Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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變壓器鐵芯高阻接地對繞組電容量和介損測試影響分析

來源:電工電氣發布時間:2022-02-28 10:28 瀏覽次數:674

變壓器鐵芯高阻接地對繞組電容量和介損測試影響分析

邱煒,高竣,陳佳,楊紅權,劉彥琴,劉鑫,蔡川,周波,郭超,程鵬
(國網四川省電力公司成都供電公司,四川 成都 610041)
 
    摘 要:針對一起現場變壓器例行試驗中出現電容量和介質損耗 (介損) 數據異常案例,結合測試原理以及變壓器的結構設計,建立等效 RC 電路模型進行仿真分析,研究了變壓器鐵芯高阻接地對變壓器繞組電容量和介損測量影響的規律,并解釋了電容量和介損數據出現異常的原因。研究表明,鐵芯高阻接地時,會引起各繞組現場實測的電容量和介損數據異常,隨著接地電阻值增加,實測電容值略微減少,而介損數據會劇增;鐵芯高阻接地對各繞組現場實測的電容量和介損數據的影響程度還與被試繞組自身真實電容量密切相關,被試繞組自身真實電容量越大,其實測的電容量和介損數據受到鐵芯高阻接地的影響也越大。
    關鍵詞:變壓器;電容量;介質損耗;RC 等效模型;高阻接地
    中圖分類號:TM406     文獻標識碼:B     文章編號:1007-3175(2022)02-0028-05
 
Influence of High-Resistance Grounding of the Core on Capacitance and
Dielectric Loss Test of the Transformer Winding
 
QIU Wei, GAO Jun, CHEN Jia, YANG Hong-quan, LIU Yan-qin, LIU Xin, CAI Chuan, ZHOU Bo, GUO Chao, CHENG Peng
(Chengdu Power Supply Company, State Grid Sichuan Electric Power Company, Chengdu 610041, China)
 
    Abstract: This paper takes an abnormal event of capacitance and dielectric loss data in a routine experiment of an on-site transformer as an example. It used the test principle and the structural design of the transformer to build an equivalent RC circuit model to simulate and analyze the instance. It studied the pattern which the influence of the grounding high-resistance transformer core on transformer windings capacity and dielectric loss measurement. It also explained the abnormal that the capacitance and dielectric loss data. Results showed that the measured capacitance and dielectric loss data became abnormal when the high-resistance iron core was in grounding mode. The capacitance value decreases slightly when the grounding resistance value increases. In this situation, the dielectric loss data rises sharply. The impact of the high-resistance grounding of the core on the measured capacitance and dielectric loss data of each winding is related to the capacitance of the tested winding itself. The influence of the grounding iron core on the measured capacitance and dielectric loss data determined by the capacitance of the tested winding.
    Key words: transformer; capacitance; dielectric loss; RC equivalent model; high-resistance grounding
 
參考文獻
[1] 楊飛豹,高國強,宋臻杰,等. 基于頻域介電譜和多輸出支持向量回歸的變壓器油紙絕緣狀態評估[J]. 高壓電器,2018,54(12) :150-157.
[2] 陳明星,高波,胡廣才,等. 基于時域介電法的變壓器油紙絕緣老化特征參量分析[J] . 高壓電器,2020,56(2) :108-113.
[3] 黃新波,馬玉濤,朱永燦. 基于信息融合和 M-RVM 的變壓器故障診斷方法[J] . 電力自動化設備,2020,40(12) :218-224.
[4] 賀德華,蔡金錠,蔡嘉. 基于時域譜線特征量的變壓器油紙絕緣診斷[J] . 電力自動化設備,2017,37(4) :122-127.
[5] 周利軍,劉偉迪,王東陽,等. 基于頻域介電譜法的油浸式套管受潮狀態評估[J] . 電力自動化設備,2018,38(11) :134-140.
[6] WANG M, VANDERMAAR A, SRIVASTAVA K D.Review of condition assessment of power transformers in service[J].IEEE Electrical Insulation Magazine,2002,18(6) :12-25.
[7] 周利軍,周祥宇,吳振宇,等. 變壓器繞組振蕩波建模及軸向移位故障分析[J] . 電力自動化設備,2021,41(3) :157-163.
[8] 李成祥,夏麒,朱天宇,等. 基于脈沖頻率響應法的變壓器繞組變形帶電檢測儀[J] . 電力自動化設備,2018,38(1) :110-115.
[9] 鄒林,廖一帆,羅兵,等. 基于有限元法探究電力變壓器繞組變形頻率響應的仿真研究[J] . 電力自動化設備,2017,37(1) :204-211.
[10] 彭平,周新軍,由凱. 鐵芯不接地對變壓器繞組介質損耗因素和電容量測量的影響[J] . 湖南電力,2016,36(3) :47-49.
[11] SAHA T K, PURKAIT P, MULLER 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.
[12] HOUHANESSIAN V D, ZAENGL W S.Time domain measurements of dielectric response in oilpaper insulation systems[C]//Conference Record of the 1996 IEEE International Symposium on Electrical Insulation,1996 :47-52.
[13] ZAENGL W S.Dielectric spectroscopy in time and frequency domain for HV power equipment.I.Theoretical considerations[J].IEEE Electrical Insulation Magazine,2003,19(5) :5-19.
[14] FARAHANI M, BORSI H, GOCKENBACH E.Dielectric response studies on insulating system of high voltage rotating machines[J].IEEE Transactions on Dielectrics and Electrical Insulation,2006,13(2) :383-393.

 

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