变压器绕组受力薄弱点分析及仿真研究

Analysis and Simulation Research of Transformer Winding Stress Vulnerabilities

为了研究变压器绕组的受力薄弱点规律,基于有限元仿真软件实现了变压器的电场-磁场-机械场耦合分析。基于建立的差异化的变压器三维仿真模型分析,归纳了差异化的仿真模型对绕组受力薄弱点的影响规律,总结了差异化仿真模型对研究结果的影响规律;基于对不同撑条、垫块数量下的绕组受力薄弱点分布差异的分析,研究了变压器撑条、垫块数对绕组受力薄弱点的影响规律,结果表明撑条、垫块数量增加1/3~2/3时最大可将绕组的最大受力值降低36%左右;基于对改变铁心、绕组、撑条及垫块的材料参数仿真分析,归纳了不同材料参数下绕组的受力薄弱点分布规律,分析结果表明,对于绕组影响较大的材料参数为密度和泊松比,而对撑条、垫块影响较大的材料参数则为杨氏模量。

In order to study the law of transformer windings stress vulnerabilities, this study implemented electric field-magnetic field-mechanical field coupling analysis based on the finite element simulation software. Based on the analysis of the differentiation transformer 3D simulation model, this study summarizes the differentiation simulation model influence law of the transformer windings stress vulnerabilities,and the differentiation simulation model influ- ence law of the research results. Based on the analysis of the transformer windings stress vulnerabilities distribution under different quantity of blocks and stays,this study summarizes the law of transformer windings stress vulnerabili- ties under different quantity of blocks and stays transformer. The simulation results show that the increases in quantity of blocks and stays by 1/3 ~ 2/3 can be decrease the maximum force value by about 36%. Based on changing the iron core,windings,stays and blocks material parameters, this simulation analysis summarizes the law of the trans- former windings stress vulnerabilities under differential material parameters. The simulation results show that the greater impacts of the windings material parameters are density and Poisson＇ s ratio, and the greater impacts of blocks and stays material parameters is Young＇ s modulus.