高电压技术2018，Vol.44Issue(2)：554-560,7.DOI:10.13336/j.1003-6520.hve.20180131028
三种工况对变压器套管潮气入侵绝缘特性的影响
Influence of Moisture Ingress on the Insulation Characteristic in Oil-immigrated Paper Bushings Under Three Test Condition
摘要
Abstract
The currently existing test methods of transformer bushing can not meet the needs of responsibility of bushing under only voltage stress due to big gaps with actual conditions.In view of the above problem,we designed a new test device of combination operating condition for bushing and applied three test conditions including the voltage step-by-step,operating voltage,and combined voltage and current to 72.5 kV transformer bushings.The parameters of partial discharge and tan8 were measured for the damped bushing model.In the early state of moisture ingress into bushing,the tendency of tanδ-U increases with the voltage step-by-step condition and does not exceed the test law for moisture bushing.Tendency of tanδ-U increases in waves under the voltage long time and combined voltage condition at the same time.But partial discharge appears obviously under the combined condition.It is suggested that the new test method of the combined voltage and current condition is more beneficial to detect the moistened bushings.It provides a new test method for the quality assessment.关键词
变压器套管/复合工况/潮气入侵/局部放电/介质损耗角正切/故障诊断Key words
transformer bushing/combination operating condition/moisture ingress/partial discharge/tanδ/fault diagnosis引用本文复制引用
戴佺民,齐波,李成榕,Niyomugabo E.Ladislas,卓然,傅明利..三种工况对变压器套管潮气入侵绝缘特性的影响[J].高电压技术,2018,44(2):554-560,7.基金项目
国家高技术研究发展计划(863计划)(2015AA050204) （863计划）
国家自然科学基金(51477052).Project supported by National High-tech Research and Development Program of China (863 Program) (2015AA050204),National Natural Science Foundation of China (51477052). （51477052）
