采用回复电压曲线分解法的变压器等效电路研究
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摘要
针对基于回复电压法的等效电路支路数难以判定的问题,利用回复电压数学模型,分析了回复电压数学表达式与支路参数的关系,提出了回复电压分解法。分离出各极化支路所代表的回复电压子曲线,从而判定等效电路的支路数。通过实例验证表明,利用回复电压分解法能够准确判定等效电路的极化支路数,能更准确地反映变压器绝缘老化状况,且变压器绝缘老化越严重,其回复电压子曲线个数和等效电路的极化支路数越多。
According to the branch number of the equivalent circuit difficult to be determined, this paper uses the mathematical model of return voltage, and analyses the relationship of the recovery voltage's mathematical expressions between branch's parameters. Then it presents decomposition method of the return voltage for separating each sub curve of return voltage which polarization branch represented, thus determines the number of the equivalent circuit's branches.It shows that the number of polarization branches of the equivalent circuit can be determined accurately and the aging condition of the transformer insulation is reflected more accurately by decomposing return voltage curve. Moreover, the more serious of the transformer insulation is, the more numbers of return voltage subcurve and polarization branches of the equivalent circuit are.
According to the branch number of the equivalent circuit difficult to be determined, this paper uses the mathematical model of return voltage, and analyses the relationship of the recovery voltage's mathematical expressions between branch's parameters. Then it presents decomposition method of the return voltage for separating each sub curve of return voltage which polarization branch represented, thus determines the number of the equivalent circuit's branches.It shows that the number of polarization branches of the equivalent circuit can be determined accurately and the aging condition of the transformer insulation is reflected more accurately by decomposing return voltage curve. Moreover, the more serious of the transformer insulation is, the more numbers of return voltage subcurve and polarization branches of the equivalent circuit are.
引文
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[13]江修波,黄彦婕,赖祥生.改进蚁群算法及其在变压器绝缘介质响应电路参数辨识中的应用[J].高电压技术,2011,37(8):1982-1988.JIANG Xiubo,HUANG Yanjie,LAI Xiangsheng.Improved ant colony algorithm and its application in parameter identification for dielectric response equivalent circuit of transformer[J].High Voltage Engineering,2011,37(8):1982-1988.
[14]林智勇,蔡金锭.基于回复电压特征量的油纸绝缘老化诊断[J].电子测量与仪器学报,2015,29(11):1669-1676.LIN Zhiyong,CAI Jinding.Aging diagnosis of oil-paper insulation based on the return voltage characteristics[J].Journal of Electronic Measurement and Instrumentation,2015,29(11):1669-1676.
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[16]甘德刚,青晨唯,刘凡,等.基于最小二乘法的变压器油中微水含量在线监测方法[J].高压电器,2012,48(1):48-52,57.GAN Degang,QING Chenwei,LIU Fan,et a1.Study on the on-line monitoring of moisture content in power transformer oil using least square method[J].High Voltage Apparatus,2012,48(1):48-52,57.
[17]魏云冰,王东晖,韩立峰,等.一种基于MIA的油浸式变压器放电性故障定位新方法[J].电力系统保护与控制,2015,43(21):41-47.WEI Yunbing,WANG Donghui,HAN Lifeng,et al.Anovel method for discharging fault diagnosis and location of oil-immersed power transformers based on MIA[J].Power System Protection and Control,2015,43(21):41-47.
[18]郭洪英.基于回复电压极化谱小波包变换的变压器绝缘老化诊断方法[J].电力系统保护与控制,2016,44(24):170-175.GUO Hongying.Diagnostic method of transformer insulation aging based on the recovery voltage polarization spectrum’wavelet packet transform[J].Power System Protection and Control,2016,44(24):170-175.
[19]王林,周利军,李先浪,等.应用极化/去极化电流法分析油纸绝缘微水扩散暂态过程[J].高电压技术,2013,39(2):354-359.WANG Lin,ZHOU Lijun,LI Xianlang,et al.Analysis of transient moisture diffusion in oil-paper insulation using polarization and depolarization current method[J].High Voltage Engineering,2013,39(2):354-359.
[20]贺德华,蔡金锭,蔡嘉.基于弛豫电量的变压器油纸绝缘老化评估[J].仪器仪表学报,2017,38(5):1079-1085.HE Dehua,CAI Jinding,CAI Jia.Aging evaluation of transformer oil-paper insulation based on quantity of relaxation charge[J].Chinese Journal of Scientific Instrument,2017,38(5):1079-1085.
[2]金贵阳,杨克己,戴永军,等.智能配电变压器的串变调压和基于漏磁的绝缘故障检测技术[J].电力系统保护与控制,2017,45(5):103-108.JIN Guiyang,YANG Keji,DAI Yongjun,et al.Voltage regulation and insulation fault detection technology of intelligent distribution transformer[J].Power System Protection and Control,2017,45(5):103-108.
[3]张琳,马宏忠,姜宁,等.基于奇异谱熵和支持向量机的变压器绕组松动识别及定位[J].电力系统保护与控制,2017,45(18):69-75.ZHANG Lin,MA Hongzhong,JIANG Ning,et al.Recognition and location of transformer winding looseness based on singular value spectrum entropy and SVM[J].Power System Protection and Control,2017,45(18):69-75.
[4]马志钦,廖瑞金,郝建,等.温度对油纸绝缘极化去极化电流的影响[J].电工技术学报,2014,29(4):290-297.MA Zhiqin,LIAO Ruijin,HAO Jian,et al.Influence of temperature on polarization and depolarization current of oil-paper insulation[J].Transactions of China Electrotechnical Society,2014,29(4):290-297.
