基于频域介电谱法的套管受潮状态现场评估

In-situ evaluation of bushing damp condition based on frequency domain dielectric spectroscopy

水分是影响套管绝缘性能的主要因素,频域介电谱法(FDS)由于其测试频带宽,携带信息丰富而在电气设备绝缘状态评估领域广泛应用。为研究基于频域介电谱法的套管受潮状态现场诊断和评估,本文对现场运行的110kV、220kV、500kV主变高压侧套管进行频域介电谱测试,分析了水分和测试频率对频域介电谱测试结果产生的影响,针对频域介电谱的干扰频率对套管受潮状态现场诊断进行研究。

Moisture is the main factor affecting the insulation performance of casing.Frequency domain dielectric spectroscopy is widely used in the field of insulation evaluation of electrical equipment because of its frequency bandwidth and rich information.In order to study the field diagnosis and evaluation of casing damp state based on frequency domain dielectric spectroscopy,frequency domain dielectric spectroscopy of 220kV main transformer high pressure side casing was carried out.The results of water frequency and test frequency were analyzed.The interference frequency of the frequency domain dielectric spectroscopy was studied.