基于交替方向乘子法的电力系统完全分布式动态经济调度方法

Fully distributed dynamic economical dispatching method for power system based on alternating direction multiplier method

中文关键词  电力系统  动态经济调度  分布式算法  ADMM

英文关键词  power system  dynamic economic dispatch  distributed algorithms  ADMM

中文摘要

      本文基于交替方向乘子法(alternating direction multiplier method, ADMM)提出了一种完全分布式的跨区域电 力系统动态经济调度方法. 其中的经济调度模型以整个系统的运行成本最小为目标, 并满足各种系统运行约束. 为了实 现模型的分布式求解, 本文利用交替方向乘子法将各区域之间的联系解耦, 将整个系统的大型优化问题分解为各个区域 内部的子优化问题, 通过迭代求解每个区域的子问题即可得到整个系统的最优解. 进一步地, 本文算法取消了负责乘子 更新的数据中心, 实现了完全分布式的调度策略. 同时, 为了兼顾电力系统中时间断面之间的紧密联系, 本文的经济调 度模型采用了多时段优化方法. 最后, 本文对基于IEEE标准测试系统的3区域互联系统算例进行了分析, 验证了本文的 调度策略的有效性.

英文摘要

      In this paper, a fully distributed cross-regional power system dynamic economic dispatching method is proposed based on the alternating direction multiplier method (ADMM). The economic dispatching model is to minimize the operation cost of the whole system, while satisfying all kinds of system operational constraints. In order to solve the model with distributed algorithm, the alternating direction multiplier method is applied in this paper to decouple the links between the regions, which decomposes the large-scale optimization problem of the whole system into sub-optimization problems in each region, and the optimal solution of the whole system can be obtained by solving the sub-problems of each region iteratively. Furthermore, the coordinator for updating the multipliers is canceled in the proposed algorithm, which realizes the fully distributed dispatch strategy. Meanwhile, in order to take into account the close relationship between the time periods in the power system, the economic dispatching model in this paper adopts the multi-period optimization method. Finally, this paper analyzes the example of 3-region interconnected system based on IEEE standard test systems, and verifies the effectiveness of the proposed strategy.