METHOD TO CONTROL STATIC STABILISED SOURCES OF AC VOLTAGE OPERATING IN PARALLEL FOR COMMON LOAD IN CASE OF ITS ASYMMETRY

摘要

FIELD: electricity. ^ SUBSTANCE: in a control method instantaneous voltage values on a common load and output currents of sources are converted from a three-phase abc - system of coordinates into a double-phase dq-system of coordinates, control signals are generated to stabilise parameters of voltage of direct sequence on the common load and to distribute load current of direct sequence between sources. Control signals are converted from the double-phase dq - system of coordinates into the three-phase abc - system of coordinates, zero sequences of source currents are defined. For each source difference signals of zero sequence currents of only two sources are generated, a final number of harmonic components is extracted from them with a higher amplification ratio, modulating signals are generated in accordance with the invention formula. ^ EFFECT: higher evenness of load current distribution between parallel operating sources due to even distribution of zero sequence current of a load between sources under an asymmetrical load.