高压直流输电工程阀厅金具设计电流  

Design Current of Hardware in Valve Halls for HVDC Power Transmission Projects

作　　者：梅念[1] 陈东[1] 傅颖[1] 乐波[1] 马为民[1] 石岩[1] 

机构地区：[1]国网北京经济技术研究院,北京市100052

出　　处：《电力建设》2013年第7期47-50,共4页Electric Power Construction

基　　金：国家电网公司重大科技项目(±1100kV换流站设备与阀厅设计关键技术研究)

摘　　要：高压直流输电工程中的阀厅金具通常需要根据阀厅的主设备型式和布置方案进行专题设计。阀厅金具中,阀塔金具和换流变压器Yy/Yd接线金具的载流关系较为复杂。若金具设计电流偏小导致金具局部过热,存在故障隐患;若金具设计电流裕度较大,部分软绞线容易碰撞且金具荷重较大。目前,仅有少数较低电压、较小电流的直流工程阀厅金具已实现国产化。同时,规划的直流工程额定电流越来越大,而金具外的均压罩大小往往受限,使得金具的预留空间较小。为此,根据阀厅主设备型式和典型布置分析布置图中各部分导线电流,同时结合各金具典型接线,分析金具各部分的设计电流。所做工作对后续直流工程阀厅金具载流优化设计具有较好的指导意义。The hardware for valve hall in HVDC projects is designed specifically according to the types of main equipments and layout schemes for valve halls. For the valve hall hardware, the current-carrying between valve hall hardware and Yy/Yd connection hardware in converter transformer is complex： the small design current for hardware will lead to the partial overheat of hardware, while the large design current margin for hardware will lead to the easy collision of flexible stranded conductor and the larger load of hardware. At present, only a little valve hall hardware with low voltage and small current in HVDC projects achieves localization. The rated current of HVDC project planning becomes increasingly large, but the size of grading shield outside the hardware is often limited, which leaves small space for the hardware. Therefore, the conductor current of each part in the layout schemes was analyzed based on the types of main equipments and layout schemes for valve hall, as well as the design current of each part of hardware was studied combined with the typical connection of hardware, which could have a good guiding significance to the current-carrying optimization design of valve hall hardware in subsequent DC projects.

关 键 词：高压直流输电 阀厅 金具 设计电流 

分 类 号：TM721.1[电气工程—电力系统及自动化]