DEVICE FOR UNINTERRUPTED POWER SUPPLY Russian patent published in 2016 - IPC H02J9/00 

FIELD: energy.

SUBSTANCE: use: in electric power engineering. Device comprises backup generator, a unit for isolation with power system, consisting of a rectifier, serially connected with charging device and storage battery, switch, series-connected with storage battery, rectifier and inverter, switches for connecting stand-alone power plant to the main alternating-current bus, means for automatic disconnection of consumers connected to the main alternating-current bus control system connected to stand-alone power plant, standby generator, switch for connection of the accumulator battery to inverter , devices of automatic backup, one of which is connected in parallel to the switch for connection of stand-alone power plant to alternating-current bus and the other-parallel to the switch for connection of reserve generator to the main alternating-current bus and thyristor switch, connected in parallel to the switch for connection with the system isolation unit, as well as a switch, mounting AC buses of reserve generator to the rectifier.

EFFECT: two-stage of reserve automatic input while maintaining the required level of charge of accumulator batteries.

1 cl, 1 dwg