基于混合仿真方法的电力系统暂态稳定分析

Analysis of Power System's Transient Stability Based on Mixed Simulation Method

时域仿真法是暂态稳定分析基本方法,包括显示积分法和隐式积分法。结合显示和隐式两种方法进行微分方程的求解,提出了混合积分方法,发电机系统采用稳定性较好的隐式梯形积分法,励磁系统则采用基于简单模型的改进欧拉法。仿真结果表明,这种混合迭代算法结果准确,可以提高微分-代数方程的求解速度。

Time domain simulation is a basic method for analysis of transient stability including improved explicit integration method and implicit numerical integration method. Combined with improved explicit and implicit numerical two methods to carry out solution of equation, this paper raised the hybrid integration method. The generator system adopted implicit numerical integration method with better stability, while the excitation system adopted improved Euler method based on simple model. The Simulation result shows that this composite iteration method can raise the speed of solutions for differential-algebraic equations with correct results.