INDEPENDENT ELECTRIC SUPPLY SYSTEM Russian patent published in 2019 - IPC H02J3/02 H02P9/02 

FIELD: electrical equipment.

SUBSTANCE: invention relates to the electrical equipment. Expansion of the system functional capabilities due to possibility of the unstable frequency alternating voltage loads supplying, but of stable amplitude and adjustable actuating electric drive with regenerative braking, as well as due to possibility of the stable frequency alternating voltage phase-by-phase balancing stabilization, which is provided due to fact that into the autonomous power supply system, in three-phase electric machine each main channel containing the alternating voltage with unstable parameters starter generator, diode-bridge rectifier, two-capacitor filter rack, power factor corrector consisting of the first inductive-capacitance filter and three bidirectional electronic switches, the first pulse modulator with three valve-switching racks, the filter capacitor, transformer with the first and the second windings, four groups of distribution buses for connection: the first one of the starter-generator and the alternating voltage with unstable parameters loads, second one of the alternating voltage with stable parameters loads, the third and the fourth ones of the power supply and load sources, as well as the parallel main channels similar low and high constant voltage buses supply, and also control unit with feedback circuits and with the pulse-modulator terminals first group, first, the second pulse modulator, the transformer reactor with windings, filter capacitors, reversible rectifier-inverter converter, step-up pulse converter, ballast throttles, controlled rectifier bridge rectifier, fifth group of distribution buses for the alternating voltage loads with unstable frequency connection, but with stable amplitude, the second inductive-capacitive filter and the three-phase cycle-converter, consisting of bidirectional controlled valves are introduced, the transformer is equipped with the third winding, as well as three phase windings, and the control unit is equipped with the second group of pulse-modulator terminals and a group of relay-signal terminals, secondly, into each of the modulators a buffer capacitor is introduced, and thirdly, the pulse converter is made of diode-switch rack, the controlled valve and the throttle-and-capacitor rack, and the control unit is equipped with additional leads; fourth, the modulators are equipped with damper-snubber chains, consisting of the snubber capacitors damping throttles and two-diode racks and, fifth, it includes external terminals for the controlled actuating electric drive connection and three controlled contactors three-phase groups, and control unit is equipped with command leads, and sixthly, into each modulator the balancing voltage divider is introduced, consisting of surge reactor and two diode-switch racks, and control unit is equipped with auxiliary pulse-modulator outputs.

EFFECT: expansion of the system functional capabilities due to the possibility of the unstable frequency alternating voltage loads supplying.

6 cl, 1 dwg