含双馈感应发电机的电网多步长快速暂态仿真

为提高含双馈感应发电机(doubly-fed inductiongenerator,DFIG)的电网暂态仿真效率,提出一种多步长快速暂态仿真方法。该方法在系统积分步长不变的情况下,通过可变参数改变双馈感应发电机模型的积分步长。对双馈感应发电机模型在改变后的步长下进行数值计算,此过程无需求解电力系统网络方程,当双馈感应发电机模型的积分时间和系统积分时间同步时,双馈感应发电机模型与系统其他元件统一进行精确的数值计算。简单系统和经典电力系统的仿真计算结果表明,所提仿真方法计算速度快、精度高,是一种有效、实用的计算方法。

Multi-step Fast Transient Simulation for Doubly Fed Induction Generators in Grid

In order to improve the transient simulation efficiency of power grid with doubly-fed induction generator(DFIG) included,a multi-step fast simulation method was proposed.Under constant system integration step size,the integration step size of DFIG can be changed by the variable parameter.Thus the numerical calculation of DFIG model can be gained based on the changed step size,and the solution of network equations in power system is unnecessary.What’s more,when the integration time of DFIG synchronizes with the system’s integration time,DFIG model should be combined with other elements in power system for exact numerical calculation.The simulation results under both simple power system and classical power system show that the proposed method,with fast calculation speed and high precision,is not only effective but also practical.