基于虚拟仪器的变压器套管介质损耗因数在线检测的研究

On-line Detection of Dielectric Loss Tangent of Transformer Bushing Based on Virtual Instrument

介质损耗因数(tanδ)是高压套管等电容型电气设备绝缘状况的重要特性参数,但由于变压器运行环境中存在很多的干扰信号影响了套管的介质损耗因数测量,采用小波去噪的方法,研究了基于虚拟仪器的变压器套管介质损耗因数在线检测。测量结果表明,虚拟测试仪引入小波函数法,具有较高的准确度。

The dielectric loss tangent （tanδ） is an important characteristic parameter of the insulation condition of transformer bushings. A lot of interference signals exist when a transformer operates, which will influence the detection of dielectric loss tangent. The wavelet de-noising method was adopted to eliminate the interference signals; and the on-line detection of the dielectric loss tangent （tanδ） of transformer bushing based on virtual instrument was developed.