电力变压器短路故障的漏磁场及短路力的建模研究
Research on the Modeling of Leakage Magnetic Field and Short-Circuit Force of Power Transformer’s Short Circuit Fault

作者: 徐肖伟 , 王景林 , 钱国超 , 邹德旭 :云南电力试验研究院(集团)有限公司电力研究院,昆明; 李冰阳 , 臧春艳 :华中科技大学,电气与电子工程学院,武汉; 罗 兵 , 张福增 :特高压工程技术(昆明、广州)国家工程实验室,广州;

关键词: 变压器二维轴对称三维模型漏磁场电动力Transformers 2-D Axisymmetric 3-D Model Parametric Short-Circuit Force

摘要:
近年来电力变压器短路故障频发,严重影响电网可靠运行,因此很有必要在理论上开展对电力变压器绕组的短路性能的研究。本文以一台较常见的三相三柱式独立绕组结构的220 kV电力变压器为例,在ANSYS中分别建立了变压器整体结构的二维轴对称和三维模型,计算变压器在三相对称短路情况下各绕组漏磁场和短路电动力,并进行对比分析,总结了漏磁密及电动力分布相应规律,同时与变压器现场吊包解体检查的结果作对比,验证了分析结果。本文的研究结论可为电力变压器短路故障研究提供一定参考。

Abstract: In recent years, the short-circuit fault of power transformer occurred frequently and seriously af-fected the reliable operation of power grid. So it is necessary to analyze the short circuit perfor-mance of transformer windings in theory. This paper has taken a three-phase three limb trans-former of 220 kV for an example, and the 2-D transient axisymmetric electromagnetic field and 3-D electromagnetic field are both studied by ANSYS. The leakage magnetic field and the short- circuit force in each winding are both calculated and analyzed during three-phase short circuit. Then the distribution rules of them are concluded. By comparing the results of transformer winding’s disintegration test, the analysis results are verified. The research conclusion may provide a reference to the analysis of the short-circuit fault of the power transformer.

文章引用: 徐肖伟 , 王景林 , 钱国超 , 邹德旭 , 李冰阳 , 臧春艳 , 罗 兵 , 张福增 (2014) 电力变压器短路故障的漏磁场及短路力的建模研究。 电气工程, 2, 73-81. doi: 10.12677/JEE.2014.24010

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