针对无人飞行器电源系统质量及功率波动问题,文中首先提出在无人飞行器电源系统中采用三端口拓扑,简化电路,实现无人飞行器轻质高效;其次,对太阳能电池阵与储能电池组成三端口供电系统的工作方式及控制策略进行了分析,通过采用功率支路复用及不同控制策略,实现太阳电池阵调节和储能电池组充放电控制,并保持飞行器母线电压稳定;然后,针对无人飞行器脉冲载荷问题,提出功率波动抑制设计方法,通过计算功率波动抑制控制器增益和储能电容容量,实现了功率波动抑制的目的;最后,通过仿真结果验证了在长脉宽工作模式下无人机脉冲载荷供电系统设计方法的有效性,具有工程应用价值。

Aiming at the problems of weight and power fluctuation of unmanned aerial vehicle (UAV) power supply system, the three-port topology is firstly proposed in UAV power supply system, which can simplify the circuit and reduce the weight of UAV. Secondly, the working modes and control strategies of the three-port power supply system composed of solar cell array and energy storage battery are analyzed, the regulation of solar cell array and the charge and discharge control of energy storage battery pack are realized, and the bus voltage of aircraft is kept stable by using power branch multiplexing and different control strategies. Then, aiming at the problem of pulse load of UAV, the design method of power fluctuation suppression is proposed, and the purpose of power fluctuation suppression is realized by calculating the gain of power fluctuation suppression controller and energy storage capacitance. The simulation results show the effectiveness of the design method of pulse load power supply system of UAV in long pulse width mode, which have engineering application value.

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