Scheduling Design Of Distributed Energy Storage System For Micro-grid

The intermittent nature of distributed power sources such as photovoltaics and wind power,as well as the randomness of load demand,pose new challenges for micro-grid power balance.The introduction of energy storage systems can effectively solve the power imbalance problem of the micro-grid.Compared with the traditional centralized energy storage,there are shortcomings such as line loss and investment pressure.Distributed energy storage has become a research hotspot because of its flexible control,small transmission loss and wide geographical distribution.In this paper,the scheduling problem of distributed energy storage systems with constraints is studied.Under the premise of satisfying the system power balance,the charging and discharging power of each distributed energy storage unit is reasonably scheduled,and the total power loss during system charging and discharging is minimized.The main work is as follows:(1)For the distributed energy storage scheduling problem,a distributed energy storage scheduling algorithm triggered by events in variable topology is proposed.Compared with the traditional distributed communication,the periodic communication is replaced with the communication on some sampled time instants with no Zeno-like behavior.Eliminate unnecessary continuous communication,reduce energy loss,and ensure that the system charging power reaches the optimal value to achieve optimal scheduling.(2)For the distributed energy storage scheduling problem,a finite time scheduling algorithm is proposed.The algorithm ensures that the incremental cost of each energy storage unit converges to a consistent value within a finite time while satisfying the micro-grid power balance constraint and the energy storage unit charging power limitation constraint,and the charging power also reaches an optimized value within a limited time.To achieve the goal of minimizing system operating losses.(3)For the distributed energy storage scheduling problem,a scheduling software was designed,which can implement scheduling,monitoring and other functions,which is convenient for the operation and management of micro-grid.