消除电力系统故障仿真中数值振荡的方法研究

Study of Eliminating Numerical oscillations in Power System Simulation

在电力系统故障数字仿真中,网络结构发生变化时会引起非状态变量的突变,进而有可能造成非原型的数值振荡.基于数值振荡是电力系统数字仿真领域中一个长期困扰的问题,本文运用实例,深入研究分析了数值振荡问题产生的根本原因,就抑制数值振荡问题的方法进行了理论分析,并以电路实例进行了仿真计算.理论推导和实际算例都表明,阻尼法计算精度高、消除数值振荡的优点突出,计算量也不大,在实际数字仿真中可以广泛的应用.

In the digital simulation of power systems transient, the change of network can cause the jumping of non - state variant,which may bring non - prototype oscillations. This is a big problem in the digital simulation of power systems. Based on the deeply analysis of essential reason caused numerical oscillations, this paper presents some ways to solve this problem. Both theoretic analysis and example indicate that the damping method is very good. The advantage of eliminating oscillations is obvious and the damping method can be used widely in the digital simulation of power systems.