METHODS FOR CONTROL OF STATIC STABILISED AC VOLTAGE SOURCES WORKING IN PARALLEL FOR COMMON LOAD Russian patent published in 2012 - IPC H02M7/48 H02M7/493 

FIELD: electricity.

SUBSTANCE: according to the control method one measures output voltage and current instantaneous values per each source; the measured output voltage and current instantaneous values are converted from the abc three-phase coordinate system into the dq two-phase coordinate system rotating at constant frequency Ω; comparison signals are generated for d- and q- components which signals distribute the load current between the sources working in parallel and stabilise the voltage parameters on the common load in the established mode; the modulating voltage amplitude and phase are generated by way of reverse conversion of d- and q- components from dq two-phase coordinate system into abc three-phase coordinate system; for each source additional signals are generated proportional to the d- and q-components of the source currents; the additional signals are summarised with the corresponding d- and q-components of the comparison signals; the said reverse conversion is performed using summarised signals.

EFFECT: enhancement of dynamic characteristics of sources working in parallel through decrease of the value of variation of voltage on the common load and reduction of duration of the transitory process of establishment of the total voltage parameters during load commutation.

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