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基于自适应步长ADMM的直流配电网分布式最优潮流

时间:2017-9-2 14:55:53 点击:

  核心提示:基于自适应步长ADMM的直流配电网分布式最优潮流...
直流配电网的发展前景广阔,其最优潮流(OPF)问题关系到电网经济运行,具有重要的工程意义。针对放射状直流配电网,以二阶锥规划(SOCP)凸松弛理论为基础,建立了考虑电压、电流、功率约束的SOCP-OPF凸规划模型,并提出一种基于交替方向乘子法(ADMM)的分布式最优潮流计算方法,以解决传统集中式优化方式面临的诸多难题。相比已有研究,该方法在各节点配置计算单元,无需全局协调或分层分区,利用相邻主体间少量的信息传递即可通过并行计算得出全局最优解;优化模型中考虑了配电线路传输电流限制,约束条件更全面;计算方法中设计了自适应步长调整机制,计算效率较高。IEEE 33节点和IEEE 123节点的算例分析验证了所提算法的准确性和良好的收敛性。 The development trend of DC distribution network is broad, and its optimal flow (OPF) problem is related to the economic operation of power grid, which has important engineering significance. A SOCP-OPF convex programming model considering voltage, current and power constraints is established based on the second-order cone programming (SOCP) convex relaxation theory for radial DC distribution networks. A method based on alternating directional multiplier method (ADMM) ) Distributed optimal power flow calculation method to solve the traditional centralized optimization methods face many problems. Compared with the existing research, this method allocates the computing unit at each node, without the need of global coordination or hierarchical partitioning. The global optimal solution can be obtained by parallel calculation using a small amount of information transfer between adjacent subjects. The transmission line is limited and the constraint condition is more comprehensive. The adaptive step size adjustment mechanism is designed in the calculation method, and the calculation efficiency is higher. The analysis of IEEE 33 nodes and IEEE 123 nodes verifies the accuracy and good convergence of the proposed algorithm.

作者:基于自适应步长ADMM的直流配电网分布式最优潮流 来源:基于自适应步长ADMM的直流配电网分布式最优潮流
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