摘要
研究了变压器绕组的机电耦合振动稳定性问题,建立了变压器绕组轴向机电耦合的动力学模型。将变压器绕组的漏磁场简化成二维磁场,得到其解析解,采用机电耦合系统的Lagrange方程,分析得到变压器绕组机电耦合的非线性振动方程,以及简化的耦合振动方程。应用动力学理论分析载流的变压器绕组轴向振动的稳定性,得到了模型变压器绕组主要设计参数的稳定域和不稳定域,分析大电流引起变压器绕组失稳的机理。
This paper deals with the electromechanical coupled vibration problem in transformer. A new dynamic model for the axial vibration of transformer抯 winding is presented. The transformer leakage magnetic field is simplified to a 2-dimensional magnetic field, and analytic formulation of the transformer leakage field is obtained. Base on the Lagrange equation of electromechanical coupled system, the nonlinear and simplified linear electromechanical coupled axial vibration equations of windings are obtained. The stability of the axial vibration of the transformer windings is analyzed by means of the dynamics theory. Using designed transformer model as an example, it is shown that instability occurs during high currents, and the stability and instability regions of design parameters are obtained.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第7期24-28,共5页
Proceedings of the CSEE
基金
河北省教育厅自科学基金项目(Z2001214)。
关键词
电力变压器
绕组
轴向振动
稳定性分析
动力学模型
power transformer
electromechanical coupled vibration
stability
winding deformation
