为研究变压器油老化对油纸绝缘频域介电谱的影响，以便准确地评估变压器油纸绝缘老化状态，对变压器油进行加速热老化，获得3组不同老化程度的变压器油试样。采用3组油样分别对新绝缘纸进行充分浸渍，得到3组油老化程度不同的油浸纸试样。对每组试样进行频域介电特性测量，获得油浸纸试样介电参数的频域介电谱，研究油老化对变压器油纸绝缘频域介电特性的影响。结果表明：油老化严重时，油纸绝缘的复电容实部（C′）增大，虚部（C″）和介质损耗因数（tanδ）在较低频率范围受变压器油老化的影响显著，且随着油老化的加重而增大，而在较高频率范围的影响较小。
To investigate the effect of age d oil on the frequency domain dielectric spectra of oil-paper in-sulation and accurately evaluate the transformer oil-paper insulation condition, we conducted accelerated thermal ageing experiment on transformer oil, and three different aged states transformer oil samples were obtained. Then the different aged states oils were used to impregnate new cellulose papers respec-tively and three oil-impregnated paper samples were prepared. The frequency domain dielectric characteris-tics of the samples were measured, and the frequency domain spectrum (FDS) was acquired. The results show that when the oil is aged seriously, the real capacitance C′ of oil-impregnated paper increases, and the imaginary capacitance C″ and tanδ are significantly affected by oil aged states in low frequency, and the impact is become larger with the increase of aged state of oil, while the impact in high frequency is small.
参考文献
| [1] | DL/T 1094-2008.电力变压器用绝缘油选用指南[S].北京:中国电力出版社,2008. |
| [2] | Ali M;Eley C;Emsley A M et al.Measuring and Under-standing the Ageing of Kraft Insulating Paper in Power Transformers[J].IEEE ELECTRICAL INSULATION MAGAZINE,1996,12(3):28-34. |
| [3] | 郝建,廖瑞金,杨丽君,马志钦.应用频域介电谱法的变压器油纸绝缘老化状态评估[J].电网技术,2011(07):187-193. |
| [4] | Zaengl W S .Dielectric Spectroscopy in Time and Frequen-cy Domain for HV Power Equipment,Part I:Theoretical Considerations[J].IEEE ELECTRICAL INSULATION MAGAZINE,2003,19(5):9-22. |
| [5] | 陈名铭,韦国,刘君,赵赢峰,周利军,吴广宁,朱毅刚,张云.温度和水分对变压器油纸绝缘系统频域介电谱特性的影响[J].绝缘材料,2012(01):57-61. |
| [6] | Gubanski S M;Boss P;Csepes G et al.Dielectric Re-sponse Methods for Diagnostics of Power Transformers[J].IEEE ELECTRICAL INSULATION MAGAZINE,2003,19(3):12-18. |
| [7] | 吕玮,吴广宁,周利军,刘君,王韬.基于频率响应油纸绝缘系统微水状态研究[J].绝缘材料,2011(02):67-70. |
| [8] | Ekanayake C;Gubanski S M;Graczkowski A et al.Fre-quency Response of Oil Impregnated Pressboard and Paper Samples for Estimating Moisture in Transformer Insulation[J].IEEE Transactions on Power Delivery,2006,21(3):1309-1317. |
| [9] | 王世强,魏建林,杨双锁,董明,张冠军,刘孝为.油纸绝缘加速热老化的频域介电谱特性[J].中国电机工程学报,2010(34):125-131. |
| [10] | Saha T K;Purkait P .Investigations of Temperature Effects on the Dielectric Response Measurements of Transformer Oil-paper Insulation System[J].IEEE Transactions on Pow-er Delivery,2008,23(1):252-260. |
| [11] | 白吉昌,彭永洪,李永军,马强,王林,周利军.油隙对变压器油纸绝缘频率响应特性的影响规律[J].绝缘材料,2014(05):116-120. |
| [12] | 杨丽君,廖瑞金,孙会刚,孙才新,李剑.油纸绝缘热老化特性及生成物的对比分析[J].中国电机工程学报,2008(22):53-58. |
| [13] | 郝建,廖瑞金,杨丽君,梁帅伟,唐超.变压器油纸绝缘热老化酸类及铜类产物生成规律分析[J].高电压技术,2010(09):2160-2166. |
| [14] | Jonscher A K.Dielectric Relaxation in Solids[M].London:Chelsea Dielectrics Press,1996 |
| [15] | 张良莹.电介质物理[M].西安:西安交通大学出版社,1991 |
| [16] | 金维芳.电介质物理学[M].北京:机械工业出版社,1997 |
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