暂态稳定分布式仿真计算的改进算法

电网互联和电力系统市场化发展趋势对暂态稳定分布式计算提出了要求.文中研究了电力非线性网络暂态稳定分布式仿真算法的计算效率问题,指出算法的瓶颈主要是子系统边界值的迭代求解计算,提出了改善非线性网络分布式求解效率的交接变量估计法,进行了数值验证,并与适于线性网络求解的并行处理方法、已有的电力网络暂态稳定初值估计法和交接变量调节法进行了比较.数值实验表明,文中提出的方法可在较大程度上稳定地改善暂态稳定分布式仿真分析的计算效率,与电力市场条件有一定的适应性.

IMPROVED ALGORITHM FOR TRANSIENT STABILITY DISTRIBUTED SIMULATION

To meet the demand for transient stability distributed simulation in the environment of power network interconnection and electricity market, the computation efficiency is studied for power nonlinear network transient stability distributed simulation. It is pointed out that the iterative computation of the subsystem boundary values is the main bottleneck. An efficiency enhancement method, inside-step cross-variable estimation (ICE) method, is put forward for nonlinear network distributed solution. A numerical validation is carried out, and the comparisons are provided with the parallel disposal method suited to linear network solution and the existing power network transient stability step initial-value estimation (SIE) method and inside-step cross-variable adjustment (ICA) method. It is testified from the numerical experiment that the ICE method can improve the distributed transient stability computation efficiency greatly and stably and is more adaptable to the electricity market environment.