METHOD TO CONTROL STATIC STABILISED DC VOLTAGE SOURCES OPERATING IN PARALLEL INTO COMMON LOAD Russian patent published in 2010 - IPC H02J3/46 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in organising electric power generation systems or uninterrupted power supply systems with sources connected in parallel into common load. Proposed method comprises measuring instantaneous voltages at common load and source instantaneous currents, obtained magnitudes being transformed from three-phase abc-system of coordinates into two-phase dq-system of coordinates, and generating reference voltage signals for d- and q-components of total voltage. Extra voltage signals are generated in proportion to d- and q-components of total voltage. Difference voltage signals are generating by subtracting appropriate extra voltage signals from reference voltage signals. Voltage comparison signals are generated by integrating voltage signals and voltage control signals are generated by summing voltage comparison signals with those proportional to voltage difference signals. Reference signals are generated for every source operated in parallel, proportional to appropriate voltage control signals. Extra signals are generated in proportion to d- and q-components of source current, as well as difference signals, comparison signals, signal of control over summation of comparison signals. Also generated are signals proportional to difference signals and signals proportional to d- and q-components of source current. Now modulating signals in abc-coordinate system are generated.

EFFECT: expanded performances in standard and post-fault operating conditions.

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