基于不同运行工况下双馈风力发电机电磁场计算与分析

风力发电机组在正常运行过程中,很容易受到外界扰动,分析研究不同运行工况对风力机组的影响具有重要的意义。基于ANSYS有限元分析软件,建立某风电场1.5MW双馈风力发电机的2维模型,通过对正常运行工况、电网电压三相不平衡以及风速突变工况下双馈发电机气隙磁密和磁力线分布进行仿真和分析,得到不同运行工况对双馈发电机的影响。仿真结果表明:电网电压三相不平衡和风速突变工况下,双馈发电机气隙磁密都会发生变化,而且前者气隙磁密发生了明显的畸变,漏磁增加,损耗增加。

Based on different conditions DFIG electromagnetic field calculation and analysis

During normal operation, it is very vulnerable to external disturbances, so the analysis and research of different operating conditions have significant impact on wind turbines. Based on finite element analysis software ANSYS, a two-dimensional electromagnetic field model of doubly fed induction generator (DFIG), whose capacity is 1.5MW and is installed in a certain wind farm, is established. During normal operating conditions, grid voltage unbalance and wind speed mutation conditions to simulate and analyze the doubly-fed generator air gap flux density, magnetic field lines distribution,we will obtain the effects of different conditions on the doubly-fed generator. The simulation results show that grid voltage unbalance conditions and wind speed mutation conditions, doubly-fed generator and air gap flux density will change, but a significant distortion occurred in the former flux density, magnetic flux leakage increases, the loss increases.