摘要
根据计算奇异扰动(CSP)理论,结合电力系统多时间尺度的特征,提出将系统状态变量运行模式分为快动态和慢动态,因快动态往往在仿真中最先耗尽并衰减到稳定值,故利用等效变换将快动态和慢动态解耦,并根据其时间尺度的特征进行CSP计算。在数值积分的过程中逐步忽略耗尽的快动态,将系统刚性方程变为非刚性方程,增大仿真步长,从而从多方面减少求解时间,提高求解效率。仿真结果证明了该方法的有效性和实用性,运算时间比较表明效率提高了20.6%。
According to the multi-time scale character of power system and based on the CSP（Computational Singular Perturbation） theory, the operation mode of system state variables is divided into fast dynamic component and slow dynamic component. As the fast component always decays to a stable value first, it could be decoupled from the slow one using equivalent transform and its CSP be calculated according to its multi-time scale character. The exhausting fast dynamic component is ignored gradually in the process of numerical integral, making the stiff equation non-stiff. The simulation step is increased at the same time to shorten the simulation time and improve the efficiency. Simulation result shows its effectiveness and practicability, with efficiency increase of 20. 6%.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第1期46-49,53,共5页
Electric Power Automation Equipment
基金
国家自然科学基金项目(50507018)~~
关键词
电力系统
暂态稳定
时域仿真
计算奇异扰动
power system
transient stability
time domain simulation
computational singular perturbation
