温度对绝缘清洗剂介电性能影响的研究

Effect of Temperature on Quality Loss Factor of Insulating Medium

变压器油与绝缘清洗剂大量应用于电力系统,介质损耗因数作为绝缘介质的一种重要指标,其测量结果会受到温度和频率的影响。试验了温度、电压和频率对变压器油和绝缘清洗剂介质损耗因数的影响,结果表明,变压器油与绝缘清洗剂介质损耗因数tanδ在30℃~90℃范围内随着温度升高而增大,tanδ在频率10^(-4)Hz~10^(3) Hz范围内随频率增大而减小,电极间外加频率越低,温度对tanδ影响越大,表现为温度越高tanδ越大。试验结果对变压器油与绝缘清洗剂的选用和研发具有重要意义。

Pressure oil and insulating cleaner are widely used in power system.As an important index of insulating medium,dielectric loss factor is affected by temperature and frequency.The influence of temperature,voltage and frequency on dielectric loss factors of transformer oil and insulating cleaner is experimented in this paper.The results of tanδshow that dielectric loss factors of transformer oil and insulating cleaner increase with temperature in the range of 30℃~90℃,decrease with frequency in the range of 10^(-4)Hz~10^(3)Hz and between electrodes.The lower the applied frequency is,the greater the influence of temperature on tanδis.The higher the temperature is,the greater the tanδis.The test results are of great significance to the selection and development of transformer oil and insulation cleaner.