牵引变压器绕组改进型频率响应建模与径向变形故障分析
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摘要
以一台QYS-R-(31500+25000)/220牵引变压器为研究对象,提出一种基于集总参数电路的考虑绕组间全电容参数的改进型频率响应模型,通过与实测曲线进行对比,验证了模型正确性;然后对变压器的牵引绕组和高压绕组分别进行了向内的曲翘变形和向外的鼓包变形这2种径向变形故障仿真,重点分析了不同变形故障对电容参数的影响;最后通过对变化的频率响应曲线进行分析。分析结果表明:牵引变压器牵引绕组和高压绕组发生径向变形故障时,特征诊断频带不同,但在各自的特征频带内频响曲线呈现相同的变化规律,即随着故障程度的增加,频率响应曲线向低频方向移动,并且幅值不断增大。
Taking a QYS-R-(31500+25000)/220 traction transformer as the research object,an improved frequency response model based on lumped parameter circuit considering full capacitance parameters of windings is proposed. The correctness of the proposed model is verified by comparing with the measured curves. Then two kinds of radial deformation faults,i.e. inward warpage deformation and outward drum deformation,are respectively simulated for the traction winding and the high voltage winding of transformer. The influence of different deformation faults on capacitance parameters is mainly analyzed. The results show that when the traction winding and high voltage winding have radial deformation faults,their characteristic diagnostic frequency bands are different,but in their respective characteristic frequency bands,the changes of frequency response curves are the same,that is,with the increase of the fault degree,the frequency response curves move towards low frequency,and the amplitude increases.
Taking a QYS-R-(31500+25000)/220 traction transformer as the research object,an improved frequency response model based on lumped parameter circuit considering full capacitance parameters of windings is proposed. The correctness of the proposed model is verified by comparing with the measured curves. Then two kinds of radial deformation faults,i.e. inward warpage deformation and outward drum deformation,are respectively simulated for the traction winding and the high voltage winding of transformer. The influence of different deformation faults on capacitance parameters is mainly analyzed. The results show that when the traction winding and high voltage winding have radial deformation faults,their characteristic diagnostic frequency bands are different,but in their respective characteristic frequency bands,the changes of frequency response curves are the same,that is,with the increase of the fault degree,the frequency response curves move towards low frequency,and the amplitude increases.
引文
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[16] 张嘉祥.变压器线圈波过程[M].北京:水利水电出版社,1982:252-268.
[2] 李莉,朱永利,宋亚奇.变压器绕组多故障条件下的振动信号特征提取[J].电力自动化设备,2014,34(8):140-146.LI Li,ZHU Yongli,SONG Yaqi.Feature extraction for vibration signal of transformer winding with multiple faults[J].Electric Power Automation Equipment,2014,34(8):140-146.
[3] 邹林,廖一帆,罗兵,等.基于有限元法探究电力变压器绕组变形频率响应的仿真研究[J].电力自动化设备,2017,37(1):204-211.ZOU Lin,LIAO Yifan,LUO Bing,et al.Simulative research on frequency response to winding deformation of power transformer based on finite element method[J].Electric Power Automation Equipment,2017,37(1):204-211.
[4] 张博,李岩.多次冲击条件下的大型变压器绕组辐向失稳[J].电工技术学报,2017,32(2):71-76.ZHANG Bo,LI Yan.Radial stability of large transformer windings under multiple inrush conditions[J].Transactions of China Electrotechnical Society,2017,32(2):71-76.
[5] 郑含博,翟进乾,李哲,等.大型电力变压器内绕组辐向抗短路能力评估[J].电力系统保护与控制,2016,44(22):154-158.ZHENG Hanbo,ZHAI Jinqian,LI Zhe,et al.An assessment of ability to withstand radial short circuit of large power transformer inner windings[J].Power System Protection and Control,2016,44(22):154-158.
[6] MITCHELL S D,WELSH J S.Modeling power transformers to support the interpretation of frequency-response analysis[J].IEEE Transactions on Power Delivery,2011,26(4):2705-2717.
[7] HOLDYK A,GUSTAVSEN B,ARANA I,et al.Wideband modeling of power transformers using commercial sFRA equiment[J].IEEE Transactions on Power Delivery,2014,29(3):1446-1453.
[8] 孙翔,何文林,詹江杨,等.电力变压器绕组变形检测与诊断技术的现状与发展[J].高电压技术,2016,42(4):1207-1220.SUN Xiang,HE Wenlin,ZHAN Jiangyang,et al.Current status and development of test and diagnostic technique of transformer winding deformation[J].High Voltage Engineering,2016,42(4):1207-1220.
[9] PHAM D,PHAM T,BORSI H,et al.A new diagnostic method to support standard frequency response analysis assessments for diagnostics of transformer winding mechanical failures[J].IEEE Electrical Insulation Magazine,2014,30(2):34-41.
[10] LIN Huan,ZHANG Ziwei,TANG Wenhu,et al.Equivalent gradient area based fault interpretation for transformer winding using binary morphology[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(3):1947-1956.
[11] LUDWIKOWSKI K,SIODLA K,ZIOMEK W.Investigation of transformer model winding deformation using sweep frequency response analysis[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(6):1957-1961.
[12] ZHANG Ziwei,TANG Wenhu,JI Tianyao,et al.Finite-element mo-deling for analysis of radial deformations within transformer windings[J].IEEE Transactions on Power Delivery,2014,29(5):2297-2305.
[13] YOUSOF M F M,EKANAYAKE C,SAHA T K.Frequency response analysis to investigate deformation of transformer winding[J].IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(4):2359-2367.
[14] HASHEMNIA N,ABU-SIADA A,ISLAM S.Improved power transformer winding fault detection using FRA diagnostics-part 2:radial deformation simulation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(1):564-570.
[15] JAYASINGHE J A S B,WANG Zhongdong,JARMAN P N,et al.Winding movement in power transformers:a comparison of FRA measurement connection methods[J].IEEE Transactions on Dielectrics and Electrical Insulation,2006,13(6):1342-1349.
[16] 张嘉祥.变压器线圈波过程[M].北京:水利水电出版社,1982:252-268.