| Micro-grid is a single controllable independent power generation system which consists of distributed generation systems, energy storage devices, load cells and control devices. As a new type of electricity generation by using renewable energy power, micro grid technology has received extensive attention of the experts at home and abroad, and is listed as an important part of the smart grid construction. However,how to coordinate the relationship between the micro grid subsystems, improve the economic benefits and environmental benefits of the micro grid operation, has become the difficult point in micro grid technology.This article mainly aims at the coordinated control strategy and economical operations of an autonomous running micro-grid. Starting from the characteristics of distributed generation systems in the micro-grid, this paper’s main research tasks are summarized as follows:1. Taking the micro-grid system comprised of wind turbine generators, PV generators, and batteries as the research object, operation characteristics and important parameters of the system were analyzed. Then use MAS technology designed the overall structure of the micro-grid coordinated control system by putting each subsystem into an independent agent unit.2. This paper proposes a new micro-grid coordinate control strategy that based on power prediction in time dimension. Then carry out a simulation to verify the proposed control strategy through a stand-alone micro-grid.3. The micro-grid MAS coordination control system is designed and implemented on the MCGS software platform by combining the proposed control strategy and the MAS technology. And finally the system is run through software simulation data.The research achievements in this paper not only ensure the flexible and stable operation of the micro-grid system, but also has a certain reference and guidancesignificance for improving the technical level of micro-grid system’s power balance and continuous operation. |
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