可视局放UHF空间定位系统及时延估计实现

Implementation of Visual Partial Discharging UHF Spatial Positioning System and Time Delay Evaluation

文中介绍的可视局放UHF空间定位系统利用4个位于不同高度云台上的UHF天线阵列,检测局放中的UHF信号,基于时延估计和空间几何解算实现放电信号准确定位,并通过摄像对局放点进行可视化。首先分析了局部放电UHF电磁波的辐射及其定位原理,阐述了可视局放UHF空间定位系统组成,重点研究了结合阀值法和过零点插值的时延估计方法。最后通过测试验证系统的有效性。

The visual partial discharging UHF spatial positioning system uses four UHF antenna array at different heights to detect the UHF signals to locate discharging signals based on the signal delay estimation and space geometric analysis. Also it visualizes the discharging point using camera. Firstly, UHF radiation and electromagnetic of partial discharge and its positioning principle are introduced. Then, the components of visual-able UHF spatial positioning system for partial discharging is introduced. Finally, the delay estimation method based on the threshold method and zero-crossing interpolation point method are studied. Testing results verifies the effectiveness and practicality of the system.