电容性电器设备介质损耗角实时测量方法

The real-time measuring method on dielectric loss angle of electrical capacitive equipment

叙述了用矢量乘法技术在电力设备绝缘在线监测与诊断中的应用。测量系统采用数字合成波形发生器技术、模拟-数字乘法器技术对电力设备绝缘的漏电流进行正交分解,提高了小电流信号的测量分辨率;用以小波变换技术构成的数字滤波器对正交分解后的矢量进行数字滤波以提高系统的抗干扰能力。

The measuring technique of parameters in the performance of equipment insulator based on digital waveform generator technique and digital hardware multiplication operater is introduced in the paper .The leaking current of insulator in high-voltage equipments can be vertically decompounded with the measuring method being based upon digital waveform generator technique and digital hardware multiplication operater in the measurement system . The measuring technique which of the small signal of leaking current and the signal of the loss angle tgo be gained is introduced in detail . The principle chart and the mathematic expression of the measuring method are put forward , and the measurement error is analyzed. The measuring technique is real-time and effective.