Design Of Energy-saving Oriented Case Database Construction Of Metro Network Diagram

With the rapid development of economy,people's travel demand also increases.Urban rail transit network has been widely used all over the world because of its large passenger volume,safety,efficiency,fast and punctual.However,with the development of urban rail transit network,the energy consumption of urban rail transit network is huge and growing rapidly.It not only brings high operating costs and high carbon emissions,but also brings great pressure to operation management departments.Therefore,it is of great significance to study how to reduce the energy consumption of urban rail transit network operation for national energy saving and emission reduction goals.This research group has accumulated a large number of urban rail transit network operation cases.Through analysis,it is found that for the established urban rail transit network,when the same hardware conditions are allocated,and under the same external conditions,when different urban rail transit network operation charts are adopted,there exists a "total energy consumption is the lowest".Optimal Operation Diagram".However,it takes several days to calculate an optimal operation diagram using the rail transit electrical simulation system,which obviously can not meet the real-time requirements of urban rail transit network operation.In the case of sudden emergencies,how to quickly and effectively get the "optimal operation diagram of urban rail transit network" with "the lowest energy consumption" is the main objective of the study.This paper analyses the unexpected situation of urban rail transit network operation and the factors affecting energy consumption,puts forward the concepts of dynamic updating of urban rail transit network line weight,the importance of network nodes and the capacity of transfer nodes,and gives the calculation methods of the three concepts.The case of urban rail transit network operation diagram is represented by frame representation method.Each case in the case base consists of the external conditions of urban rail transit network operation,the operation chart of the target line with the lowest energy consumption under the external conditions,the operation chart of the associated line.In order to overcome the shortcomings of single subjective method or objective method,a comprehensive weight adjustment method of conditional information entropy method based on rough set is proposed to solve the problem of large difference in dimension and magnitude of attributes in case base.At the same time,combined with the case retrieval method based on two-stage variableweight grey relational degree,the problem of low accuracy of case retrieval caused by the difference of attribute magnitude is solved.In this paper,the prototype of case base system is designed,and the functions of each module are elaborated in detail.The main work done in this paper and the inadequacies of innovation are elaborated.