Matlab符号工具箱在实时电价中的应用  

Application of Matlab's Symbolic Toolbox on Spot Price

作　　者：侯荣升 周明华[1] 

机构地区：[1]江西电力职业技术学院,江西南昌330032

出　　处：《江西电力职业技术学院学报》2008年第2期31-33,共3页Journal of Jiangxi Vocational and Technical College of Electricity

摘　　要：介绍了基于最优潮流(OPF)的实时电价模型以及原对偶内点算法的基本原理。利用Matlab符号工具箱完成了求解原对偶内点算法修正方程过程的符号计算,能够获得系统状态变量修正量的显式符号结果,使得复杂的原对偶内点算法修正方程的形成与求解过程简化为在每次迭代中进行一次简单的代数替换。通过对一5节点系统和IEEE14节点系统的仿真分析后表明,该方法计算时间长,不利于实时电价的在线计算,但编写程序简单,可用来校验一种算法和其他程序的有效性。Spot Price based on the model of optimal flow and the primal-dual Interior point algorithm are presented in this paper. A symbolic calculation is applied in the formation and derivation of the primal-dual interi-or point algorithm＇s modified equation, which applies Matlab＇s symbolic math toolbox. As the symbolic results of system state variables＇ modified value can be obtained before the actual calculation, the formation and derivation of the modified equation are simplified into just substituting the symbolic results with the corresponding numbers at each iteration. The numerical simulations and analysis of 5 -bus system and the IEEE14 -bus system show that the calculation time of the proposed rhethod is too long to adapt Spot Price calculation on line, but the program is simple to edit, which can be applied to check the efficiency of a algorithm and other programs.

关 键 词：实时电价 最优潮流 原对偶内点算法 符号计算 MATLAB 

分 类 号：TM744[电气工程—电力系统及自动化]