基于交替方向乘子法的电力系统分散式经济调度

现代电力系统中分布式电源特性各异,数量越来越多且接入具有分散特点,传统的集中式经济调度方法将面临计算负担大、通信复杂以及灵活性不足等限制。鉴于此,文中综合考虑了风电功率波动特性和分布式电源的动态模型及其综合发电成本,提出了一种基于交替方向乘子法的电力系统分散式经济调度方法。该方法在每次迭代过程中仅需收集系统净负荷及分布式电源平均有功功率,即可实现每台分布式电源有功功率最优值的分散式独立求解。最后,利用MATLAB/Simulink搭建了含有多个分布式电源的配电网系统,在风电功率波动和负荷实时变化的情况下对所提方法进行测试,通过与传统集中式经济调度方法的比较验证了所提分散式经济调度方法的准确性和有效性。

Decentralized Economic Dispatch for Power System Based on Alternating Direction Method of Multipliers

As more and more distributed generators(DGs)are connected to the modern power systems in a distributed manner, the conventional centralized economic dispatch approach has limitations such as heavy computational burden, high communication complexity and lack of flexibility. Therefore, this paper proposes a decentralized economic dispatch approach for power system based on the alternating direction method of multipliers(ADMM), which comprehensively considers the fluctuation characteristics of wind power, the DG dynamic model and its generation cost. In each iteration of the proposed approach, it only needs to collect the whole system net load and the average active power of DGs, thus all DGs could independently seek the optimal solution of active power in parallel. Finally, a distribution network consisting of multiple DGs is tested in MATLAB/Simulink to validate the performance of the proposed approach in the case of wind power fluctuations and real-time load changes. Comparative results with the conventional centralized economic dispatch approach have confirmed the accuracy and validity of the proposed approach.