电流变化率控制法在电力传动系统中的研究

Research on the Current Rate of Change Control Method for Electric Driving System

闭环电力传动系统是多电飞机的一种典型恒功率负载,表现动态的负阻抗特性,可能会引起谐振,对航空电网的电能质量和稳定性有很严重危害。在此提出了一种新型的控制方法,即电流变化率控制法,通过控制电流的变化率调节恒功率负载的等效动态电阻值,使其满足稳定性条件,保障电网的稳定性,并且将扰动出现时,由负阻抗特性引起的电网电压和电流的瞬态冲击与振荡控制在合理的范围内,改善电网的动态响应特性。与其他解决方法相比,电流变化率控制法可以保障电网稳定性,有效减小电压和电流的谐振幅值。通过电力传动系统的仿真和实验验证电流变化率控制法可以保障电网稳定性,并有效改善动态响应性能。

Closed loop power driving system is a typical kind of constant power load of multi electric aircraft, and performs negative impedance characteristics, which may cause the resonance of the power quality and stability of the aviation power grid.A new control method, current rate of change control method is proposed,which can satisfy the stability condition, ensure the stability of the power network, and improve the dynamic response of the power network. Compared with other methods, the current rate control method can guarantee the stability of the power network, effec- tively reduce the harmonic amplitude of the voltage and current.Through simulation and experimental verification of power transmission system, the current rate of change control method can guarantee the stability of the network, and improve the dynamic response performance.