高电压技术2017，Vol.43Issue(8)：2592-2598,7.DOI:10.13336/j.1003-6520.hve.20170731020
潮气侵入对油浸纸套管电气特性的影响
Influence of the Ingress of Moisture on Electric Characteristic of Oil-immigrated Paper Bushings
摘要
Abstract
In order to study the electrical characteristics of ingress of moisture on oil-immigrated paper (OIP) bushing,OIP bushing models were made and the moisture conditions were simulated by ultrasonic humidifier.The parameters of moisture in oil,partial discharge,and tanδ were measured after the bushing model damped at different time.It is indicated that the moisture in oil firstly increases and then decreases by the standing time of damped bushing,which is classified by the moisture in oil 20 mg/L as three stages:"low-moisture stage,high-moisture stage and moisture migration to paper stage".All of three stages,the curve of tanδ-U trends to increase.Therefore,the possibility of misjudgment for moisture bushing in the low-moisture stage may be obtained by traditional measurement.For the suspicious moisture bushing,the maximum value of △tanδ under the voltage of 2Um/1.732 (Um is the maximum opreation voltage of the equipment) should be lower than 0.2％ for the high sensitivity of moisture bushing.Therefore,the insulation condition of OIP bushing can be judged by measuring the curve oftanδ-Uand partial discharge so as to find out the moisture bushing earily.关键词
潮气侵入/油浸纸套管/电气特性/介质损耗角正切值/局部放电/水分迁移Key words
ingress of moisture/oil-impregnated paper bushing/electric characteristics/tanδ/partial discharge/moisture migration引用本文复制引用
齐波,戴佺民,卓然,潘齐方,傅明利,李成榕..潮气侵入对油浸纸套管电气特性的影响[J].高电压技术,2017,43(8):2592-2598,7.基金项目
国家自然科学基金(51477052) （51477052）
国家高技术研究发展计划(863计划)(2015AA050204) （863计划）
中国南方电网有限责任公司科技项目(K-KY2014-002).Project supported by National Natural Science Foundation of China (51477052),National High-tech Research and Development Program of China (863 Program) (2015AA050204),Science and Technology Project of China Southern Power Grid Co.,Ltd.(K-KY2014-002). （K-KY2014-002）
