基于自激原理的非接触CVT介质损耗测量方法

The Non-contact Method based on Self-excited Principle to Measure Dielectric Loss of CVT

基于自激法原理提出了一种非接触式CVT介损测量方法,通过非接触式测量平台对电压电流波形同步采样,并由无线WIFI模块将所测得电参量传输至PC端,在Lab VIEW软件平台上用谐波分析法进行电压电流信号的处理并计算得出介质损耗参数tanδ。试验证明,该方法可以有效测出CVT各部分电容器的介损值和电容值,同时能够可视化电压电流参量,用于长期监测CVT绝缘状态,在实际的介损测试中可以隔离高压,有较高的安全性和可靠性。

A non-contact method was presented to measure CVT dielectric loss. Synchronous sampling of voltage and current waveforms from CVT are made in non-contact measurement platform by self-excited method. Then the electrical parameters will be transmitted by the wireless WIFI to the PC side. The dielectric loss angle （tan 6 ） can be obtained by analyzing those waves with Harmonic Analysis on LabVIEW software platform. The test shows that this method can effectively measure the various capacitor dielectric loss and capacitance values of CVT. Meanwhile, the electrical parameters can be visualized to monitor the long-term insulating state of CVT by this way. Some actual measurement of dielectric loss has verified the safety and reliability of the method.