Transient power characteristics of balanced three-phase variable inductance

Inductance has a particularly important role in power circuits. The authors have proposed the Variable Active-Passive Reactance (VAPAR), which can produce a virtual variable inductance. In this paper, the transient power characteristics of a balanced three-phase variable inductance are analyzed using the instantaneous active and reactive power theorem. With an ideal voltage source or an ideal current source connected to a balanced three-phase variable inductance, the transient power characteristics are analyzed theoretically, and then the results ale verified through simulations. In the other cases, it is difficult to solve for the transient power, but it is shown that the transient power characteristics can easily be estimated from the results of simulations in which an ideal voltage source or an ideal current source is connected to a balanced three-phase variable inductance. Experiments are also carried out to verify the theoretical analysis and simulations. (C) 2001 Scripta Technica, Electr Eng Jpn, 136(2): 49-57, 2001.