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提出了一种提高基于阻尼补偿的直流(DC)发电机带恒功率负载(CPL)系统稳定性的方法。依据输入滤波器输出阻抗极大值最小原则对基于阻尼补偿的直流发电机带恒功率负载系统输入滤波器参数进行了最优设计,给出了设计方法和流程。运用Bode图和Nyquist曲线对基于阻尼补偿的直流发电机带恒功率负载系统进行稳定性分析,并与在输出端并联单电容的直流发电机带恒功率负载系统进行比较。对两种系统进行了仿真分析和试验验证。结果表明,基于阻尼补偿的直流发电机带恒功率负载系统较之在输出端并联单电容的直流发电机带恒功率负载系统带载能力可提高一倍以上。
A method to improve the stability of DC power system with constant power load (CPL) based on damping compensation is proposed. According to the minimum principle of maximum output impedance of input filter, the optimal input filter parameters of DC generator with constant power load based on damping compensation are given, and the design method and flow are given. The stability analysis of DC generator with constant power load system based on damping compensation is carried out by Bode diagram and Nyquist curve and compared with the DC generator with constant power load system with single capacitor in parallel. The two systems were simulated and verified. The results show that the damping capacity of DC generator with constant power load system can be doubled compared with that of DC generator with constant power load system.