通过降低泄漏电流提高UHVDC盘型瓷绝缘子的抗金具腐蚀能力
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摘要
高压直流输电方式为我国实现更大范围内的资源优化配置发挥着重要的作用。瓷绝缘子作为一种重要的输电线路设备,具有多年的运行经验,在机械、电气和化学稳定性等方面也具有许多优点,在中国特高压直流输电工程中被广泛采用。但是在直流电场的作用下,绝缘子表面的泄漏电流会造成绝缘子金具的电解腐蚀。为减少这种金具腐蚀的概率,将原有绝缘子作为母体,根据对金具腐蚀的理论分析,通过设置附件装置来抑制泄漏电流的产生和发展。试验结果表明,应用附件装置可以大幅度减少泄漏电流,研究结果对提高特高压直流盘型瓷绝缘子的金具腐蚀具有一定的指导意义。
UHVDC power transmission plays an important role in China in realizing optimal allocation of resources in larger area. As a kind of important transmission line equipment, porcelain insulators have operation experience of many years with many advantages in terms of mechanical, electrical and chemical stability, widely used in Chinese UHVDC transmission projects. However, under DC electric field, leakage current on insulator's surface causes electrolytic corrosion of insulator fitting. In order to reduce probability of metal-fitting corrosion, the original insulator is taken as parent body, and according to theoretical analysis of metal-fitting corrosion, an attached part is installed to suppress generation and development of leakage current on surface of the parent body. Experiment results show that application of the attached part can greatly reduce the leakage current, and the research results are of guiding significance to improve metal-fitting corrosion resistance of UHVDC disc porcelain insulators.
UHVDC power transmission plays an important role in China in realizing optimal allocation of resources in larger area. As a kind of important transmission line equipment, porcelain insulators have operation experience of many years with many advantages in terms of mechanical, electrical and chemical stability, widely used in Chinese UHVDC transmission projects. However, under DC electric field, leakage current on insulator's surface causes electrolytic corrosion of insulator fitting. In order to reduce probability of metal-fitting corrosion, the original insulator is taken as parent body, and according to theoretical analysis of metal-fitting corrosion, an attached part is installed to suppress generation and development of leakage current on surface of the parent body. Experiment results show that application of the attached part can greatly reduce the leakage current, and the research results are of guiding significance to improve metal-fitting corrosion resistance of UHVDC disc porcelain insulators.
引文
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[24]邓世聪,周荣林,张德赛,等.应用附件系统提高线路绝缘子的工频干闪络和湿闪络电压[J].武汉大学学报(工学版),2014(6):820-824.Deng Shicong,Zhou Ronglin,Zhang Desai,et al.Improvement of dry flashover voltage and wet flashover voltage of line insulators with accessories system[J].Engineering Journal of Wuhan University,2014(6):820-824(in Chinese).
[2]李立涅.特高压直流输电的技术特点和工程应用[J].电力系统自动化,2005,29(24):5-6.Li Licheng.Technology and application of UHV DC transmission line[J].Automation of Electric Power Systems,2005,29(24):5-6(in Chinese).
[3]张文亮,于永清,李光范,等.特高压直流技术研究[J].中国电机工程学报,2007,27(22):1-7.Zhang Wenliang,Yu Yongqing,Li Guangfan,et al.Researches on UHVDC technology[J].Proceedings of the CSEE,2007,27(22):1-7(in Chinese).
[4]关志成,张福增,王国利,等.我国特高压的特有技术问题[J].电力设备,2006,7(1):1-4.Guan Zhicheng,Zhang Fuzeng,Wang Guoli,et al.Peculiar technology problems of UHV in China[J].Electrical Equipment,2006,7(1):1-4(in Chinese).
[5]刘泽洪,高理迎,余军,等.±1000kV特高压直流输电技术研发思路(英文)[J].中国电机工程学报,2009,29(22):76-82.Liu Zehong,Gao Liying,Yu Jun,et al.R&D ideas of±1000 kVUHVDC transmission technology[J].Proceedings of the CSEE,2009,29(22):76-82(in Chinese).
