±800kV换流变阀侧套管温度场仿真与大电流温升试验分析  

Simulation and Experimental Analysis of±800 kV Converter Transformer Valve-side Bushing Under High Current

作　　者：谢更生 史石峰 王琪林 王青于 刘鹏[1] 彭宗仁[1] XIE Gengsheng;SHI Shifeng;WANG Qiin;WANG Qingyu;LIU Peng;PENG Zongren(State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电气工程学院电工材料电气绝缘全国重点实验室,西安710049

出　　处：《高电压技术》2024年第3期994-1002,共9页High Voltage Engineering

基　　金：国家电网公司科技项目(SGLNDK00KJJS1900250)。

摘　　要：随着我国高压直流输电工程的发展,输送功率不断提升,胶浸纸(resin impregnated paper,RIP)套管的发热问题越发突出。面对±800k V特高压直流输电工程进一步提升输送容量的挑战,为避免RIP套管发热严重、温度过高带来的安全问题,提出了一种RIP换流变阀侧套管的设计方案,并通过仿真模拟与温升试验进行验证。首先,在套管设计方案中,通过引入衬管结构、增加导体直径等手段来降低热点温度;然后,提出了一种针对RIP套管温度场的改进计算方法,对套管热设计进行了仿真校核;最后,对基于该设计方案制造的套管进行了温升试验考核。仿真与温升试验结果表明:该文提出的RIP换流变阀侧套管可以满足工程要求,其载流量(等效工频电流)可达6736 A。With the development of high voltage direct current(HVDC)projects in China,transmission capacity keeps growing,which makes the heating problem of resin impregnated paper(RIP)bushing more and more serious.Facing the challenge of further increasing transmission capacity of±800 kV UHVDC project,we proposed and verified a design scheme of RIP converter transformer valve-side bushing by simulation and temperature rise test in order to avoid safety problem caused by serious heating and excessive temperature of RIP bushing.First,the hot-spot temperature of bushing was reduced by introducing outer-winding tube structure and increasing conductor diameter in the design scheme.Then,an improved calculation method for temperature distribution of RIP bushing was proposed and used to verify the thermal design of bushing.Finally,the bushing manufactured on the basis of the design scheme was verified by temperature rise test.The simulation and temperature rise test results show that the design scheme of RIP converter transformer valve-side bushing can meet the engineering requirements,whose current-carrying capacity can reach 6736 A(equivalent industrial frequency current).

关 键 词：胶浸纸套管 换流变阀侧套管 直流输电工程 计算流体力学 温升试验 

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]