基于暂态地电压10 kV开关柜局部放电定位研究
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摘要
局部放电会加速高压设备绝缘老化,导致设备故障。局放测量是开关设备状态评价的重要依据,通常结合暂态地电压和超声波检测法对开关柜局放检测,存在易受外界信号干扰和难以定位故障等缺点。为此,从暂态地电压形成的机理出发,对暂态地电压的特点进行分析,提出对可疑高压开关柜实施长时间监测,利用天线屏蔽外界干扰信号,从复杂的信号源中辨识开关柜局部放电信号,通过矩阵探头定位法实现局部放电故障定位。实际工作中成功发现并定位故障点,验证了方法的可行性和准确性。
Partial discharge accelerates insulation aging and leads to insulation failure of high voltage equipment.PD test is an important basis for condition evaluation of switchgear. It is usually combined with transient earth voltage and ultrasonic detection methods to detect partial discharge of switchgear,which is vulnerable to external signal interference and difficult to locate the fault. Therefore,based on the formation mechanism of transient earth voltage,this paper analyzes the characteristics of transient earth voltage and proposes a long-term monitoring method for suspicious HV switchgear. The antenna is used to shield the external interference signal,and the switchgear partial discharge signal is identified from complex signal sources,Finally the fault location of partial discharge can be located by the method of matrix probe. The fault location is found and located in the actual working case,which can verify the method is accurate and feasible.
Partial discharge accelerates insulation aging and leads to insulation failure of high voltage equipment.PD test is an important basis for condition evaluation of switchgear. It is usually combined with transient earth voltage and ultrasonic detection methods to detect partial discharge of switchgear,which is vulnerable to external signal interference and difficult to locate the fault. Therefore,based on the formation mechanism of transient earth voltage,this paper analyzes the characteristics of transient earth voltage and proposes a long-term monitoring method for suspicious HV switchgear. The antenna is used to shield the external interference signal,and the switchgear partial discharge signal is identified from complex signal sources,Finally the fault location of partial discharge can be located by the method of matrix probe. The fault location is found and located in the actual working case,which can verify the method is accurate and feasible.
引文
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[7]邓雨荣,田树军,李锐鹏,等.一种改进的10kV开关柜局部放电TEV检测及定位技术[J].绝缘材料,2014,47(2):93-96.DENG Yurong,TIAN Shujun,LI Ruipeng,et al. An improvedTEV detection and location technique of partial discharge for10 kV switchgear[J]. Insulating Materials, 2014,47(2):93-96.
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[9]冯波,肖代波,李毅,等.暂态对地电压和超声法用于开关柜不同湿度PD检测研究[J].高压电器,2015,51(4):67-77.FENG Bo,XIAO Daibo,LI Yi,et al. Detection of partial dischargein switchgear under different humidity using transient earth voltageand ultrasonic method[J]. High Voltage Apparatus,2015,51(4):67-77.
[10]王流火,吕鸿,吴吉,等.开关柜局部放电检测技术的应用研究[J].高压电器,2014,50(3):62-67.WANG Liuhuo,LU Hong,WU Ji,et al. Application study on de-tection technology of switchgear partial discharge[J]. High VoltageApparatus,2014,50(3):62-67.
[2]吴吉,吕鸿,王流火,等.开关柜局部放电暂态地电波(TEV)传播特性的实验研究[J].高压电器,2014,50(11):115-121.WU Ji,LU Hong,WANG Liuhuo,et al. Experimental study onpropagation of transient earth voltage signals aroused by partial dis-charge in switchgears[J]. High Voltage Apparatus, 2014,50(11):115-121.
[3]王有元,李寅伟,陆国俊,等.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):309-312.WANG Youyuan,LI Yanwei,LU Guojun,et al. Simulation of tran-sient earth voltages aroused by partial discharge in switchgears[J]. High Voltage Engineering,2011,37(7):309-312.
[4]靳键云.开关柜局部放电暂态对地电压检测法的研究[J].山西电力,2011,30(5):10-12.JIN Jianyun. Study of TEV detection on switchgear partial dis-charge[J]. Shanxi Electric Power,2011,30(5):10-12.
[5]王流火,吕鸿,王增彬,等.开关柜局部放电检测定位技术的应用研究[J].广东电力,2014,27(4):91-94.WANG Liuhuo,LU Hong,WANG Zengbin,et al. Study on ap-plication of partial discharge detecting and positioning technologyfor switch cabinet[J]. Guangdong Electric Power,2014,27(4):91-94.
[6]律方成,李海德,王子建,等.基于TEV与超声波的开关柜局部放电检测及定位研究[J].电测与仪表,2013,50(11):73-78.LU Fangcheng,LI Haide,WANG Zijian,et al. Research on partialdischarge detection and location of switchgear based on TEV andultrasonic wave methods[J]. Electrical Measurement&Instrumen-tation,2013,50(11):73-78.
[7]邓雨荣,田树军,李锐鹏,等.一种改进的10kV开关柜局部放电TEV检测及定位技术[J].绝缘材料,2014,47(2):93-96.DENG Yurong,TIAN Shujun,LI Ruipeng,et al. An improvedTEV detection and location technique of partial discharge for10 kV switchgear[J]. Insulating Materials, 2014,47(2):93-96.
[8]任明,彭华东,陈晓清,等.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):2460-2466.REN Ming,PENG Huadong,CHEN Xiaoqing,et al. Comprehen-sive detection of partial discharge in switchgear using TEV[J].High Voltage Engineering,2010,36(10):2460-2466.
[9]冯波,肖代波,李毅,等.暂态对地电压和超声法用于开关柜不同湿度PD检测研究[J].高压电器,2015,51(4):67-77.FENG Bo,XIAO Daibo,LI Yi,et al. Detection of partial dischargein switchgear under different humidity using transient earth voltageand ultrasonic method[J]. High Voltage Apparatus,2015,51(4):67-77.
[10]王流火,吕鸿,吴吉,等.开关柜局部放电检测技术的应用研究[J].高压电器,2014,50(3):62-67.WANG Liuhuo,LU Hong,WU Ji,et al. Application study on de-tection technology of switchgear partial discharge[J]. High VoltageApparatus,2014,50(3):62-67.