SCHALTUNGSANORDNUNG ZUM SYNCHRONISIEREN EINER EIN WECHSELSPANNUNGSSIGNAL ERZEUGENDEN ENERGIEQUELLE MIT EINEM SIGNAL AUF EINER SAMMELSCHIENE.

摘要

A plurality of static inverters are connected in parallel to a common bus. A frequency and voltage control feedback loop in each inverter encompasses the load terminals and permits the inverter to operate independently with only its output terminals common to the rest of the system. The inverter output is harmonized with the common signal on the bus by achieving orthogonality between the real and reactive output currents and the voltage and frequency, respectively, of the common signal on the bus. The orthogonality is obtained by applying appropriate voltage magnitude and phase correction signals to the internal voltage generating mechanism of each individual inverter. This permits the utilization of the inverters in parallel without the necessity of using some common reference frequency signal source and hence improves reliability of the system.