METHOD TO CONTROL STATIC STABILISED SOURCES OF AC VOLTAGE OPERATING IN PARALLEL FOR COMMON LOAD IN CASE OF ITS ASYMMETRY Russian patent published in 2013 - IPC H02J3/46 

FIELD: electricity.

SUBSTANCE: in a control method, based on conversion of instantaneous values of voltage at a common load and output currents of sources from a three-phase abc-system of coordinates into a double-phase dq-system of coordinates, the first and second differential signals are generated by subtraction of accordingly d- and q-components of currents from only two sources, the first and second signals of comparison are generated for d- and q-components of a control signal, stabilising parameters of voltage of direct sequence on the common load and current-distributing loads of direct sequence between sources, in differential signals the final number of harmonic components is identified with maximum amplification ratio, generation of d- and q-components of a control signal is carried out by subtraction of the sum of identified harmonic components accordingly from the first and second differential signals from the first and second signals of comparison, amplitude and phase of modulating signals are generated by reverse conversion of d- and q-components of the control signal from a double-phase dq-system of coordinates into a three-phase abc-system of coordinates.

EFFECT: increased evenness of load current distribution between parallel operating sources due to even distribution of current of reverse sequence of a load between sources.

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