基于负极性下局部放电测量的变压器油中气泡发展过程实验研究  

Study of bubble development in transformer oils based on PD measurement in negative point-plane gaps

作　　者：李军浩[1] 司文荣[1] 毕海涛[1] 刘炯[1] 李彦明[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电能新技术》2008年第2期63-67,共5页Advanced Technology of Electrical Engineering and Energy

摘　　要：油中局部放电表现为一系列离散的脉冲序列形式,脉冲序列中的首脉冲是液相中发生电荷注入产生的,随后的脉冲则是由于液相中电荷注入产生的气泡所引发的气泡放电导致。首脉冲与次脉冲的时间间隔代表了气泡形成时间,脉冲序列的持续时间代表了气泡的生长时间。本文采用宽频带局部放电脉冲测量系统和TECHIMP局放仪对25#变压器油中由于电场集中效应引起的局部放电脉冲序列及相位谱图进行了测量,研究了油中气泡生长时间及气泡形成时间同外加电压的关系。Partial discharges, which take place in insulating oils, series of discrete current pulses. The first pulse of pulse bursts is appear in the form of pulse bursts that consist of a due to the initial streamer in the liquid phase, and all subsequent pulses will be the PD pulse responses in the growing bubble. The time interval between the first and second pulses is the formation time of bubble. The whole time of pulse bursts is the existing time of bubble in oil. The pulse burst characteristic and V-Ф Pattern in 25# transformer oil is measured using UWB measuring system and TECHIMP PD detector. The development process of pulse bursts in transformer oil is studied. The development time and formatting time in difference voltage are studied in this paper.

关 键 词：局部放电 油纸绝缘 油中气泡 宽频带测量系统 生长时间 形成时间 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]