[6]饶宏.高海拔直流外绝缘技术[M].北京:中国电力出版社,2014.
[7]吴光亚.我国绝缘子的发展现状及应考虑的问题[J].电瓷避雷器,2010,19(2):7-11.Wu Guangya.Development of China’s insulator and the issue should be considered[J].Insulators and Surge Arresters,2010,19(2):7-11(in Chinese).
[8]李黎,华奎,李哲,等.±800 kV特高压换流站支柱绝缘子自然积污特性[J].电网技术,2016,40(12):3951-3957.Li Li,Hua Kui,Li Zhe,et al.Contamination accumulating features of post insulators in±800 kV UHVDC convertor station[J].Power System Technology,2016,40(12):3951-3957(in Chinese).
[9]陈杭,张志劲,冉军德,等.XHP-160绝缘子积污特性仿真分析及试验验证[J].电网技术,2017,41(11):3698-3704.Chen Hang,Zhang Zhijin,Ran Junde,et al.Research on contamination characteristics of XHP-160 insulator based on computational fluid dynamics[J].Power System Technology,2017,41(11):3698-3704(in Chinese).
[10]李景禄.电力系统防污闪技术[M].北京:中国水利水电出版社,2010.
[11]喻华玉,徐文澄,沈刚.高压电气设备防污闪及带电清洗技术[M].北京:中国电力出版社,2006.
[12]胡毅.“2.22电网大面积污闪”原因分析及防污闪对策探讨[J].电瓷避雷器,2001(2):3-6.Hu Yi.The analysis of“the pollution of network on Feb.22th”and counter measures from pollution flashover[J].Insulators and Surge Arresters,2001(2):3-6(in Chinese).
[13]丘志贤.关于污秽条件下使用的高压绝缘子的选择和尺寸确定方法[J].电瓷避雷器,2010(5):6-11.Qiu Zhixian.Demensioning and selection of high voltage insulators used polluted conditions[J].Insulators and Surge Arresters,2010(5):6-11(in Chinese).
[14]朱德恒,严璋.高电压绝缘[M].北京:清华大学出版社,1992.
[15]刘炳尧.高电压绝缘基础[M].长沙:湖南大学出版社,1986.
[16]库弗尔E,岑格尔W S.高电压工程基础[M].邱毓昌,戚庆成,译.北京:机械工业出版社,1993.
[17]谢恒垫.电气绝缘结构设计原理[M].北京:机械工业出版社,1993.
[18]邱志贤.高压绝缘子的设计与应用[M].北京:中国电力出版社,2006.
[19]关志成.绝缘子及输变电设备外绝缘[M].北京:清华大学出版社,2006.
[20]巫松桢.电气绝缘材料科学与工程[M].西安:西安交通大学出版社,1996.
[21]张德赛.一种能提高外绝缘电气强度的绝缘子:ZL200810197722.5[P].2009-04-15.
[22]熊刚,张德赛,余长国,等.应用屏障装置提高复合线路绝缘子的外绝缘性能[J].电瓷避雷器,2012(5):5-8.Xiong Gang,Zhang Desai,Yu Changguo,et al.Improvement of external insulation properties of the composite line insulator with barrier device[J].Insulator and Surge Arresters,2012(5):5-8(in Chinese).
[23]阳少军,张德赛,杨龙,等.应用附件系统提高复合支柱绝缘子的干闪络电压[J].电瓷避雷器,2013(2):1-4.Yang Shaojun,Zhang Desai,Yang Long,et al.Improvement of the dry flashover voltage of composite post insulator with accessories system[J].Insulator and Surge Arresters,2013(2):1-4(in Chinese).
[24]邓世聪,周荣林,张德赛,等.应用附件系统提高线路绝缘子的工频干闪络和湿闪络电压[J].武汉大学学报(工学版),2014(6):820-824.Deng Shicong,Zhou Ronglin,Zhang Desai,et al.Improvement of dry flashover voltage and wet flashover voltage of line insulators with accessories system[J].Engineering Journal of Wuhan University,2014(6):820-824(in Chinese).