基于改進(jìn)公垂線法的變壓器局放超聲定位研究
王飛龍
（內(nèi)蒙古電力(集團(tuán))有限責(zé)任公司包頭供電局，內(nèi)蒙古 包頭 014030）
摘 要：方向角和俯仰角確定后，定位誤差與傳感器到變壓器內(nèi)部局放源之間的距離成正相關(guān)性。提出了一種改進(jìn)的測向公垂線中點法，該方法通過模擬實驗求得各傳感器感應(yīng)到的超聲信號情況隨局放源與傳感器之間距離的變化曲線，測得傳感器感應(yīng)到的超聲幅值，從而推算局放源與傳感器之間的空間距離，并認(rèn)為局放源在測向線公垂線上，而且局放源距測向線的距離與局放源到傳感器之間的距離成正比。模擬變壓器局放實驗證實了該方法可以在測向線公垂線中點法的基礎(chǔ)上進(jìn)一步提高定位精度。
關(guān)鍵詞：傳感器；改進(jìn)測向線公垂線中點法；變化曲線；定位；距離
中圖分類號：TM41；TM930.12 文獻(xiàn)標(biāo)識碼：B 文章編號：1007-3175(2020)02-0054-04
Research on Partial Discharge Ultrasonic Location in Transformer Based on Improved Common Perpendicular Line
WANG Fei-long
（Baotou Power Supply Bureau, Inner Mongolia Power (Group) Co., Ltd, Baotou 014030, China）
Abstract: After the direction angle and the pitch angle are determined, the positioning error is positively correlated with the distance between the sensor and the partial discharge (PD) source. This paper proposed a kind of improved direction-finding common perpendicular midpoint method, obtaining the curve of the ultrasonic signal induced by each sensor changing with the distance between the PD source and the sensor by simulation experiment and measuring the sensor ultrasonic amplitude, so as to calculate the spatial distance between the PD source and the sensor. It is considered that the PD source is on the direction-finding common perpendicular line and the distance between the PD source and the direction-finding line is proportional to the distance between the PD source and the sensor. The simulation of transformers PD experiments verifies that this method could further improve the positioning accuracy on the basis of direction-finding common perpendicular midpoint method.
Key words: sensor; improved direction-finding common perpendicular midpoint method; variation curve; location; distance
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