Schaltung und Verfahren zum Parallelschalten von elektrischen Wechselstromversorgungssystemen.

摘要

A control circuit for controlling the operation of a parallel source electrical power system produces a pair of load current signals (ILC1, ILC2) representative of the load current delivered by corresponding phases (18, 24) of individual channels (10, 12) of the power system. At least one of the load current signals is scaled by a scaling factor (P1) to obtain a scaled load current signal (I min LC1) that is combined with the load current signal for the other channel to obtain a feedback signal. The feedback signal is used to control the output of one of the paralleled power sources such that the ratio of load currents (I1 , I2) delivered by the power sources is proportional to the scaling factor.