Economic Dispatch Of Multi-microgrid Systems With Incomplete Information Scenarios

With the impact of environmental issues and the gradual depletion of fossil energy reserves,renewable energy power generation technology with the advantages of clean,environmental protection and abundant resource reserves has been fully developed in recent years.However,due to the scattered resources and the inability to freely regulate the output power,it has led to abandonment.Wind abandonment is very serious.Connecting distributed renewable energy to the microgrid and using the control technology of the microgrid to flexibly realize its grid-connected or off-grid island operation is an effective way to solve the problem of large-scale grid connection of renewable energy.At the same time,with the development of microgrid technology,more and more microgrids will appear on the user side,and cooperation between microgrids with complementary characteristics will gradually form a multi-microgrid system.How to reasonably coordinate the economic dispatching plans of these microgrids is one of the important problems in solving the economic operation of multi-microgrid systems.However,the variability of the operating environment also causes system operators to often need to make economic dispatch decisions in an environment with incomplete and insufficient information.By constructing various scenarios with incomplete information and improving the existing economic dispatch model,it is of great significance to promote the consumption of renewable energy and the economic operation of the system.In view of the impact of incomplete information scenarios on the economic dispatch of multi-microgrid systems,this paper studies the economic dispatch models of singlemicrogrid and multi-microgrid systems in different scenarios such as uncertain renewable energy output information,link interruption failure,false information interaction,etc.,In order to promote the use of renewable energy and improve the economics of system operation.The specific work is as follows:First of all,for a single microgrid with a high proportion of renewable energy,because the output power of distributed renewable energy units is restricted by natural environmental factors,its uncertainty has an impact on the economic dispatch of the microgrid.Therefore,for the economic dispatch model of this microgrid,uncertainty modeling is carried out through the idea of robust optimization,and a three-layer robust economic dispatch mathematical model is obtained,and the C&CG algorithm is used to decompose and simplify the model to solve it.The comparative analysis of calculation examples verifies the effectiveness of the robust economic dispatch method and the economics of the economic dispatch result.Secondly,for the multi-microgrid system formed by multiple single microgrids,a multi-microgrid economic dispatching model is established.Since each sub-microgrid is relatively independent,a distributed multi-microgrid economic dispatching model is established through the alternating direction multiplier method.At the same time,considering that the abnormal information interaction between the sub-microgrids will affect the economic dispatch of the multi-microgrid system,a mathematical model of link interruption failures is established,and an emergency transaction model between the submicrogrids is introduced to ensure the passage of each sub-microgrid.Price trading,after the occurrence of failures,continue to maintain the economy of system operation,and establish a profit index to quantitatively analyze the impact of link interruption failures on the economic dispatch of multi-microgrid systems.The comparative analysis of calculation examples verifies the effectiveness of the distributed multi-microgrid economic dispatch model and its superiority in the scenario of link interruption failure.Finally,since the exchange of false information between sub-microgrids will affect the economic dispatch of the multi-microgrid system,false information is introduced into the economic dispatch model of the multi-microgrid,and a supervisory mechanism for scenarios of false information interaction is proposed.Control interactively.Through calculation examples,the harm of false information to the economic dispatch of multimicrogrid systems is analyzed,and it is verified that the false information supervision mechanism can effectively contain false information and ensure a benign environment for system operation.