An investigation of damping control method of power converters to suppress resonance in DC power network

This paper describes a damping control method of power converters for suppression of the resonance in DC power networks. The resonance investigated in this paper is caused by the impedance of the DC distribution line and the DC line capacitors of the power converters. For detailed investigation, a combined system of a PWM rectifier and a PWM inverter is treated as a simplest example. To suppress the resonance, a damping control method is proposed and its implementation is discussed in detail. Then the proposed damping control method is applied to a prototype of the combined system of a PWM rectifier and an inverter. Experimental results verify the validity and practicability of the proposed damping control method.