With a light truck equipped with power-following fuel cell as the research object,a power-following energy management strategy of a fuel cell based on wavelet transformation has been constructed combining the frequency characteristics of the vehicle power demand under typical driving cycles using wavelet analysis method.The low frequency component of the vehicle power demand obtained after wavelet transform was allocated to the fuel cell,so as to improve the fluctuation of the fuel cell output power.In addition,the wavelet decomposition level was dynamically adjusted to regulate the power following degree automatically,to ensure the power supply of the vehicle under various power battery charge-discharge capacity and vehicle power requirement.The simulation result shows that the power-following allocation strategy based on wavelet transform can meet the vehicle power demand under typical driving conditions,and the SOC can be kept in the reasonable range,the power output fluctuation of the fuel cell has been decreased by 29.8％,in addition,the hydrogen consumption has been reduced by 1.5％.
维普
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