基于微观和统计信息的GIS局部放电定位技术

Partial discharge location technology in GIS based on micro information and statistical information

特高频时差定位法由于对放电脉冲到达时间差的计算精度要求较高,难以在局部放电监测的实际场景中广泛应用。本文提出了一种基于微观信息和统计信息的GIS局部放电定位技术,首先利用放电脉冲的微观信息检定到达时间并修正时间差,然后利用多次定位结果的概率分布确定最终定位结果。现场实验和案例分析表明,该局部放电定位技术能够提高局部放电定位的精度和抗噪声干扰能力,并且无论是单个放电缺陷还是多个放电缺陷,都能够准确定位到放电源的位置。

UHF time difference location method is difficult to be widely used in pd monitoring scenarios because of its high requirement on the calculation accuracy of arrival time difference of discharge pulses.In this paper,a technique of partial discharge location in GIS based on micro-information and statistical information is proposed.Firstly,the micro-information of discharge pulse is used to verify the arrival time and correct the time difference,and then the probability distribution of multiple location results is used to determine the final location result.Field experiments and case studies show that this method can locate the power supply accurately no matter it is a single discharge defect or multiple discharge defects.