高压开关柜局部放电地电波幅值的经验累计分布特性
|
摘要
研究局部放电地电波幅值的分布特性有利于提高开关柜局放状态判断的准确性。文中以36 628组在运行高压开关柜局放实测数据为分析对象,建立了高压开关柜局部放电地电波法现场测试值的经验累计分布特性,其概率密度函数符合Gamma分布特征。并且,统计得出本地区数据库中分布概率超过5%、10%、25%地电波测试值样本分布所对应的经验阈值分别为32、23、13 dB。分析表明,环境湿度、运行时间及柜体结构等7个因素对经验累计分布特性影响较大。上述结果为掌握高压开关柜绝缘健康水平及采取有效的运维策略提供了思路和建议。
It is beneficial to guide state judgment of HV switchgear and improve their insulation state detection accuracy through the study of distribution characteristics of partial discharge wave detection.In this paper,36 628 partial discharge data of HV switchgear are analyzed,and a series of novel empirical cumulative distribution functions(ECDFs)based on on-site transient earth voltage(TEV)data of HV switchgear is proposed,whose probability density function(PDF)meet the Gamma distribution.According to the distribution criteria of 5%,10%and 25%,the local empirical thresholds of TEV data which exceeded 5%,10%and 25%are 32 dB、23 dB and 13 dB.In addition,a total of 11 factors includes test site,test environment,run time and switch cabinet structure are researched to analyze the influences to ECDFs.The result shows that,7 factors of humidity,run time and the cabinet structure to experience a greater impact on the cumulative distribution,it provides ideas and suggestions for mastering the HV switchgear insulation health and taking effective operation and maintenance strategy.
It is beneficial to guide state judgment of HV switchgear and improve their insulation state detection accuracy through the study of distribution characteristics of partial discharge wave detection.In this paper,36 628 partial discharge data of HV switchgear are analyzed,and a series of novel empirical cumulative distribution functions(ECDFs)based on on-site transient earth voltage(TEV)data of HV switchgear is proposed,whose probability density function(PDF)meet the Gamma distribution.According to the distribution criteria of 5%,10%and 25%,the local empirical thresholds of TEV data which exceeded 5%,10%and 25%are 32 dB、23 dB and 13 dB.In addition,a total of 11 factors includes test site,test environment,run time and switch cabinet structure are researched to analyze the influences to ECDFs.The result shows that,7 factors of humidity,run time and the cabinet structure to experience a greater impact on the cumulative distribution,it provides ideas and suggestions for mastering the HV switchgear insulation health and taking effective operation and maintenance strategy.
引文
[1]严璋.电气绝缘在线检测技术[M].北京:水利电力出版社,1995.YAN Zhang.The online detection technology of electrical insulation[M].Beijing:Water Conservancy and Electric Power Press,1995.
[2]关永刚,钱家骊.射频法在高压开关柜局放监测中的应用研究[J].高压电器,2001,37(5):1-3.GUAN Yonggang,QIAN Jiali.Practical study of radio frequency signal used in on-line PD monitoring of HVswitchboard[J].High Voltage Apparatus,2001,37(5):1-3.
[3]蒙恩,徐文,黄海龙.高压开关柜局部放电在线监测研究[J].设计与分析,2014(21):124-126.MENG En,XU Wen,HUANG Hailong.Study on on-line PD monitoring of HV switchboard[J].Design and Analysis,2014(21):124-126.
[4]曾雄杰,江健武.TEV和UHF在10 kV开关柜带电检测中的应用[J].高压电器,2012,48(1):41-47.ZENG Xiongjie,JIANG Jianwu.TEV and UHF application in 10 kV switchgear electrical detection[J].High Voltage Apparatus,2012,48(1):41-47.
[5]刘云鹏,王娟.高压开关柜局部放电UHF在线检测系统的研制[J].高压电器,2009,45(1):15-17.LIU Yunpeng,WANG Juan.The development of the highvoltage switchgear on-line partial discharge UHF detection system[J].High Voltage Apparatus,2009,45(1):15-17.
[6]YAO M.The application of temporary earth voltage(tev)measurement in the online monitoring of the partial discharge of HV switch cabinet[J].Electricity Distribution.2010,45(1):134-138.
[7]ADMANE,M,SONNE M,ZHANG,Q.Simulation of Electric transmission lines with skin effect based on a reduced order differential model,reliability in electromagnetic systems[J].Colloquium on IET,2000,36(8):169-174.
[8]陈水明,许菁,何金良.特快速暂态过电压及其对主变的影响[J].清华大学学报,2005,45(4):573-576.CHEN Shuiming,XU Jing,HE Jinliang.Very fast transient over-voltages and their effects on power transformers[J].Journal of Tsinghua University,2005,45(4):573-576.
