Optimal Scheduling And Economic Analysis Of Distributed Energy Resources

With the construction of a high proportion of renewable energy grid,a large number of microgrids have been established.With the increasing number of complex microgrids with several or dozens of distributed generation units,how to effectively coordinate multiple microgrids and how to flow energy have become a hot issue.The active distribution network is connected with many microgrid clusters,and plays an important role in the energy dispatching.Nowadays,the energy scheduling of micro grid has become a key problem in the energy optimization scheduling of active distribution network.Therefore,this paper will adopt a multi-agent hybrid interconnection mode of micro grid energy optimization dispatching method to realize the energy optimization dispatching of active distribution network.First of all,this paper starts from the structure of active distribution network and the research status at home and abroad,and introduces the current optimal dispatching status of active distribution network and the existing hot issues.The basic structure of a single micro grid and the interconnection structure of micro grid and active distribution network are explored.The mathematical models and cost functions of several distributed generation units in the current microgrid structure are listed to provide a research basis for the establishment of energy management units based on agent system in the following chapters.Subsequently,in the control structure based on multi-agent system,multi-agent system with single connection mode cannot meet the control requirements between active distribution network and micro-grid cluster,between micro-grid and micro-grid,and between micro-grid and distributed generation unit.A multi-agent interconnection system with a hybrid control structure is adopted.Hierarchical control interconnection is adopted between active distribution network and micro grid cluster,distributed interconnection is adopted between micro grid and micro grid,and hierarchical interconnection is adopted within micro grid.At the same time,the objective function and constraint function are set up for the distributed generation unit within the microgrid,and the cost function is set up for the microgrid.A single micro grid under a single agent will consider the operation of other micro grids connected with its communication and carry out energy scheduling,which solves the disadvantages of a single connected multi-agent system.Secondly,this paper aims at the highest profit and the lowest environmental cost of the power grid company to carry out energy optimization dispatching among the microgrids.By using a pseudo-annealing genetic algorithm to optimize the game relationship among agents,three different control methods are given.In order to further verify the optimization.comparison under different methods,simulation experiments were carried out in the IEEE33 node topology structure.The simulation results show that in the multi-agent control structure,not only communication interconnection but also energy exchange is necessary between microgrids.The three control methods with the above methods can effectively reduce the environmental cost and increase the income of power grid companies.Finally,this paper summarizes the work of the full text,and the future research work.