阶梯电压下干式空心电抗器匝间绝缘的局放特性  

Characteristics of PD for Dry-type Air-core Reactor in Turn-to-turn Insulation under Step-voltage

作　　者：姚远航 魏新劳[1] 杨胜生 顾哲屹 聂洪岩[1] YAO Yuan-hang;WEI Xin-lao;YANG Sheng-sheng;GU Zhe-yi;NIE Hong-yan(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China;Kunshan Special Transformer Manufacturing Co.Ltd,Kunshan 215312,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080 [2]昆山市特种变压器制造有限公司,江苏昆山215312

出　　处：《哈尔滨理工大学学报》2018年第3期72-78,共7页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51277046)

摘　　要：匝间绝缘击穿是干式空心电抗器匝间绝缘故障的最终表现形式,过电压下的局部放电是引起匝间绝缘损伤的主要因素之一。为研究干式空心电抗器匝间绝缘局部放电随电压变化的发展规律,在局部放电屏蔽室内搭建了试验平台。参照35 k V干式空心电抗器匝间绝缘的工艺制造要求,制作了匝间绝缘局部放电试验模型,采用阶梯升压方式,利用数字式局部放电检测仪采集信号,得出了不同加压持续时间下最大放电量、平均放电量和放电重复频率的变化特征以及二维图谱Hqmax(φ)、Hqn(φ)、Hn(φ)、放电幅值灰度图和放电能量灰度图的信息。Turn-to-turn insulation breakdown is the final expression form of turn-to-turn insulation fault for the dry-type air-core reactor,the partial discharge under over voltage is one of the main factors causing the turn-to-turn insulation damage. In order to study the rule of the partial discharge along with the development of the voltage for the dry-type air-core reactor turn-to-turn insulation,the test platform was constructed in the partial discharge shielding room. This paper references the manufacture process of 35 k V dry-type air-core reactor turn-to-turn insulation,and make the turn-to-turn insulation partial discharge test model,then get the partial discharge signal with the digital partial discharge detector in the way of step-voltage. From the results,the variation characteristics of the maximum discharge,average discharge,discharge repetition frequency,and the two-dimensional phase resolved partial discharge pattern of Hqmax（φ）,Hqn（φ）,Hn（φ）,discharge amplitude grayscale,discharge energy grayscale can be obtained under different step-voltage tests of step-up duration.

关 键 词：干式空心电抗器 匝间绝缘 局部放电 特征参量 阶梯电压 

分 类 号：TM406[电气工程—电器]