[9]粟琼.趋肤效应对圆柱导线电阻和电感的影响[J].黔东南民族师范高等专科学校学报,2005,25(16):15-18.LIQiong.Effectofskineffectontheresistanceandinductance of a circular cylinder[J].Journal of Southeast Guizhou Normal CollegeforNationalities,2005,25(16):15-18.
[10]程述一,律方成.基于暂态对地电压和超声阵列信号的变压器局放定位方法[J].电工技术学报,2012,27(4):255-262.CHENG Shuyi,LYU Fangcheng.Based on the TEV and ultrasonic array signal of transformer PD position[J].Transactions of China Electrotechnical Society,2012,27(4):255-262.
[11]张小林.信号传输线趋肤效应的分析[D].西安:西安电子科技大学,2009.ZHANG Xiaolin.Analysis of skin effect of signal transmission line[J].Xi'an:Xi'an Electronic and Science University,2009.
[12]任明,彭华东,陈晓清.采用暂态对地电压法综合检测开关柜局部放电[J].高电压技术,2010,36(10):35-47.REN Ming,PENG Huadong,CHEN Xiaoqing.Partial discharge of switch cabinet was detected by transient voltage method[J].High Voltage Engineering.2010,36(10):35-47.
[13]刘强.开关柜结构对局部放电电磁波传播特性及时延算法的影响分析[D].重庆:重庆大学,2013.LIU Qiang.Analysis of the influence of switch cabinet structure on the propagation characteristics of partial discharge electromagnetic wave and time delay algorithm[D].Chongqing:Chongqing University,2013.
[14]王有元,刘强,陆国俊,等.开关柜结构对超高频电磁波传播特性的影响分析[J].电工技术学报,2013,28(11):293-299.WANG Youyuan,LIU Qiang,LU Guojun,et al.Propagation characteristics of ultra-high frequency electromagnetic wave influenced by the switchgear structure[J].Transactions of China Electrotechnical Society,2013,28(11):293-299.
[15]王有元,李寅伟,熊俊.开关柜局部放电暂态对地电压传播特性的仿真分析[J].高电压技术,2011,37(7):1683-1688.WANG Youyuan,LI Yanwei,XIONG Jun.Simulation of transient earth voltages aroused by partial discharge in switchgears[J].High Voltage Engineering,2011,37(7):1683-1688.
[16]陈庆祺,张伟平,刘勤锋.开关柜局部放暂态对地电压的分布特性研究[J].高压电器,2012,10(48):88-93.CHEN Qingqi,ZHANG Weiping,LIU Qinfeng.Study on PD transient voltage distribution characteristics of switchgear[J].High Voltage Apparatus,2012,10(48):88-93.
[17]林俊浩.开关柜局放的超声波及地电波监测技术研究[D].广州:华南理工大学,2012.LIN Junhao.Study on ultrasonic and TEV testing technology of switchgear PD[D].Guangzhou:South China University of Technology,2012.
[18]任明,董明,任重,等.地电波方法在金属封闭式开关柜放电故障诊断中的应用[J].高电压技术,2011,37(4):2672-2679.REN Ming,DONG Ming,REN Zhong,et al.Discharge diagnosis of metal-enclosed switchgear by using TEV method[J].High Voltage Engineering,2011,37(4):2672-267.
[19]余英,李锐鹏,黄超,等.基于时域有限差分法的开关柜表面TEV分布特性的研究[J].绝缘材料,2015,48(4):45-51.YU Ying,LI Ruipeng,HUANG Chao,et al.Study on TEV distribution characteristic of switchgear surface based on finite-difference time-domain method[J].Insulating Materials,2015,48(4):45-51.
[2]关永刚,钱家骊.射频法在高压开关柜局放监测中的应用研究[J].高压电器,2001,37(5):1-3.GUAN Yonggang,QIAN Jiali.Practical study of radio frequency signal used in on-line PD monitoring of HVswitchboard[J].High Voltage Apparatus,2001,37(5):1-3.
[3]蒙恩,徐文,黄海龙.高压开关柜局部放电在线监测研究[J].设计与分析,2014(21):124-126.MENG En,XU Wen,HUANG Hailong.Study on on-line PD monitoring of HV switchboard[J].Design and Analysis,2014(21):124-126.
[4]曾雄杰,江健武.TEV和UHF在10 kV开关柜带电检测中的应用[J].高压电器,2012,48(1):41-47.ZENG Xiongjie,JIANG Jianwu.TEV and UHF application in 10 kV switchgear electrical detection[J].High Voltage Apparatus,2012,48(1):41-47.
