基于双向迭代的电力系统并行暂态仿真算法

为提高电力系统暂态仿真的速度，结合双向迭代技术，提出了一种适合大规模电力系统的并行暂态仿真算法．利用电力系统区域结构化的特点，将电力网络划分成以树形分层结构相联的子网，该结构中同层子网相互独立，只和上层子网存在接口关系．进行暂态仿真时，通过由底层子网到顶层主网的前向简化和由顶层主网到底层子网的后向回代来实现对牛顿法线性增量方程的求解在我国山西电网和东北电网上对算法进行了验证，与BPA的结果比较说明了本算法保持与其他算法在计算结果上的一致性；通过在东北电网上计算效率的分析，说明该算法能有效地缩短暂态仿真的计算时间．

Parallel Transient Simulation Method for Power System Based on Bi-Directional Iteration Approach

Taking advantage of the bi-directional iteration approach, a parallel transient simulation method for largescale power system was proposed to effectively improve the speed of transient simulation. Based on the inherent regionality characteristics of power system, the electrical network was represented by a group of sub-networks connected by the hierarchical tree structure. In this tree structure, the sub-networks in the same level were independent to each other, and only connected with the sub-networks in the upper levels. During the transient simulation, the forward reduction and backward evaluation approach was utilized to calculate the correction factors in Newton iteration by the tree-traversing procedure. Case studies are performed on the Shanxi power system and the Northeast power system in China. The results show that rationality of this algorithm is verified by comparing with the results of BPA software, and the efficiency is indicated by the time-consumption analysis on the Northeast power system.