含多微网的配电网优化调度研究

发布时间：2018-06-28 18:35

本文选题：多微网系统 + 协调调度架构　；参考：《湖南大学》2014年硕士论文

【摘要】：随着大量且种类多样的分布式电源或微网群体并入电网，技术、经济等多方面的原因导致电网的调度指令难以快速有效执行，集中单一的调度方式难以适应这一变化。因此，本文从更大范围的互补性出发考虑多微网的协调运行，提出了多微网系统的协调调度架构及策略，并在此基础上建立多微网系统的经济调度模型，协调了微网与微网、电网之间的出力，提高了多微网系统运行的经济性，降低了微网系统内部对储能单元的依赖程度。本文开展的具体研究工作如下：首先，提出了基于智能互动技术的多微网系统的优化调度新思路。根据电网及各微网的运行特性，采用人工智能技术实现电网与各微网的信息交流与能量交互，从而利用更大范围的互补性以减少多个微网出力的不确定性。其次，考虑到多微网中的各个微网既是相互独立又是相互联系，提出了多微网系统的协调调度架构，该架构由微网内部微源协调、微网间协调、多微网与配电网交互三部分组成。其中，，微网间协调是该架构的重要部分，即根据各微网内部电量供需状况以协调各微网间的出力。基于系统协调调度架构，提出针对电网峰平谷时段的多微网系统协调调度策略。然后，根据不同微电源的数学模型，建立以多微网系统运行成本最小为目标的经济调度模型，并结合前述的多微网系统协调调度策略，提出基于粒子群算法的求解方法。最后，对微网系统中可再生能源发电出力和日负荷需求进行模拟，并分别计算比较不考虑含储能单元的单微网单独并网与多微网协调并网、考虑含储能单元的单微网单独并网与多微网协调并网的优化出力结果。仿真结果表明多微网系统协调并网的优化出力比单独并网的更具有经济性。本文通过研究多微网系统的协调调度架构及策略，并应用到多微网系统的优化运行，有利于提高微网系统运行的经济性，并在一定程度上可引导微网系统有序地接入配电网。
[Abstract]:With a large number and variety of distributed generation or microgrid groups incorporated into the power grid, technical, economic and other reasons lead to the grid dispatch instructions are difficult to implement quickly and effectively, centralized single dispatching mode is difficult to adapt to this change. Therefore, in this paper, the coordinated operation of multi-microgrid system is considered from the point of view of wider complementarity, and the coordinated scheduling architecture and strategy of multi-microgrid system are proposed. On this basis, the economic scheduling model of multi-microgrid system is established, and the microgrid and micro-grid are coordinated. The power generation between the power grids improves the economy of the operation of the multi-microgrid system and reduces the dependence of the micro-grid system on the energy storage unit. The research work in this paper is as follows: firstly, a new idea of optimal scheduling for multi-microgrid systems based on intelligent interactive technology is proposed. According to the operation characteristics of power grid and microgrid, the artificial intelligence technology is used to realize the information exchange and energy interaction between power grid and microgrid, so as to reduce the uncertainty of power generation of multiple microgrids by taking advantage of the complementarity in a larger range. Secondly, considering that each microgrid in the multi-microgrid is not only independent but also interrelated, the coordination and scheduling architecture of the multi-microgrid system is proposed, which is coordinated by the microsource within the microgrid and the coordination between the microgrids. The interaction between multi-microgrid and distribution network is composed of three parts. The coordination between microgrids is an important part of the architecture, that is, according to the supply and demand of electricity in each microgrid to coordinate the output of each microgrid. Based on the system coordination scheduling architecture, a coordinated scheduling strategy for multi-microgrid systems during peak and valley periods is proposed. Then, according to the mathematical models of different micro-power sources, the economic scheduling model with the minimum operating cost of the multi-microgrid system is established, and the Particle Swarm Optimization (PSO) algorithm is proposed to solve the problem in combination with the above-mentioned coordinated scheduling strategy for the multi-microgrid system. Finally, the generation capacity and daily load demand of renewable energy in microgrid system are simulated, and the single microgrid and multi-microgrid coordinated grid-connected without energy storage unit are calculated and compared respectively. In this paper, the optimization results of single microgrid and multi-microgrid coordinated grid-connected with energy storage unit are considered. The simulation results show that the optimal output force of multi-microgrid system is more economical than that of single grid-connected system. In this paper, the coordinated scheduling architecture and strategy of multi-microgrid system are studied and applied to the optimal operation of multi-microgrid system, which is helpful to improve the economy of microgrid system operation, and to a certain extent can guide the micro-grid system to connect to the distribution network in an orderly manner.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM73

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