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
DOI: 10.12677/JEE.2014.24010,
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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.
参考文献
[1]
|
金文龙, 陈建华, 李光范, 等 (1999) 全国110 kV及以上等级电力变压器短路损坏事故统计分析. 电网技术, 6, 21-25.
|
[2]
|
施广宇, 蒋良胜 (2006) 电力变压器短路损坏分析. 福建电力与电工, 1, 3-6.
|
[3]
|
姜益民 (2002) 变压器抗短路能力简析. 变压器, 39, 27-29.
|
[4]
|
(2008) 国家标准: GB1094.5-2008, 电力变压器. 中国标准出版社, 北京.
|
[5]
|
乔静秋, 等 (1989) 三相突然短路时变压器电磁场的数值计算. 哈尔滨电工学院学报, 2, 127-135.
|
[6]
|
韩芳旭, 李岩, 孙昕 (2010) 电力变压器漏磁场和短路阻抗计算. 变压器, 10, 9-12.
|
[7]
|
王建民, 张喜乐, 翟元, 等 (2012) 大型变压器绕组漏磁场及短路力学性能的仿真分析. 电气制造, 5, 60-64.
|
[8]
|
Wang, H. and Butler, K.L. (2001) Finite element analysis of internal winding faults in distribution transformers. IEEE Transactions on Power Delivery, 16, 422-428.
|
[9]
|
徐勇, 周腊吾, 朱英浩, 等 (2003) 变压器漏磁场的分析. 变压器, 9, 1-3.
|
[10]
|
Hori, Y. and Okuyama, K. (1980) Axial vibration analysis of transformer windings under short circuit condition. IEEE Transactions on Power Apparatus and Systems, 99, 443-451.
|