基于有限元法的大型电力变压器抗短路能力分析

发布时间：2018-05-16 02:26

本文选题：变压器 + 抗短路能力　；参考：《高电压技术》2014年10期

【摘要】：为验证基于有限元法的变压器抗短路能力计算方法的有效性,通过开展变压器基于磁场有限元方法的计算分析,并进行了突发短路试验的220 kV变压器的试验结果和计算结果对比,以及因输电线路短路导致故障的500 kV变压器实际受损部位与计算分析结果对比。由通过了突发短路试验的新变压器与在运变压器的数据对比,分析了变压器低压线圈辐向宽度、所用电磁线尺寸、撑条以及电磁线Rp0.2对变压器抗短路能力的影响。结果表明:通过变压器短路试验的产品在低压线圈辐向宽度增加了10%~22%,其电磁线的子导线尺寸增加了35%~50%。通过此项研究,验证了该分析方法关于绕组机械强度分析的有效性,为新采购变压器的抗短路能力分析评估提供了手段。
[Abstract]:In order to verify the validity of the calculation method of transformer's anti-short-circuit ability based on finite element method, the calculation and analysis of transformer based on magnetic field finite element method are carried out. The test results and calculation results of 220 kV transformers with sudden short circuit test are compared, and the actual damaged parts of 500 kV transformers caused by short circuit of transmission lines are compared with the results of calculation and analysis. By comparing the data of the new transformer which passed the sudden short-circuit test with that of the in-service transformer, the influence of the width of the low-voltage coil, the size of the electromagnetic wire used, the bracing and the Rp0.2 of the electromagnetic line on the short-circuit resistance of the transformer are analyzed. The results show that the width of the low voltage coil is increased by 10 / 22 for the products tested by the transformer short circuit, and the size of the sub-conductor of the electromagnetic wire is increased by 35 / 50. Through this research, the validity of the analysis method on mechanical strength analysis of windings is verified, which provides a means for the analysis and evaluation of the short-circuit resistance ability of the newly purchased transformers.
【作者单位】：中国电力科学研究院;
【基金】：国家电网公司科研项目(GY71-12-010)~~
【分类号】：TM41

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