Research On Microgrid Economic Scheduling Based On Multi-Agent Consistency

Building a new power system with new energy as the main work is one of the important means to solve the energy crisis,improve the environmental pollution,and achieve the goal of "carbon peak" and "carbon neutral".In the construction and development of new power system,new energy will gradually occupy the position of installed main work.Distributed generation technology provides the main technical support in new energy generation,and develops rapidly in recent years.Microgrid effectively integrates the distributed power generation unit through the communication network and realizes the cooperative control of the new energy power generation unit.Therefore,the cooperative control and stable economic operation of microgrid composed of distributed power sources are particularly important.Due to the differences in the capacity and cost of each distributed power generation unit,the output of each distributed power generation unit needs to be adjusted during the operation of microgrid to optimize the operating state and power generation cost of the system,so as to give full play to the distributed power generation capacity and improve the economy of microgrid operation.Therefore,it is of great practical value to study the economic dispatching of microgrid.This paper around the micro grid optimization scheduling of the subject,to aim at the lowest cost of power generation is studied based on the distributed multi-agent consistency of micro grid power economic dispatch,compared the first-order and second-order consistency algorithm in the micro grid application performance,and event triggering mechanism is used to optimize the communication way,thus saving communication bandwidth,accord with the requirement of economy.Firstly,the research status of microgrid economic dispatching is summarized,and the advantages and development trend of distributed economic dispatching are pointed out.Then,the multi-agent consistency protocol,stability criterion and economic dispatching model of microgrid are introduced to provide theoretical basis for the research topic.Secondly,aiming at the distributed economic dispatching problem of microgrid with economy as the goal,an economic dispatching model based on the first-order consistency of multi-agent is built.Taking the micro-growth rate of each generating unit as the consistency variable,the model is solved by Lagrange number multiplication,and the distributed economic dispatching is realized.On this basis,the second order consistent economic scheduling model is further designed to improve the convergence speed of distributed economic scheduling.The stability of the above models is evaluated by Lyapunov stability theory,and the validity of the above analysis is verified by MATLAB example simulation.Finally,in order to reduce the communication burden of microgrid,an event triggering mechanism is introduced based on the economic scheduling model based on consistency.Through lyapunov stability theory analysis,it is ensured that the micro-grid can still achieve micro-rate consistency even after the introduction of the designed trigger function,so as to minimize the power generation cost of the microgrid and avoid Zeno behavior.MATLAB example simulation verifies that compared with periodic sampling,event triggering mechanism can save a lot of communication resources,and second-order consistency still has better convergence performance under event triggering mechanism than first-order consistency.