The study of energy management strategy is the core technical issue to improve the fuel economy of hybrid tractor.In this paper,the tandem hybrid tractor with rear wheel-side drive is taken as the research object,and its hybrid power system configuration is analyzed,the parameters of the main components of the power system are determined,and the energy flow of different operating modes is analyzed;an energy management strategy based on MA-ECMS is designed,and the hybrid power system model is verified to have a better effect of following the working conditions through simulation;The initial SOC values of 0.2,0.6 and 0.8 were set for simulation verification to analyze the energy management effect under different battery states.The results show that under different initial SOC values,the energy management strategies are able to achieve accurate switching of the working mode of the series-connected hybrid tractor and reasonable distribution of the power source power,and have better energy management effects.Taking the case of the initial SOC value of 0.6 as an example,the change of SOC value and fuel consumption of the energy management strategy before and after the optimization of the monkey swarm algorithm are compared.Before optimization,the ΔSOC is 0.007 2,and the fuel consumption is 6.43 L/100km;after optimization,the ΔSOC is 0.000 9,and the fuel consumption is 6.11 L/100km.The results show that the energy management strategies before and after optimization can achieve the dynamic balance of the SOC,and the dynamic balance of the SOC after optimization is more effective;and after optimization,the system's fuel consumption decreases by 0.32 L/100km,and the fuel saving rate is better.100 km,with a fuel saving rate of 5％and better fuel economy.
维普
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