Optimal capacity configuration of urban railway energy storage system considering energy-saving operation effect
Optimizing the design of train operation curve and reasonably configuring super-capacitor energy storage is an effective solution to the high energy loss and significant power impact of urban railway traction power supply sys-tem.The train operation curve will directly determine the current operation status of the train,and change the overall energy consumption of the power supply system by adjusting the efficiency of the motor on the one hand,and influ-ence the optimal capacity configuration of the energy storage by adjusting the power difference between the traction process and regenerative braking process of the train on the other hand.Considering the mutual constraints of the a-bove two factors,this study proposes a comprehensive method for optimal capacity configuration of urban railway ener-gy storage system,aiming at both energy-saving operation and reduction of energy storage capacity.Firstly,the math-ematical model of train operation is used to establish the energy consumption function considering the variation of mo-tor efficiency.Then,the power difference function between traction and regenerative braking is determined consider-ing the energy interaction during multi-vehicle operation.Further,the composite cost function containing fixed time minutes,comprehensive energy consumption of the system,and energy storage capacity is reconstructed,and the op-eration curve is optimized based on an improved particle swarm algorithm.Finally,given that the composite cost function involves different physical quantity,the influence of each economic factor on the optimization objective is studied in depth.The examples show that the operation curve obtained based on the optimization method of this study can significantly reduce the configuration capacity of super-capacitor while saving energy.
energy storage systemscapacity configurationregenerative brakingtraction motor
万方数据
维普
