电力系统在线动态安全评价的一种快速数值积分方法

A Fast Numerical Integration Method for Power System on-Line Dynamic Security Assessment

本文提出了一种基于特殊二阶微分方程数值积分的预估──校正法，并利用稀疏向量法和补偿法进行电力系统动态安全评价的快速方法。计算量分析表明，对每一预想事故进行暂态稳定分析所需的积分运算时间不超过一次ＰＱ解耦潮流计算中迭代时间的两倍．６３机和４５机系统的计算结果表明，所提方法准确、可靠，对每一预想事故进行暂态稳定分析的平均时间少于一次ＰＱ解耦潮流计算，具备在线实现动态安全评价的能力．

Based on a Predictor-Corrector numerical integration algorithm for spotal second Order differential equation,and by using the sparse vector method and compensation technique, a fast dynamic security assessment method is presental in the paper. By analyzing the computation burden,the integration time for stability analysis per each contingency does not exceed two times of the iteration time in PQ decoupled load flow solution. Simulation results of 63-machine and 45-machine systems show that the proPOsed method is accurate and reliable enough .and the average CPU time for one contingency analysis is less than that required for one PQ decoupled load flow solution. Therefore,the method is capable of on-line application.