AUTONOMOUS TWO-UNIT POWER PLANT Russian patent published in 2020 - IPC H02J3/34 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to devices for transmitting electric power between networks with frequencies differing from each other, and can be used in autonomous sources of electric energy. Power plant comprises first variable-frequency EA 1, having ICE 2, synchronous generator 3, ICE shaft rotational speed controller (RSC) 4, economical rotation frequency generating unit 5, generator excitation unit 6, controlled rectifier 7, voltage stabilization unit 8, smoothing filter-accumulator 9, power sensor 10, self-contained voltage inverter 11, frequency setting device 12, transformer 13. Second EA 14 has ICE 15 with constant shaft rotation frequency, RSC 16, synchronous generator 17 with excitation unit 18, active power sensor 19 and switch 20. Power sensor 10 and active power sensor 19 have digital outputs. Besides, circuit includes synchronizer 21, first 22, second 23 and third 24 numerical comparators, which sets register 25, adder 26, load 27, second EA automatic control unit 28, first 29 and second 30 logic elements AND. EA 1 and 4 have identical rated powers P_nom1=P_nom2-P_n.

EFFECT: technical result consists in improvement of energy efficiency in wider range of load capacities.

1 cl, 2 dwg