Transient performance of power circuit including virtual inductance realized by fully digital controlled variable active-passive reactance (VAPAR)

An inductance affects the response of power circuits. The authors have already proposed a variable active-passive reactance (VAPAR) which can be virtual inductance in power circuits. The previously proposed VAPAR can not generate both positive and negative inductance with the same controller´s parameters. In order to overcome this inconvenience, in this paper, a new control method is proposed using a flux controller. The effectiveness of the proposed method is verified through simulations and experiments. On the other hand, a negative inductance, which is one of the notable features of the VAPAR, is not stable alone. The characteristics of a negative inductance have been discussed in an RL circuit in the previous studies. In this paper, power circuits including a negative inductance and capacitance is analyzed from the view point of the stability