Energy Management Strategy of Hydrogen Fuel Cell/Battery/Ultracapacitor Hybrid Tractor Based on Efficiency Optimization

With the application of new energy technology, hybrid agricultural machinery has been developed. This article designs a tractor management method to solve problem high consumption caused by significant load fluctuation in field operation. first analyzes characteristics hydrogen fuel cell, power battery, and ultracapacitor system for tractor. Second, strategy (EMS) multi-layer decoupling control based on Haar wavelet logic rule is designed realize high-frequency, low-frequency, steady-state signals demand power. Then, EMS redistributes decoupled each source. Finally, hardware-in-loop simulation experiment was carried out through model. The results show that, compared with single-layer strategies such as fuzzy power-following control, can allocate more reasonably, efficiency cell highest. average increased 2.87% 1.2%, respectively. Furthermore, equivalent reduced 17.06% 5.41%, respectively, within experimental cycle. It shown that considering improve vehicle economy meeting demanded whole load.