基于改进Euler法的电力系统暂态稳定性的非线性仿真研究

Nonlinear Simulation of Power System Transient Stability Based on Improved Euler Method

目前,电力系统暂态稳定分析方法主要应用的是数值积分方法,其基本思想是应用数值积分方法求出描述受扰运动微分方程组的时间解,然后根据各发电机转子之间的相对角度变化判断电力系统稳定性。本文应用改进Euler法对一个简单两机电力系统进行非线性时域仿真,研究系统在遭受扰动后的稳定性能。非线性时域仿真曲线验证表明,该系统能够自发恢复初始稳定运行状态,具有较强的稳定性。

At present, the main method of power system transient stability analysis is the numerical integration method.The basic idea is to use the numerical integration method to find the time solution describing the perturbed differential equation, then the stability of the power system is judged by the change of the relative angle between the generator rotors. In this paper, an improved Euler method is used to simulate a simple two-machine power system in nonlinear time domain. The results of nonlinear time domain simulation show that the system can automatically restore the initial stable running state after fault removal, and the system has strong stability.