多频介电响应测量技术在绝缘材料测试的应用

Application of Multifrequency Dielectric Response Measurement Technology in Insulation Material Testing

针对输电线路寿命评估难题,采用多频介电响应技术测量老化电缆在全频谱下的介质损耗正切值。制作了多根老化电缆试验样品,试验设备采用定制的无噪声电源以降低噪声干扰。测量了多频介电响应设备在低频时的噪声情况,对测量结果中噪声干扰严重区域给出了估计值,并对比分析了60℃和80℃时的电缆介电损耗正切值。

Aiming at the problem of life assessment of transmission lines,the multi-frequency dielectric response techniqueis used to measure the tangent value of dielectric loss of aging cables in full spectrum.A number of aging cable test samples were made.The test equipment used custom-made noise-free power supply to reduce noise interference.At the same time,the noise of multi-frequency dielectric response equipment at low frequency was measured.The estimated values were given in the areas where the measurement results were seriously disturbed by noise,and the tangent values of dielectric loss of cables at 60℃and 80℃were analyzed and compared.