基于PSCAD的永磁直驱风电机组简化模型研究

针对风电机组的电磁暂态模型求解耗时长、仿真计算工作量大、数值收敛性差等不足,在研究直驱机电暂态及运行控制方式的基础上,利用PSCAD仿真工具构建了直驱风电机组简化模型,并分别在恒定风速、阶跃风速和电网故障三种工况下进行了仿真验证。结果表明,基于PSCAD的直驱风电机组简化模型可行、有效,在保证一定的计算精度下,可大幅提高计算速度,且当风机台数增加时,速度提高更加明显。

Research of Direct-driven Permanent-magnet Synchronous Generator Simplified Model Based on PSCAD

Solving the electromagnetic transient model of the wind turbine has some drawbacks, such as time-consuming, heavy workload of simulation calculation and poor of numerical convergence. Based on the study of direct-driven electromechanical transient and operation control method, the PSCAD simulation tool is used to establish the direct-driven wind turbine simplify model. The model is verified by simulation under three kinds of operating conditions: the constant wind speed, the step wind speed and the grid fault. The results show that the direct-driven wind turbine simplified model based PSCAD is feasible and effective; it can significantly improve the calculation speed while guaranteeing the certain accuracy; the increase of calculation speed is more obvious when adding the number of wind turbines.