基于交替方向乘子法的主动配电网分布式多目标优化调度

发布时间：2018-06-04 12:51

本文选题：主动配电网 + 交替方向乘子法　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：近年来,随着全球化石能源的急剧消耗以及新能源技术的快速发展,各种各样的分布式能源在配电网中的渗透率与日俱增,传统意义上的配电网正逐渐演化为具有调度控制灵活、用户交互性高、能源利用率高等特征的主动配电网。分布式能源的大规模渗透对于配电网的电能质量、运行成本等许多方面都产生了很大影响。所以,为了实现主动配电网中各类分布式能源协调、高效利用,改善配电网的优化调度方法是一个迫在眉睫的问题。为了解决分布式能源渗透率提高后,传统集中式优化调度面临的优化目标选择不灵活、计算效率低、对计算存储和通信等硬件设备要求高等一系列问题,本文提出了一种基于交替方向乘子法(alternating direction method of multipliers,ADMM)的主动配电网分布式多目标优化调度方法,不同分区可以根据实际情况与需求选择不同的优化目标,以期实现灵活、高效的主动配电网优化调度。首先建立主动配电网分布式多目标优化调度模型,包括实时与日前调度两部分,其中各分区根据实际情况分别在运行成本最小、可再生分布式电源消纳率最高、电能质量最好等之中选择一种作为优化目标。然后将约束条件进行凸松弛并引入辅助变量对原模型进行数学变换,从而应用交替方向乘子法对相邻分区间进行交替迭代,实现并行计算。另外,采取异步迭代的计算流程进一步提高计算效率,并应用最优流模式法来解决可能出现的弱环网问题,改善了该方法的适用性。本文基于改进的PGE-69节点配电系统算例对所提模型进行了仿真验证,通过在实时调度与日前调度两种情况下,分别与传统的集中式优化调度方法以及其它的分布式优化方法进行对比。仿真结果表明,本文所提方法在实现主动配电网多区域、多目标的优化调度方面能够取得比较高的综合满意度与计算效率。
[Abstract]:In recent years, with the rapid consumption of fossil energy in the world and the rapid development of new energy technology, the permeability of all kinds of distributed energy in the distribution network is increasing. The traditional distribution network is gradually evolving into an active distribution network with the characteristics of flexible dispatching control, high user interaction and high energy efficiency. The large-scale penetration of distributed energy has great influence on power quality and operation cost of distribution network. Therefore, in order to realize the coordination and efficient utilization of all kinds of distributed energy in the active distribution network, it is an urgent problem to improve the optimal dispatching method of the distribution network. In order to solve a series of problems such as inflexible choice of optimization target, low computing efficiency and high requirement for hardware equipment such as computing storage and communication, traditional centralized optimal scheduling is faced with a series of problems after increasing distributed energy permeability. In this paper, a distributed multi-objective optimal dispatching method for active distribution network based on alternative direction method of multiplier method is proposed. Different districts can choose different optimization objectives according to the actual situation and demand, in order to achieve flexibility. Efficient optimal dispatching of active distribution network. First of all, the distributed multi-objective optimal dispatching model of active distribution network is established, including real-time and pre-day dispatch. According to the actual situation, each district has the lowest operating cost and the highest absorption rate of renewable distributed power supply. One of the best power quality optimization objectives is chosen. Then the constraint condition is convex relaxed and the auxiliary variable is introduced to transform the original model. Then the alternating direction multiplier method is used to iterate the adjacent sub-interval alternately and the parallel computation is realized. In addition, the asynchronous iterative computing flow is adopted to further improve the computational efficiency, and the optimal flow mode method is applied to solve the possible weak loop network problems, which improves the applicability of the method. In this paper, the proposed model is simulated and verified based on the improved PGE-69 node distribution system. In the case of real-time scheduling and pre-day scheduling, the proposed model is simulated and verified. Compared with the traditional centralized optimal scheduling method and other distributed optimization methods. The simulation results show that the proposed method can achieve high comprehensive satisfaction and computational efficiency in the realization of multi-area and multi-objective optimal dispatching of active distribution network.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM73

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