua,et al.Influence of DC voltage on creepage flashover of oil-paper insulation under composite AC and DC voltage[J].High Voltage Engineering,2013,39(6):1337-1343(in Chinese).
[20]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 DC combined voltages[J].Proceedings of the CSEE,2015,35(12):3161-3169(in Chinese).
[21]Li J,He Z,Grzybowski S.Electrical aging lifetime model of oil-impregnated paper under pulsating DC voltage influenced by temperature[J].IEEE Transactions on Dielectrics and Electrical Insulation,2013,20(6):1992-1997.
[22]Ebisawa Y,Yamada S,Mori S,et al.DC creepage breakdown characteristics of oil-immersed insulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2009,16(6):1686-1692.
[23]Li H,Zhong L,Yu Q,et al.The resistivity of oil and oil-impregnated pressboard varies with temperature and electric field strength[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(4):1851-1856.