异步风力发电机组的简化RX模型及其潮流计算

A Simplified RX Model of Asynchronous Wind Generators and Load Flow Analysis

介绍了异步风力发电机组的稳态模型,在传统RX模型的基础上,将风力机吸收的机械功率与发电机的电功率之间的差值、异步发电机的滑差引入牛顿迭代法的修正方程,形成扩展修正方程,从而避免了传统RX模型算法实现中的2个迭代过程,使牛顿迭代法仍具有平方收敛。同时,在迭代过程中引入加速系数,提高了迭代收敛速度。最后,通过甘肃省昌马风电场接入系统潮流计算结果的对比分析,验证了所提出的异步风力发电机组的简化RX模型及其潮流计算的有效性。

The paper introduces the steady model of wind turbines with an asynchronous generator. Based on the conventional RX model, the difference between mechanical power and electric power for a wind turbine, and the slip of an asynchronous generator are introduced into the correction function of Newton iteration method to form an expanded correction function. The method avoids the two iteration loops needed for the conventional RX method and retains the quadratic convergence speed of Newton iteration method. An acceleration factor is also proposed in the method to enhance the convergence speed. An application to the power flow calculation for the Changma Wind Farm in Gansu Province proved the feasibility of the proposed method.