Study of three-single phase system for the avoidance of the unbalanced loads of network with small short-circuit power

This paper deals with the simulation of a power system designed to feed a single-phase load from a three-phase one without generating any unbalance. It is shown that, for simulating this system, the classical method based on a fixed topology fails due to simultaneous commutations in the resonant inverter. The authors propose, therefore, a new method which they call the pseudo-variable topology method, using the same ideal switch characteristic as the variable topology method but with a fixed topology.