[5]SAMARASINGHE W,KUMARA J,FERNANDO M,et al.Aging assessment of transformer pressboard insulation by micro-strip ring resonator at GHz frequencies[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(3):1923-1930.
[6]SAHA T K,PURKAIT P,MTILLER F.Deriving an equivalent circuit of transformers insulation for understanding the dielectric response measurements[J].IEEE Transactions on Power Delivery,2005,20(1):149-157.
[7]石鑫,朱永利,萨初日拉,等.基于深度信念网络的电力变压器故障分类建模[J].电力系统保护与控制,2016,44(1):71-76.SHI Xin,ZHU Yongli,SA Churila,et al.Power transformer fault classifying model based on deep belief network[J].Power System Protection and Control,2016,44(1):71-76.
[8]XU S Z,MIDDLETON R,FETHERTON F,et al.Acomparison of Return voltage measurement and frequency domain spectroscopy test on high voltage insulation[C]//Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials,IEEE,June 1-5,2003,Nagoya,Japan:351-355.
[9]许渊,刘有为,王文焕,等.大型电力变压器油纸绝缘含水量的介质响应诊断技术[J].中国电机工程学报,2012,32(33):133-140.XU Yuan,LIU Youwei,WANG Wenhuan,et al.Moisture content analysis of oil-paper insulation for large power transformers using dielectric response methods[J].Proceedings of the CSEE,2012,32(33):133-140.
[10]祝顺才,蔡金锭.基于模糊-灰色聚类的油纸绝缘状态综合诊断[J].仪器仪表学报,2017,38(3):718-725.ZHU Shuncai,CAI Jinding.Comprehensive diagnosis of oil-paper insulation status based on fuzzy gray clustering[J].Chinese Journal of Scientific Instrument,2017,38(3):718-725.
[11]YU X Z,BIRLASEKARAN S.Study of recovery voltage mechanism[C]//Proceedings of 6th International Conference on Properties and Application of Dielectric Materials,June 21-26,2000,Xi’an,China:935-938.
[12]XU S Z,MIDDLETON R,FETHERTON F,et al.Acomparison of Return voltage measurement and frequency domain spectroscopy test on high voltage Insulation[C]//Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials,June 1-5,2003,Nagoya,Japan:351-355.
[13]江修波,黄彦婕,赖祥生.改进蚁群算法及其在变压器绝缘介质响应电路参数辨识中的应用[J].高电压技术,2011,37(8):1982-1988.JIANG Xiubo,HUANG Yanjie,LAI Xiangsheng.Improved ant colony algorithm and its application in parameter identification for dielectric response equivalent circuit of transformer[J].High Voltage Engineering,2011,37(8):1982-1988.
[14]林智勇,蔡金锭.基于回复电压特征量的油纸绝缘老化诊断[J].电子测量与仪器学报,2015,29(11):1669-1676.LIN Zhiyong,CAI Jinding.Aging diagnosis of oil-paper insulation based on the return voltage characteristics[J].Journal of Electronic Measurement and Instrumentation,2015,29(11):1669-1676.
[15]谢松,邹阳,蔡金锭.基于模糊粗糙集的变压器油纸绝缘状态评估[J].仪器仪表学报,2017,38(1):190-197.XIE Song,ZOU Yang,CAI Jinding.Assessment of transformer oil-paper insulation status with fuzzy rough set[J].Chinese Journal of Scientific Instrument,2017,38(1):190-197.
[16]甘德刚,青晨唯,刘凡,等.基于最小二乘法的变压器油中微水含量在线监测方法[J].高压电器,2012,48(1):48-52,57.GAN Degang,QING Chenwei,LIU Fan,et a1.Study on the on-line monitoring of moisture content in power transformer oil using least square method[J].High Voltage Apparatus,2012,48(1):48-52,57.
[17]魏云冰,王东晖,韩立峰,等.一种基于MIA的油浸式变压器放电性故障定位新方法[J].电力系统保护与控制,2015,43(21):41-47.WEI Yunbing,WANG Donghui,HAN Lifeng,et al.Anovel method for discharging fault diagnosis and location of oil-immersed power transformers based on MIA[J].Power System Protection and Control,2015,43(21):41-47.
[18]郭洪英.基于回复电压极化谱小波包变换的变压器绝缘老化诊断方法[J].电力系统保护与控制,2016,44(24):170-175.GUO Hongying.Diagnostic method of transformer insulation aging based on the recovery voltage polarization spectrum’wavelet packet transform[J].Power System Protection and Control,2016,44(24):170-175.
[19]王林,周利军,李先浪,等.应用极化/去极化电流法分析油纸绝缘微水扩散暂态过程[J].高电压技术,2013,39(2):354-359.WANG Lin,ZHOU Lijun,LI Xianlang,et al.Analysis of transient moisture diffusion in oil-paper insulation using polarization and depolarization current method[J].High Voltage Engineering,2013,39(2):354-359.
[20]贺德华,蔡金锭,蔡嘉.基于弛豫电量的变压器油纸绝缘老化评估[J].仪器仪表学报,2017,38(5):1079-1085.HE Dehua,CAI Jinding,CAI Jia.Aging evaluation of transformer oil-paper insulation based on quantity of relaxation charge[J].Chinese Journal of Scientific Instrument,2017,38(5):1079-1085.