摘要
气体绝缘金属封闭开关设备在电网领域得到广泛应用,其漏气现象是目前变电站设备运维中经常发生的一类缺陷,严重影响电网的安全运行。对气体绝缘金属封闭开关设备的漏气缺陷研究及其在线封堵技术进行了综述和分析,以期促进该技术领域的研究进展。总结了气体绝缘金属封闭开关设备漏气缺陷的类别,并阐述了缺陷形成的原因。漏气缺陷的形式主要包括铸造及焊缝缺陷,盆式绝缘子开裂,法兰密封失效、伸缩节缺陷以及铝合金壳体腐蚀。设计、制造、安装、运维各环节存在的质量问题是导致缺陷发生的主要原因。分析了目前国内外常用的气体绝缘金属封闭开关漏气在线封堵技术的特点及其适用情况。目前常用的封堵技术包括密封注剂法、复合材料法兰重塑法、机械冲击法、胶接导流法、夹具胶接法。根据部件结构及漏气情况,选择适宜的在线封堵技术,可在不影响设备运行的情况下完成漏气缺陷的消除,具有重要的工程实用价值。
In recent years,gas insulated switchgear has been widely used in the field of electric grid.Gas leaking is a kind of defect that often occurs in the operation and maintenance of substation equipment,which poses a great threat to the safety of equipment operation.Investigation of Gas leaking and on-line sealing technology of gas insulated switchgear has been reviewed and analyzed.It is expected that this study will facilitate the development of this technology field.Thus,the type of leaking defect was summarized and the reason for gas leaking was elucidated.The form of gas leaking includes casting and welding defects,cracking of disc insulator,failure of flange sealing,expansion joint defect and corrosion of aluminum shell.The reason for gas leaking is the existence of quality problems in the links of design,fabrication,installation and maintenance.Characteristics and the applicable condition of online gas leaking sealing technology at home and abroad were analyzed.Sealing technology that has been adopted currently includes sealing and injection method,flange remolding method,mechanical impact method,bonding and diversion method,fixing and adhesion method.Gas leaking defects can be eliminated without affecting the operation of equipment by adopting proper online sealing technology according to the structure of components and gas leaking condition.Thus,the on-line sealing technology is of great importance in engineering.
作者
杜宝帅
张忠文
乔亚霞
索帅
李新梅
邓化凌
罗宏建
DU Baoshuai;ZHANG Zhongwen;QIAO Yaxia;SUO Shuai;LI Xinmei;DENG Hualing;LUO Hongjian(State Grid Shandong Electric Power Research Institute,Jinan 250002,China;China Electric Power Research Institute,Beijing 100055,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China)
出处
《电力科学与工程》
2020年第2期34-41,共8页
Electric Power Science and Engineering
基金
国家电网有限公司总部科技项目(SGZJ0000KXJS1800302)。
