改进的暂态稳定分布式并行仿真算法

针对基于支路分割和区域迭代的暂态稳定分布式并行算法的计算效率问题，根据电力系统机电暂态过程电气变量的响应特点和分布式协同计算实现过程中子系统间的信息交接特点，提出了改善暂态稳定仿真分布式计算效率的积分步初值估计法和积分步内交接变量修正调节法。应用1 000母线200机系统算例，在暂态稳定虚拟并行计算平台VAPPTSSP上对改进算法进行了验证。改进算法降低了系统计算收敛交接变量的必要通信频度，改善了数值仿真系统的迭代收敛特性，在较大程度上提高了暂态稳定分布式并行计算的效率。

IMPROVED PARALLEL ALGORITHM FOR TRANSIENT STABILITY DISTRIBUTED SIMULATION

To deal with the computation efficiency problem of power system transient stability distributed simulation using branch cutting and subsystem iterating parallel method, the paper analyzes the characteristics of bus voltage in the electromechanical transient process and of message communication between subsystems in the process of distributed computation. An improved parallel algorithm based on inter step initial value estimation and inside step communicating message adjustment is presented. The algorithm is implemented on the VAPP TSSP environment and tested. It shows that the necessary communication times is reduced, simulating numerical system convergence characteristic is improved and distributed parallel transient stability computation efficiency is enhanced from the running record study of the 1000 bus 200 generator system simulation.