长脉宽模式下雷达供电系统功率波动机理研究

长脉宽工作模式引起的雷达系统功率大范围波动对供电系统稳定性造成影响。首先建立阵面发射单元的数学模型,根据脉冲负载的平均功率供电模式特点,提出了电流裕度的概念。采用状态空间分段方法,分析了供电系统的电压和电流变化规律,推导出长脉宽工作模式下系统功率波动函数及其简化形式。然后,提出峰峰值与平均功率比PAPR(peak-peak to average power ratio),用以定量分析功率波动程度,根据该指标,分析了影响系统功率波动的影响因素,得到了功率波动与影响因素之间的关系。最后通过实例分析,验证了所提出的结论,为长脉宽工作模式下雷达电源系统设计奠定了理论基础,具有良好的工程应用价值。

Study on Power Fluctuation Mechanism of Radar Power System in Long Pulse Width Mode

The stability of a power system is affected by the great fluctuation of the radar power system caused by the long pulse width operation mode. First, the mathematical model of an array transmitting unit is built, and the concept of current margin is put forward according to the characteristics of average power supply mode of pulse load. The variation rules for the voltage and current of the power system are analyzed using the state space segmentation method, and the system power fluctuation function and its simplified form are deduced in the long pulse width operation mode. Second, the concept of peak-peak to average power ratio (PAPR) is proposed to quantitatively analyze the degree of power fluc-tuation, according to which the influencing factors of system power fluctuation are analyzed, thereby obtaining the relationship between power fluctuation and the corresponding influencing factors. Finally, the proposed conclusions are verified by the analysis of an example, which lays a theoretical foundation for the radar power system design in long pulse width operation mode and has satisfying engineering application value.