基于有限差分和有限体积法相结合的油浸式变压器三维温度场计算

发布时间：2018-11-12 17:48

【摘要】：为准确计算油浸变压器的温度场,在对比有限体积法(FVM)和有限差分法(FDM)各自优点的基础上,提出了一种计算变压器温度场的混合计算方法。以驻马店金桥变电站的一台31.5 MVA主变为例,建立了3维模型,利用有限体积和有限差分混合计算方法,并在绕组和铁芯的热传导计算中采用了高精度的预条件共轭梯度解法(PCGM),计算了变压器的3维温度场。将利用混合方法的平均温度计算结果分别与实际监测数据、使用同样模型的FDM及FVM算法计算出的数据、以及使用IEEE导则模型计算出的数据进行了对比。对比结果表明:混合算法的计算精度明显高于利用IEEE导则模型、FDM算法和FVM算法的计算结果,证明了这种混合计算方法能更准确地计算油浸式变压器的内部温度场。
[Abstract]:In order to accurately calculate the temperature field of oil-immersed transformer, a hybrid calculation method for calculating temperature field of transformer is proposed on the basis of comparing the advantages of finite volume method (FVM) and finite difference method (FDM). Taking the 31.5 MVA master transformation of Jinqiao substation in Zhumadian as an example, a three-dimensional model is established, and the finite volume and finite difference hybrid calculation method is used. The high precision preconditioned conjugate gradient solution (PCGM),) is used to calculate the three dimensional temperature field of the transformer in the heat conduction calculation of the winding and the core. The calculated results of the average temperature using the hybrid method are compared with the actual monitoring data, the data calculated by the FDM and FVM algorithms of the same model, and the data calculated by the IEEE guideline model. The comparison results show that the accuracy of hybrid algorithm is obviously higher than that of using IEEE guide model, FDM algorithm and FVM algorithm. It is proved that the hybrid algorithm can calculate the internal temperature field of oil-immersed transformer more accurately.
【作者单位】：华北电力大学河北省输变电设备安全防御重点实验室;中国电力科学研究院;国网河南省电力公司驻马店供电公司;
【基金】：国家高技术研究发展计划(863计划)(2012AA050802) 中央高校基本科研业务费项目(13MS73) 国家电网科技项(1206112011018)~~
【分类号】：TM411

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