为了分析油纸绝缘系统的介电频谱与微水含量、温度之间的关系,在实验室搭建了频域介电谱法的测试平台.根据油纸绝缘系统的Debye弛豫模型,推导出了复电容实部与虚部的计算公式,并利用最小二乘法对测试数据进行曲线拟合,得到弛豫模型中的参数值,找出参数值的变化规律,并根据其来评估变压器的绝缘状况.结果表明:油纸复合绝缘系统复介电常数的实部和虚部都随温度和微水含量的增大而增大;温度和微水会影响等效模型中的参数,将弛豫参数的变化规律应用于变压器的状态评估有一定的可行性.
参考文献
| [1] | Ekanayake Chandima;Gubanski S M et al.Freqency Re-sponse of Oil Impregnated Pressboard and Paper Samples for Estimating Moisture in Transformer Insulation[J].IEEE Transactions on Power Delivery,2006,21(03):1309-1317. |
| [2] | 刘君,吴广宁,周利军,闵英杰.变压器油纸绝缘频率响应特性影响因素[J].西南交通大学学报,2011(02):282-286,293. |
| [3] | Zaengl W S .Application of Dielectric Spectroscopy in Time and Frequency Domain for HV Power Equipment[J].IEEE Electrical Insulation Magazine,2003,6(19):9-22. |
| [4] | Fofana, I.;Hemmatjou, H.;Meghnefi, F.;Farzaneh, M.;Setayeshmehr, A.;Borsi, H.;Gockenbach, E. .On the frequency domain dielectric response of oil-paper insulation at low temperatures[J].IEEE transactions on dielectrics and electrical insulation: A publication of the IEEE Dielectrics and Electrical Insulation Society,2010(3):799-807. |
| [5] | Blennow J;Ekanayake C;Walczak K et al.Field Experi-ment with Measurement of Dielectric Response in Frequen-cy Domain for Power Transformer Diagnostics[J].IEEE Transactions on Dielectrics and Electrical Insulation,2006,21(02):681-688. |
| [6] | Walter S. Zaengl .Dielectric spectroscopy in time and frequency domain for HV power equipment, Part I: Theoretical considerations[J].IEEE Electrical Insulation Magazine,2003(5):5-19. |
| [7] | 廖瑞金,郝建,杨丽君,梁帅伟,马志钦.变压器油纸绝缘频域介电谱特性的仿真与实验研究[J].中国电机工程学报,2010(22):113-119. |
| [8] | Yew J H;Saha T K;Thomas A J.Impact of Temperature on the Frequency Domain Dielectric Spectroscpopy for Diag-nosis of Power Transformer Insulation[A].Montreal,Canada,2006 |
| [9] | Gafvert U;Frimpong G;Fuhr J.Modeling of Dielectric Measurement on Power Transforms[A].CIGRE,Paris,France,1998:15-103. |
| [10] | Tapan K. Saha;Prithwiraj Purkait;Frank Muller .Deriving an Equivalent Circuit of Transformers Insulation for Understanding the Dielectric Response Measurements[J].IEEE Transactions on Power Delivery,2005(1):149-157. |
| [11] | 孙目珍.电介质物理基础[M].广州:华南理工大学出版社,2000:115-127. |
| [12] | 廖瑞金,冯运,杨丽君,向彬,刘刚.油纸绝缘老化特征产物生成速率研究[J].中国电机工程学报,2008(10):142-147. |
| [13] | 殷之文.电介质物理[M].北京:科学出版社,2003:49-64. |
| [14] | 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. |
| [15] | 吴广宁.电气设备状态监测的理论与实践[M].北京:清华大学出版社,2006:26-28. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%