基于强制空气冷却的换流变阀侧套管设计及特性  

Design and Characteristics of Side Bushing of Converter Valve Based on Forced Air Cooling Technology

作　　者：刘杉 侯俊义 周建辉 王航 周亮 韩晓东 LIU Shan;HOU Junyi;ZHOU Jianhui;WANG Hang;ZHOU Liang;HAN Xiaodong(State Key Laboratory of Advance Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China;Beijing DC T&D Engineering Technology Research Center,China-EPRI Electric Power Engineering Co.,Ltd.,Beijing 102200,China;XIAN XD High Voltage Bushing Co.,Ltd.,Xi’an 712044,China)

机构地区：[1]先进输电国家重点实验室(全球能源互联网研究院有限公司),北京102211 [2]北京市直流输配电工程技术研究中心(中电普瑞电力工程有限公司),北京102200 [3]西安西电高压套管有限公司,西安712044

出　　处：《高电压技术》2022年第11期4478-4487,共10页High Voltage Engineering

基　　金：国家电网公司总部科技项目(5500-201958518A-0-0-00)。

摘　　要：低热导率的环氧芯体使得阀侧套管散热困难,造成套管温度过高。该隐患严重危害套管安全运行,并对芯体生产工艺提出严苛要求,从而制约套管国产化发展。针对套管过热难题,提出了基于强制空气冷却的阀侧套管(简称风冷套管)设计技术,并建立风冷套管的热电–流固耦合仿真模型,分析了风冷套管的温度、载流和暂态等特性。在此基础上,研制了±800kV阀侧风冷套管样机,并通过了试验验证。结果表明:风冷套管技术可以有效降低套管温度,提高套管均温性以及增大套管45%通流能力。该技术有效解决了套管过热问题,是提升阀侧套管运行可靠性和完成国产化替代的有效途径之一。The epoxy core with low thermal conductivity makes it difficult for the side bushing of converter valve to dissipate heat,resulting in excessive temperature,which seriously endangers the safe operation of the bushing.Meanwhile,strict requirements should be met in the production process of the core body,which restricts the development of the localization of the bushing.In response to this problem,this paper proposes a valve-side bushing(referred to as air-cooled bushing)technology based on forced air cooling.The thermoelectric-fluid-structure coupling simulation model of the air-cooled bushing is established,and the temperature,current-carrying and transient characteristics of the air-cooled bushing are analyzed.On this basis,the±800 kV valve-side air-cooled bushing prototype is developed and verified by tests.The results show that the air-cooled bushing technology can be utilized to effectively reduce the bushing temperature,improve the temperature uniformity,and increase the flow capacity by 45%.Therefore,this technology can be utilized to effectively solve the problem of overheating of the bushing,and it is one of the effective ways to improve the reliability of the bushing and complete the replacement of localization.

关 键 词：阀侧套管 过热 空气冷却 温升试验 风冷系统 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM216.5[一般工业技术—材料科学与工程]