基于Labview的电容型绝缘设备在线监测方法

Capacitive Insulating Equipment On-line Monitoring Method Based on LabVIEW

由于介质损耗角正切值(tgδ)是反映电容型绝缘设备的重要参数,实际测量计算时很容易因误差而淹没真实值的问题,提出了基于小波变换和Labview相融合的绝缘设备在线监测方法,利用小波变换优良的时频分析工具提取介损的真实值,通过Labview实现对绝缘设备的实时监测,仿真实验结果表明,该方法可提高绝缘监测设备的可信度,使电气设备由定期检修过渡到状态检修成为可能。

The Dielectric loss angle tangent （tgδ） is the important parameter reflect the capacitive insulating equipment, its real value is easy to be covered because of the error on the practical measurement. It shares the capacitive insulating equipment on line monitor method based on wavelet transform and LahVIEW. Via the excellent time-frequency analysis tools of wavelet transform, we pick-up the real value of dielectric loss angle. We get the on line monitor to the insulating equipment by LabVIEW. Emulation result indicate that the method can enhance the reliability of the insulating equipment and make the electric equipment from periodical inspection to state inspection possible.