基于多物理场耦合方法的变压器绕组振动仿真与试验研究

Simulation and Test on Vibration of Power Transformer Windings Based on Multiple Physics Coupling Method

为了研究电力变压器绕组的振动特性,针对S11-M-500/35型变压器,基于多物理场耦合仿真的方法,建立了电力变压器三维仿真模型,对电力变压器电场、磁场和结构力场进行耦合仿真。仿真得到变压器在一次侧通过额定负载电流的情况下,二次侧的电压、电流值,铁芯、绕组的磁场分布以及变压器器身的振动值。为了验证仿真模型的准确性,针对变压器样机进行额定负载试验,并测试变压器器身的振动信号。分析表明,仿真结果与试验数据吻合良好,为变压器的优化设计和故障诊断提供了依据。

For researching the vibration characteristics of power transformer windings,aiming at a type S- 11- M- 500 /35 power transformer,the 3D model of power transformer is built based on the simulating method of multiple physics coupling. The electromagnetic and structure coupling field of power transformer is simulated. The voltage and current in secondary side,magnetic field distribution and vibration of power transformer is obtained under the condition of rated load current. The load test is made on the prototype to calibrate simulation model. Analysis results indicate that simulation results accords with experiment data well,which provides the evidence for researching the optimization and faults diagnosis of the power transformer.