Research On Optimal Utilization Of Metro Regenerative Braking Energy Based On Trains Coordinated Operation

With the progress of urbanization,China's major cities are actively joining the wave of urban rail transit construction,which is bound to give birth to a huge demand for energy.Because of this,it becomes a hot issue to research how to reduce the energy consumption of train operations.The regenerative braking energy is huge;the utilization rate is low;and the prospect of recycling is prosperous.People are taking it as the starting point to study the energy saving of rail transit.Under the background,in order to improve the utilization of regenerative braking energy,the paper studied the optimization of regenerative braking energy of subway.Firstly,the research status of train energy saving at home and abroad,and the shortcomings of existing energy conservation research were discussed.Thus the direction of research is determined.The theoretical basis of the regenerative braking energy optimize utilization were analyzed.Then it is pointed out that the key to the optimization of the regenerative braking energy is the cooperation of the train starting braking condition,and the approach is to optimize the train diagram.Secondly,the dynamic analysis is carried out,and the model of train traction calculation is established.The operation strategy is improved,and the traction algorithm design and human-computer interaction interface design are carried out.In the improved operation strategy,energy saving vertical section inertia acceleration is taken full use,which shortened the time of train traction and reduced the traction energy consumption.Thirdly,based on the single train control strategy,overlapping acceleration model is proposed to optimize utilize the regenerative braking energy.The overlapping acceleration model is based on the theory of overlapping time,but avoided the drawbacks of the overlapping time model for repeated modeling of different situations.The model is solved by the simulated annealing algorithm with strong robustness and global optimization characteristic.Finally,the improved traction calculation algorithm and the overlapping acceleration model are used in the practical case to optimize the train scheduling scheme.The results show that the proposed model can improve the utilization rate of regenerative braking energy,thus verifies the feasibility and applicability of the model.At the end of the paper,the research results are summarized,and the next research work is prospected.