Adaptive Instantaneous Equivalent Energy Consumption Optimization of Jydrogen Fuel Cell Hybrid Electric Tram

The locomotive load of urban rail transit has the characteristics of wide spatial distribution, strong impact and strong pulsation. As a result, the ECMShas the problems of poor condition adaptability and robustness. Therefore, a new instantaneous optimization method of adaptive adjustment of equivalent energy factor is proposed. A three-dimensional transition probability matrix considering the time-varying speed, acceleration and road slope is constructed. The working condition sequence is obtained by Monte Carlo sampling method, and the error of instantaneous characteristic parameters is analyzed. The mathematical model of adaptive adjustment of equivalent energy factor with the SOC of lithium battery is deduced to correct the evaluation deviation of electric hydrogen energy conversion. Build a semi-active simulation platform for 300 kW tram power system, and apply the traditional ECMS strategy and state machine strategy online respectively. The results show that the transient error of the proposed method is less than 1.2 % and the steady-state error is less than 0.2 %, which is representative and universal for the high-precision deduction of the actual driving scene; The proposed energy management strategy solves the problems of large amount of calculation, high complexity of control structure, and has broad engineering application prospects. © 2023 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.