大规模超高压交直流系统最优潮流的研究

The Optimal Power Flow of the Large-Scale Extra High Voltage AC/DC Power Systems

建立了电力系统大规模超高压交直流系统最优潮流联立求解的数学模型,将交流系统和直流系统统一在一个模型里求解,避免了传统的交替计算或功率等价法的不确定性,直接反映直流网络特征和交直流变量之间耦合关系,寻求最优解;同时提出了基于现代内点理论的求解算法,并对节点数118~7060等多个大规模测试或实际系统的仿真计算,表明本算法具有计算时间短、收敛性好等特点,是电力系统主要的网络分析和优化工具之一;亦可作为电力系统底层应用模块,为其他高级应用软件提供数据支持。

A novel mathematical model for the large-scale extra high voltage AC/DC systems is presented in this paper.This general mathematical model consists of AC system and DC system,which can avoid the uncertainty of traditional alternate calculation and power equivalence method and directly reflect the coupling relationship between the feature of DC network and AC/DC variables.The interior point method for solving this model is also proposed.Extensive numerical simulations on systems with 118 to 7060 nodes have shown that this method is a good analysis and optimizing tool of electric power network due to its fast calculating speed and easy convergence,and it is also a fundamental application module that can provide data for the advanced software of power system.