风荷载作用下特高压变压器套管接线柱结构受力仿真与试验

为分析风荷载作用下引下线对特高压变压器套管顶部接线柱的作用效应,通过仿真分析与等效风荷载试验测试方法研究了端子板类型、引下线布置方式、跨点间距变化等影响因素对变压器套管接线柱应力作用。结果表明：在风速作用下套管接线柱是结构体系的受力薄弱部分,无法满足25.98m/s风速作用的结构安全要求；仿真分析模型与试验测试结果误差在-9.06%~7.97%；采用一字型端子板、单引下线结构形式可降低34.60%套管接线柱受力。可见进行引下线结构体系优化,可确保变压器套管在户外环境下的安全运行。

Force Simulation and Test of UHV Transformer Bushing Terminal under Wind Load

In order to analyze the effect of the down conductor on the UHV transformer bushing terminal under wind load, simulation analysis and equivalent wind load test method was used to investigate the influence of factors such as terminal board type, down conductor layout and span spacing variation on the stress of the transformer bushing terminal. The results show that the bushing terminal is the weakest part of the structural system under wind load, which cannot meet the structural safety requirements in the wind speed of 25.98m/s, and the error between simulation analysis and test results is between -9.06% and 7.97%, and the use of a flat-shaped terminal block and a single-wire down conductor structure can reduce 34.60% stress of the bushing terminal. It is concluded that the optimization of the down conductor structure system can ensure the safe operation of the transformer bushing in an outdoor environment.