互联电网的直流最优潮流分解算法研究

研究了大系统互联电网的最优潮流优化策略,基于部分对偶理论分析了电网分区的分解协调模型,提出了一种基于直流最优潮流模型的互联电网多区域分解最优潮流并行求解算法,将一个大的电网互联系统分解成多个区域子问题,每个区域子问题是个典型的二次规划问题,使用直流最优潮流模型来求解互联电网的最优潮流分布,讨论了分区优化收敛条件。通过交换输出电价和边界节点相位角,完成区域间的信息交换。使用上述分解算法对IEEERTS-96算例的多个互联区域进行了分析,结果表明本文算法是一种有效的求解算法,适合大区电网互联后在线分布式动态OPF计算。在电力系统有极大的应用前景。

Research on Decomposition Algorithm of DC Optimal Power Flow in Large Scale Interconnection Power Grids

This paper investigated an optimal method of optimal power flow in large scale interconnected power grids.A decomposition collaborative model based on partial duality is analyzed,and a parallel algorithm based on DC optimal power flow model is presented in multi-region decomposition of interconnected power grids.The OPF computation of large power grid is decomposed into multi regions subproblems,which is a quadratic programming problem used to solve a DC optimal power flow.The condition of multi-region optimal convergence is discussed.The information of interchanging between regions is export price and boundary nodal bus phase angle.The IEEE RTS-96 systems with two,three and four interconnected regions are studied to illustrate the effect of the proposed approach and prove to have a great future in real time OPF computation of interconnected power system.