摘要
纤维杂质颗粒在变压器绝缘油杂质颗粒中的占比超过90%,悬浮在绝缘油中的纤维杂质颗粒在高压直流电场的作用下易发生集聚,导致电场畸变,使绝缘油耐受能力劣化。随着我国高压直流输电工程的快速发展,关于换流变压器液体绝缘系统中纤维杂质颗粒的研究逐渐成为新的研究热点。为此,综合国内外研究现状论述了绝缘油中纤维杂质颗粒的研究进展,分别从纤维杂质颗粒的来源和受力情况、运动集聚规律、放电特性、杂质小桥阻断技术以及油流对纤维杂质颗粒集聚特性的影响这5个方面进行论述和探讨,并展望了未来换流变压器中纤维杂质颗粒研究的发展趋势。通过对现有研究成果的分析和总结,获得的结果可为换流变压器的安全运行以及结构改善提供参考。
Fiber impurity particles account for more than 90%of transformer insulating oil particles.The fiber impurity particles suspended in the insulating oil are prone to agglomerate in the high voltage direct current(HVDC)electric field,which causes the electric field to be distorted and the endurance capability of the insulating oil to deteriorate.With the rapid development of HVDC power transmission project in China,the research on fiber impurity particles in the liquid insulation system of converter transformers has gradually become a new research hotspot.This paper summarizes the research status at home and abroad,discusses the research progress of fiber impurities in insulating oil,including the source and force of fiber impurity particles,law of movement and accumulation,discharge characteristics,as well as impurity bridge blocking technology and the influence of oil flow on fiber impurity.This paper also presents the prospects in the future development trend of fiber impurity particles in converter transformers.The summary of these research results may provide reference for the safe operation and structural improvement of converter transformers.
作者
张国治
王堃
闫伟阳
ZHANG Guozhi;WANG Kun;YAN Weiyang(New Energy and Power Grid Equipment Safety Monitoring Hubei Engineering Research Center,Hubei University Technology,Wuhan 430068,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2022年第11期4297-4305,共9页
High Voltage Engineering
基金
国家自然科学基金(52107144)
湖北省教育厅科技项目(Q20211401)。
关键词
换流变压器
绝缘油
纤维杂质
集聚特性
放电特性
converter transformer
insulating oil
cellulose impurities
law of movement and accumulation
discharge characteristics
