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1000kV淮南-上海输变电工程是我国第一条特高压双回交流输变电工程,全线采用钢管塔并首次选用高颈法兰。由此调研了国内外钢管塔高颈法兰的应用情况,结合压力容器国标以及柔性法兰的思路进行了高颈法兰节点试验,提出了国标基础上的修改意见,建议特高压输电钢管塔优先选用高颈对焊法兰,并推荐了对焊法兰的应用型式。介绍了2008年底在电科院良乡杆塔试验基地进行的国内第一基1000kV特高压双回输电钢管塔真型试验,首次采用了高颈法兰连接主材,并顺利通过所有工况。高颈法兰的节点及真型塔试验,验证了高颈法兰应用于输电线路钢管塔的可行性及安全性,为其在皖电东送特高压工程中的首次应用提供技术支撑,也为今后相关研究提供参考。
1000kV Huainan - Shanghai Power Transmission and Transformation Project is the first UHV double-circuit AC power transmission and transformation project in China. It adopts steel pipe tower for the first time and selects high-necked flange for the first time. Based on this, the application of high-necked flanges in steel pipe towers at home and abroad was investigated. The high-necked flange joint test was carried out based on the national standard of flexible pressure vessels and flexible flanges. The proposed amendments based on national standards were proposed. High neck welded flange is preferred, and the application of butt welded flange is recommended. Introduced the end of 2008 in the Electric Power Research Institute base Liangxiang pole base of the first 1000kV UHV double-circuit steel tube tower test, the first time using high-neck flange connection main material, and successfully passed all the conditions. High-necked flange joints and true-type tower test verify the feasibility and safety of high-necked flange applied to steel tube tower of transmission line and provide technical support for its first application in UHV project from Anhui to East China. Provide reference for related research in the future.