TWO-UNIT AUTONOMOUS POWER PLANT Russian patent published in 2021 - IPC H02J3/34 

FIELD: electrical engineering and power engineering.

SUBSTANCE: invention relates to electrical engineering and electric power engineering for the transmission of electricity between networks, with frequencies that differ from one another. The power plant contains the first electric unit (EU) (1) with a variable frequency, which has: internal combustion engine (2), synchronous generator (3), rotation frequency controller (RFC) (4) the internal combustion engine shaft, the unit (5) for generating an economical rotation speed, the generator excitation unit (6), the controlled rectifier (7), the voltage stabilization unit (8), the smoothing filter storage (9), the power sensor (10), the autonomous voltage inverter (11), the frequency setter (12), the transformer (13). The second EU (14) has an internal combustion engine (15) with a constant shaft speed, an RFC (16), a synchronous generator (17) with an excitation unit (18), an active power sensor (19) and a switch (20). The power sensor (10) and the active power sensor (19) have digital outputs. In addition, the circuit contains a synchronizer (21), an automatic control unit (22) for the second EU, a numerical comparator (23), a logic element AND (24), specifying a register (25), a subtracter (26), a load (27), and a station power sensor (28). EU (1) and (14) have the same rated capacities P_nom1=P_nom2=P_n.

EFFECT: increase in reliability and energy efficiency while simplifying the scheme.

1 cl, 2 dwg