用统计法提高超声局部放电定位的准确性

Improving the Accuracy of Ultrasonic Location of Partial Discharge with Statistical Method

针对变压器的局部放电定位方法,笔者先从理论上分析电气定位法、电—声定位法和统计法的原理,并以某1台变压器的局部放电为实例,通过采用电气定位法和电—声定位法的联合检测,并采用统计的方法,一方面节省了局部放电定位的时间,另一方面减小了空间位置误差,提高了超声局部放电定位的准确性,从而验证了统计法在局部放电定位的重要性。

The principles of the electric location method, the electric-ultrasonic location method and the statistical method for partial discharge are analyzed theoretically. Then taking partial discharge location in a transformer for example, the combination of the electric location method, the electric-ultrasonic location method and the statistical method is utilized to save location time and reduce spatial location error, and hence to improve the accuracy of ultrasonic location of partial discharge. The result verifies the importance of the statistical method in partial discharge location.