[5]刘云鹏,王娟.高压开关柜局部放电UHF在线检测系统的研制[J].高压电器,2009,45(1):15-17.LIU Yunpeng,WANG Juan.The development of the highvoltage switchgear on-line partial discharge UHF detection system[J].High Voltage Apparatus,2009,45(1):15-17.
[6]YAO M.The application of temporary earth voltage(tev)measurement in the online monitoring of the partial discharge of HV switch cabinet[J].Electricity Distribution.2010,45(1):134-138.
[7]ADMANE,M,SONNE M,ZHANG,Q.Simulation of Electric transmission lines with skin effect based on a reduced order differential model,reliability in electromagnetic systems[J].Colloquium on IET,2000,36(8):169-174.
[8]陈水明,许菁,何金良.特快速暂态过电压及其对主变的影响[J].清华大学学报,2005,45(4):573-576.CHEN Shuiming,XU Jing,HE Jinliang.Very fast transient over-voltages and their effects on power transformers[J].Journal of Tsinghua University,2005,45(4):573-576.
[9]粟琼.趋肤效应对圆柱导线电阻和电感的影响[J].黔东南民族师范高等专科学校学报,2005,25(16):15-18.LIQiong.Effectofskineffectontheresistanceandinductance of a circular cylinder[J].Journal of Southeast Guizhou Normal CollegeforNationalities,2005,25(16):15-18.
[10]程述一,律方成.基于暂态对地电压和超声阵列信号的变压器局放定位方法[J].电工技术学报,2012,27(4):255-262.CHENG Shuyi,LYU Fangcheng.Based on the TEV and ultrasonic array signal of transformer PD position[J].Transactions of China Electrotechnical Society,2012,27(4):255-262.
[11]张小林.信号传输线趋肤效应的分析[D].西安:西安电子科技大学,2009.ZHANG Xiaolin.Analysis of skin effect of signal transmission line[J].Xi'an:Xi'an Electronic and Science University,2009.
[12]任明,彭华东,陈晓清.采用暂态对地电压法综合检测开关柜局部放电[J].高电压技术,2010,36(10):35-47.REN Ming,PENG Huadong,CHEN Xiaoqing.Partial discharge of switch cabinet was detected by transient voltage method[J].High Voltage Engineering.2010,36(10):35-47.
[13]刘强.开关柜结构对局部放电电磁波传播特性及时延算法的影响分析[D].重庆:重庆大学,2013.LIU Qiang.Analysis of the influence of switch cabinet structure on the propagation characteristics of partial discharge electromagnetic wave and time delay algorithm[D].Chongqing:Chongqing University,2013.
[14]王有元,刘强,陆国俊,等.开关柜结构对超高频电磁波传播特性的影响分析[J].电工技术学报,2013,28(11):293-299.WANG Youyuan,LIU Qiang,LU Guojun,et al.Propagation characteristics of ultra-high frequency electromagnetic wave influenced by the switchgear structure[J].Transactions of China Electrotechnical Society,2013,28(11):293-299.
[15]王有元,李寅伟,熊俊.开关柜局部放电暂态对地电压传播特性的仿真分析[J].高电压技术,2011,37(7):1683-1688.WANG Youyuan,LI Yanwei,XIONG Jun.Simulation of transient earth voltages aroused by partial discharge in switchgears[J].High Voltage Engineering,2011,37(7):1683-1688.
[16]陈庆祺,张伟平,刘勤锋.开关柜局部放暂态对地电压的分布特性研究[J].高压电器,2012,10(48):88-93.CHEN Qingqi,ZHANG Weiping,LIU Qinfeng.Study on PD transient voltage distribution characteristics of switchgear[J].High Voltage Apparatus,2012,10(48):88-93.
[17]林俊浩.开关柜局放的超声波及地电波监测技术研究[D].广州:华南理工大学,2012.LIN Junhao.Study on ultrasonic and TEV testing technology of switchgear PD[D].Guangzhou:South China University of Technology,2012.
[18]任明,董明,任重,等.地电波方法在金属封闭式开关柜放电故障诊断中的应用[J].高电压技术,2011,37(4):2672-2679.REN Ming,DONG Ming,REN Zhong,et al.Discharge diagnosis of metal-enclosed switchgear by using TEV method[J].High Voltage Engineering,2011,37(4):2672-267.
[19]余英,李锐鹏,黄超,等.基于时域有限差分法的开关柜表面TEV分布特性的研究[J].绝缘材料,2015,48(4):45-51.YU Ying,LI Ruipeng,HUANG Chao,et al.Study on TEV distribution characteristic of switchgear surface based on finite-difference time-domain method[J].Insulating Materials,2015,48(4):45-51.