论文部分内容阅读
测量局部放电是判断高压电力设备绝缘性能的重要手段之一，对预防绝缘故障有很大意义．在屏蔽室中可以检测出极微弱的放电，而在设备运行现场．强烈的外部干扰．特别是如载波通信等引起的周期性干扰信号，使得局部放电的在线监测难以或甚至不可能实现．采用自适应数字信号处理技术，设计了一种自适应数字滤波系统．由于具有自适应功能，故可以实现最优化滤波效果．使得输出信号中各种周期性干扰降至最小．而保持局部放电信号不受畸变．实验室和现场试验表明，这种数字系统能有效抑制现场监测局部放电时的周期性干扰，对开展高压电力设备局部放电在线监测有重要意义．
Measuring partial discharge is one of the important means to judge the insulation performance of high-voltage power equipment. It is of great significance to prevent insulation failure. In the shielded room can detect very weak discharge, and in the equipment operation site. Strong external interference. Especially, periodic interference signals such as carrier wave communication make the online monitoring of partial discharge difficult or even impossible. Using adaptive digital signal processing technology, an adaptive digital filtering system is designed. Due to its adaptive function, it is possible to optimize the filtering effect. So that the output signal in a variety of periodic interference to a minimum. While maintaining partial discharge signal from distortion. Laboratory and field tests show that this digital system can effectively restrain the periodic disturbance in the field monitoring of partial discharge, and is of great significance for on-line partial discharge monitoring of high voltage power equipment.