基于磁-結構耦合法的變壓器繞組振動特性研究
王洋，曹晨，徐建源
沈陽工業大學 電氣工程學院，遼寧 沈陽 110870
摘 要：基于S11-M-500/35型變壓器，利用有限元磁-結構耦合法分別計算了變壓器負載運行、第一次短路沖擊、第二次短路沖擊過程中的變壓器繞組徑向振動加速度，研究了變壓器繞組的磁場分布，以及變壓器繞組在不同預緊力下的模態，并通過短路沖擊試驗對計算結果進行了驗證。結果表明變壓器繞組在受到短路沖擊后，繞組漏磁通密度變大8.7倍，繞組線圈上承受的電磁力變大，繞組振動加速度幅值變大，仿真結果與試驗數據吻合良好，為變壓器的優化設計和故障診斷提供了理論依據。關鍵詞：變壓器繞組；有限元；短路試驗 中圖分類號：TM403.2 文獻標識碼：A 文章編號：1007-3175(2016)02-0005-04
Transformer Winding Vibration Characteristic Research Based on Magnetic-Structure Coupling Method
WANG Yang, CAO Chen, XU Jian-yuan
School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Abstract: Based on the model of transformer S11-M-500/35, this paper used the finite element method to respectively calculate the transformer load operation, the transformer winding radial vibration acceleration in the process of the first short circuit impact and second short circuit impact, and studied the magnetic field distribution of transformer winding and the transformer winding modal under different pre-tightening force, the short-circuit test results verified. The results show that after the transformer winding was impacted by short circuit, the winding leakage magnetic flux density became 8.7 times, the electromagnetic force on winding coils and the winding vibration acceleration amplitude became larger. The simulation result is identical to test data well, which provides the theoretical foundation for optimization design and fault diagnosis of transformers.
Key words: transformer winding; the finite element; short circuit test
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