电动拖拉机双电源并联控制研究

Research on Parallel Control of Dual Power Supply for Electric Tractor

电动拖拉机具有结构简单和节能减排等优点,但现有电动拖拉机作业时采用单一动力电池能源,存在续航时间短的问题。为了提高电动拖拉机长续航供电能力,提出了一种基于下垂控制的直流双电源并联均流联合供电方案,利用MatLab/Simulink搭建了系统模型。仿真试验表明:单电源可以实现升压稳压控制;基于下垂控制的双电源并联均流能够实现双电源的电流均流;当切换不同功率负载时,系统电压随功率增加按比例下调,验证了该方案的可行性。

Electric tractors have the advantages of simple structure,energy saving and emission reduction.However,the existing electric tractors use a single power battery to operate with short endurance.In order to improve the long-term power supply capability of electric tractors,this paper proposes a DC double power parallel current sharing joint power supply scheme based on droop control,and uses MatLab/Simulink to build the system model.In the aspect of simulation test,the single power supply can realize the boost and voltage stabilization control.The current sharing of dual power supply based on droop control can realize current sharing of dual power supply.When switching different power loads,the system voltage decreases proportionally with the increase of power,which verifies the feasibility of the scheme.