500 kV单排变电构架结构选型研究  

Research on Selection of 500 kV Substation Truss Structures

作　　者：鲁伟 高湛[1] 吴必华[1] 闫勇[1] LU Wei, GAO Zhan, WU Bi-hua, YAN Yong(Central Southern China Electric Power Design Institute, Wuhan 430071, China)

机构地区：[1]中南电力设计院,湖北武汉430071

出　　处：《电力勘测设计》2018年第A02期64-69,共6页Electric Power Survey & Design

摘　　要：以500 kV 6孔出线门型构架为例,采用"STAAD/CHINA"软件,分别对"钢管柱+格构式梁"、"角钢格构式"和"全钢管结构"三种结构型式的构架进行空间计算,并对三者的优缺点、受力和变形特点、节点连接、适用范围进行技术经济分析。结果表明:(1)角钢格构式结构的用钢量最大、综合造价最低,全钢管结构用钢量适中、综合造价最高,钢管柱+格构式梁结构用钢量最少、综合造价适中;(2)格构式构架梁、柱主材截面通常由承载力控制,钢管梁截面通常由位移控制,钢管柱主材截面由承载力和位移双控;(3)钢管柱+格构式梁结构在温度作用下的温度应力最小、抵抗温度作用的能力最强;(4)国内工程宜采用钢管柱+格构式梁结构并采用杯口插入式柱脚,国外工程宜采用角钢格构式结构并采用露出式柱脚。When choosing the structure type of the 500 kV substation truss, taking 6-oulet portal frame as the example, several truss structures commonly used in domestic and overseas projects were selected. Spatial analysis program was used to perform overall analysis calculation and technical and economical analysis were also conducted at different aspects. The results indicated that ： （1） Angle latticed structures consume the most steel with the lowest comprehensive cost, pipe structures cost the most, composite structures consume the least steel; （2） The section of lattice beams and columns are usually controlled by the bearing capacity, the section of pipe beams are controlled by the displacement, the pipe columns need to meet both; （3） Composite structures cause least stress under the temperature effect with the strongest ability to resist it among the structure types studied; （4） It＇s advisable to adopt composite structures with embedded column base at domestic projects, as for overseas projects, angle latticed structures with the open base with anchor bolts are the most appropriate.

关 键 词：变电构架 结构选型 节点连接 

分 类 号：TM63[电气工程—电力系统及自动化]