基于负荷峰谷变化的微电网二层协调控制研究

Research on operation control strategy in two layers for micro-grid based on load peak and valley

交流微电网是集成分布式发电单元和储能单元的有效途径。为了实现微电网并网稳定运行,提出了一种风光柴储交流微电网的二层控制策略。建立了分布式发电单元、储能单元以及柴油发动机的数学模型。给出了风光柴储在并网运行期间的本地控制策略。为了实现微电网削峰填谷作用,采用由以太网、高带宽通信、监控系统以及中央协调控制器构成上层控制系统,分别给出了峰谷期间储能系统和柴油发动机的协调控制方法。最终,通过仿真软件搭建了系统仿真平台,分别对两种运行模式进行了仿真研究,仿真结果验证了本文提出方法的可行性和有效性。

AC micro grid is an effective way to integrate distributed generation units and energy storage units. In order to realize the stable operation of microgrid, a two layer operation control strategy is proposed for AC microgrid including wind power, photovohaic system, and diesel generator and battery storage. The mathematical model of distributed generation unit, energy storage unit and diesel engine is established and the local control strategies also are given in grid-connected operation. In order to realize microgrid peak load shaving function, an upper control system is composed of Ethernet, high bandwidth communication, monitoring system and central coordination controller is used, and the coordination control method for energy storage system and diesel engine is given. Finally, the simulation platform is built by the simulation software, simulation research on two operation modes are carried out respectively. The simulation results verify the feasibility and effectiveness of the proposed method in this paper.