雾水电导率对输电线路交流电晕特性的影响
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摘要
导线电晕放电会产生能量损失、无线电干扰、可听噪声等效应,但目前关于雾的电导率对导线电晕特性的影响研究还较少。为此,采用超声波雾发生装置,产生不同电导率的雾水,在自制电晕笼中试验研究了雾水电导率对输电线路导线交流电晕特性的影响。研究结果表明:雾水电导率对交流输电线路导线电晕的产生存在显著影响;雾水电导率越高,导线周围空气就越容易发生电离;附着在导线表面的雾颗粒形成小的放电尖端,使导线表面电场发生畸变,雾水电导率越高,畸变就越严重,使导线起晕电压越低。因此输电线路电晕限制条件应考虑雾水电导率的影响。
Corona discharge of conductors may cause power loss,radio disturbance,acoustic noise and so on,and effect of fog conductivity on transmission line corona characteristic is seldom researched.Thus,we experimentally researched and simulated different fog water conductivities in corona cage by using ultrasonic fog generator to research the influence of fog and its conductivity on corona performance of AC transmission lines.The results show that fog water conductivity significantly affects the corona performance: higher fog water conductivity leads to lower corona inception voltage,since it will make the air ionizing severer;the fog water particles adhering to the conductor surface may cause the electric field distortion,which decreases the corona inception voltage consequently.It is concluded that fog water conductivity should be taken into consideration for corona limitiation on transmission lines.
Corona discharge of conductors may cause power loss,radio disturbance,acoustic noise and so on,and effect of fog conductivity on transmission line corona characteristic is seldom researched.Thus,we experimentally researched and simulated different fog water conductivities in corona cage by using ultrasonic fog generator to research the influence of fog and its conductivity on corona performance of AC transmission lines.The results show that fog water conductivity significantly affects the corona performance: higher fog water conductivity leads to lower corona inception voltage,since it will make the air ionizing severer;the fog water particles adhering to the conductor surface may cause the electric field distortion,which decreases the corona inception voltage consequently.It is concluded that fog water conductivity should be taken into consideration for corona limitiation on transmission lines.
引文
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[19]Sebo S A.Model study of HVDC electric field effects[J].IEEE Transactions on Power Apparatus and Systems,1982,101(6):1743-1756.
[20]尤少华,刘云鹏,律方成,等.电晕笼单根导线电晕损失等效修正系数试验研究[J].高电压技术,2011,37(10):2410-2416.YOU Shaohua,LIU Yunpeng,LFangcheng,et al.Test re-search on corona cage single conductors corona loss equivalent correction factor[J].High Voltage Engineering,2011,37(10):2410-2416.
[21]刘云鹏,曾文芳,尤少华,等.在小电晕笼中分裂导线交流电晕的起始电压分析[J].高电压技术,2011,37(9):2302-2307.LIU Yunpeng,ZENG Wenfang,YOU Shaohua,et al.Analy-sis of corona onset voltage of AC split conductors using small corona cage[J].High Voltage Engineering,2011,37(9):2302-2307.
[22]胡琴.低气压下输电线路导线电晕特性及影响因素的研究[D].重庆:重庆大学,2010.HU Qin.Study on corona performance of transmission line conductors and its influencing factors at lower air pressure[D].Chongqing,China:Chongqing University,2010.
[2]安德生J G.345千伏及以上超高压输电线路设计参考手册[M].北京:电力工业出版社,1981:15-49.Anderson J G.Transmission line reference book345kV and a-bove[M].Beijing,China:Electric Power Industry Press,1981:15-49.
[3]粟福珩.高压输电的环境保护[M].北京:水利电力出版社,1989:31-65.SU Fuheng.Environment protection of high-voltage transmis-sion[M].Beijing,China:Water Conservancy and Electric Pow-er Press,1989:31-65.
[4]Nakano Y,Sunaga Y.Availability of corona cage for predicting audible noise generated from HVDC transmission line[J].IEEE Transactions on Power Delivery,1989,4(2):1422-1430.
[5]Nakano Y,Sunaga Y.Availability of corona cage for predicting radio interference generated from HVDC transmission line[J].IEEE Transactions on Power Delivery,1990,5(3):1436-1442.
[6]靳贵平.紫外探测技术与双光谱图像检测系统的研究[D].西安:中国科学院西安光学精密机械研究所,2004.JIN Guiping.The research of ultraviolet technology of detecting and the examining system of double spectrum image[D].Xi’an,China:Xi’an Institute of Optics and Precision Mechanics,Chi-nese Academy of Sciences,2004.
[7]舒立春,宫林,蒋兴良,等.水滴或污秽对导线电晕放电起始特性的影响[J].高电压技术,2008,34(4):633-637.SHU Lichun,GONG Lin,JIANG Xingliang,et al.Corona in-ception discharge characteristics of conductor adhered with water drops or pollution[J].High Voltage Engineering,2008,34(4):633-637.
