Study On Source And Load Coordinated Operation And Control Strategy In Microgrid

As an effective method to solve the new energy utilization, microgrid combines distributed generation and load, make full use of the advantages of distributed generation, and reduce the adverse effects caused by the distributed generations connected to the grid. However, in terms of the development direction of microgrid, only relying the expansion of installed capacity to satisfy the increasing load demand, not only can bring enormous pressure to the construction investment of microgrid, may also cause huge waste of renewable energy.Based on the implementation of demand response projects, this paper proposes the basic strategy which allows demand side participates in the operation of system, and it improves the mechanism of source and load coordinated operation. The strategy make detailed analysis for the process of source and load coordinated operation and make a presentation on the priorities of each stage formulate from the perspective of system and customer respectively. On the basis of the foregoing research, Further studies are organized as follows.The microgrid demand side control mode is proposed, and The paper adopts distributed coordinated control method based on MAS to ensure the effective execution of the strategy. This strategy can realize the aim of power terminal participate to the system operation. Based on the mode, taking the minimized fluctuation of load curve and the maximized customer satisfaction as objective function, a multi-objective coordinated scheduling model is established.A customer satisfaction evaluation system is proposed in this paper, it based on the customer-centered optimization concept of microgrid. The system measures the satisfaction of customer from comfort index and time index, and it ensures the user to be the ultimate beneficiaries in demand side control process, in order to arouse the enthusiasm of customer to participate the operation of microgrid.Control strategies of coordinated operation between the source and load of the microgrid are studied in this paper, including the distributed generators, the interactive loads and the energy storage devices. Reliable and economic operation of microgrid is achieved on the basis of real-time dynamic balance of the microgrid power, using the fluctuation limit of interactive power between micro and public grid as the constraint and the minimizing operating cost of microgrid as the goal.