﻿ 电力变压器短路故障的漏磁场及短路力的建模研究

# 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

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.

[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.

Top