Patent ID: 11876379
Assignee: INNIO JENBACHER GMBH & CO OG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC H  F | IPC F  H

Claim 17:
18. A system, comprising:
an internal combustion engine;
a generator configured to be driven by the internal combustion engine at a generator rotary speed corresponding to a generator frequency; and
a controller configured to:
control the internal combustion engine to adjust the generator frequency in a tolerance range, wherein a grid frequency of a power supply grid is within the tolerance range;
determine a phase angle difference (Δφ) between a current and/or a voltage generated by the generator and a grid current and/or a grid voltage of the power supply grid to obtain a detected phase angle difference (Δφ);
synchronize the voltage and/or the current with the grid voltage and/or the grid current based on the detected phase angle difference (Δφ) by control of at least one temporary change in one or more parameters to reduce the phase angle difference (Δφ), and the at least one temporary change in the one or more parameters comprises at least one temporary change in an ignition timing (ttemp) relative to a predetermined nominal ignition timing (tnom) of at least one cylinder unit of the internal combustion engine wherein the controller is configured to synchronize by repeatedly switching from the predetermined nominal ignition timing (tnom) to the ignition timing (ttemp) and vice-versa a plurality of times until the phase angle difference (Δφ) is reduced to meet a phase angle tolerance range, wherein the plurality of times of the switching comprises at least five times, wherein the switching holds the ignition timing (ttemp) for less than 0.2 seconds for each of the plurality of times; and
electrically connect the generator to the power supply grid.