[8]律方成,尤少华,刘云鹏,等.电晕笼中分裂导线交流电晕损失计算分析[J].高电压技术,2011,37(12):2878-2884.LFangcheng,YOU Shaohua,LIU Yunpeng,et al.Calcula-tion and analysis of bundle conductors’AC corona loss in corona cage[J].High Voltage Engineering,2011,37(12):2878-2884.
[9]胡毅,王力农,邵瑰玮,等.风雨对导线杆-塔空气间隙工频放电特性的影响[J].高电压技术,2008,34(5):845-850.HU Yi,WANG Linong,SHAO Guiwei,et al.Influence of rain and wind on power frequency discharge characteristic of conduc-tor-to-tower air gap[J].High Voltage Engineering,2008,34(5):845-850.
[10]杜伯学,刘勇.人工盐雾环境下环氧树脂的绝缘特性[J].高电压技术,2006,32(6):9-11.DU Boxue,LIU Yong.Insulation performance of epoxy resin under DC electric field and artificial saline fog environments[J].High Voltage Engineering,2006,32(6):9-11.
[11]谷淑芳,金德镇,崔红,等.吉林省云水和雨水酸度的分析[J].吉林气象,1999(2):33-34.GU Shufang,JIN Dezhen,CUI Hong,et al.Analysis of both cloud water and rainwater acidity in Jilin[J].Jilin Meteorolo-gy,1999(2):33-34.
[12]陈克军,陈刚才,张卫东,等.重庆市主城区降雨酸度的影响因子分析[J].矿物岩石地球化学通报,2003,22(2):163-166.CHEN Kejun,CHEN Gangcai,ZHANG Weidong,et al.Af-fecting factors on precipitation acidity in Chongqing city,China[J].Bulletin of Mineralogy Petrology and Geochemistry,2003,22(2):163-166.
[13]郑有飞,唐信英,徐建强,等.南京市江北工业区降水酸性及化学成分分析[J].环境科学研究,2007,20(4):45-51.ZHENG Youfei,TANG Xinying,XU Jianqiang,et al.The analy-sis of precipitation acidity and chemical composition in the industrial estate located on north bank of the yangtze river,Nanjing[J].Re-search of Environmental Sciences,2007,20(4):45-51.
[14]王华,马宁,杨晓静,等.成都市雨水中的重金属特征[J].地球与环境,2010,38(1):49-53.WANG Hua,MA Ning,YANG Xiaojing,et al.Heavy metal characteristics of rainwater in Chengdu[J].Earth and Environ-ment,2010,38(1):49-53.
[15]徐燕萍.南昌市大气颗粒物与酸性降水关系研究[D].南昌:南昌大学,2008.XU Yanping.Study on relationship between atmospheric parti-cles and acid precipitation[D].Nanchang,China:Nanchang University,2008.
[16]林锐.直流正极性下导线电晕放电特性及影响因素的研究[D].重庆:重庆大学,2009.LIN Rui.Research on DC positive corona discharge character-istics of conductors and its affecting factors[D].Chongqing,China:Chongqing University,2009.
[17]赵宇明,麻敏华,楚金伟,等.电晕笼中直流导线起晕电压的测量方法[J].高电压技术,2008,34(8):1567-1572.ZHAO Yuming,MA Minhua,CHU Jinwei,et al.measurement methods for DC conductor corona onset voltage in the corona cage[J].High Voltage Engineering,2008,34(8):1567-1572.
[18]陈澜,卞星明,陈枫林,等.电晕笼内导线交流电晕起始电压判断方法[J].高电压技术,2011,37(1):85-90.CHEN Lan,BIAN Xingming,CHEN Fenglin,et al.Method to judge corona inception voltage of AC transmission lines using coronacage[J].High Voltage Engineering,2011,37(1):85-90.
[19]Sebo S A.Model study of HVDC electric field effects[J].IEEE Transactions on Power Apparatus and Systems,1982,101(6):1743-1756.
[20]尤少华,刘云鹏,律方成,等.电晕笼单根导线电晕损失等效修正系数试验研究[J].高电压技术,2011,37(10):2410-2416.YOU Shaohua,LIU Yunpeng,LFangcheng,et al.Test re-search on corona cage single conductors corona loss equivalent correction factor[J].High Voltage Engineering,2011,37(10):2410-2416.
[21]刘云鹏,曾文芳,尤少华,等.在小电晕笼中分裂导线交流电晕的起始电压分析[J].高电压技术,2011,37(9):2302-2307.LIU Yunpeng,ZENG Wenfang,YOU Shaohua,et al.Analy-sis of corona onset voltage of AC split conductors using small corona cage[J].High Voltage Engineering,2011,37(9):2302-2307.
[22]胡琴.低气压下输电线路导线电晕特性及影响因素的研究[D].重庆:重庆大学,2010.HU Qin.Study on corona performance of transmission line conductors and its influencing factors at lower air pressure[D].Chongqing,China:Chongqing University,2010.