大规模交直流混联电网在线静态安全分析

南方电网总调能量管理系统(EMS)采用了先进的分布式建模技术,其在线静态安全分析需要对包括五省区220kV以上的交直流混联电网大模型进行计算,普通的潮流开断或补偿法难以满足南方电网大模型计算的效率要求。文章采用了基于图上作业的稀疏矢量和因子表修正技术来解决这一问题。图上作业法的稀疏矢量将开断计算工作量缩小到点集的路集上。因子表修正则利用递归与递推方法来减少因子表重新分解的工作量,加快计算速度。与EMS全潮流计算和BPA的对比计算表明,所提出的算法是合理的,且已在南方电网总调EMS有效地运行了两年多。

Online Static Security Analy-sis of Large-Scale Hy-brid AC-DC In-terconnected System

Since China Southern Power Grid (CSG) em-ploys the online distrib-uted model-merge tech-nology for its Energy Management Sys-tem(EMS), the online static security analysis of CSG should take into ac-count consistent model for its whole 550 kV/220 kV AC-DC systems. Never-theless the traditional online static security analysis method, such as open/close loop power flow calculation or com-pensation algorithm, can-not satisfy the computa-tion efficiency for the large consistent model of CSG. This problem is solved in this paper with a method to combine graphics processing sparse vector method and fast admittance matrix modi-fication algorithm. The graphics processing sparse vector method reduces calculation cost by con-centrate open/close loop power flower calculation on the route cluster of point set. The fast admit-tance matrix modification accelerates calculation speed by applying recur-sive and iterative algo-rithm. The proposed method is reasonable in comparison with the power flow calculation in EMS and BPA programs, and its software has effec-tively operated over two years in the EMS of CSG dispatching system.