| CPC H02P 9/06 (2013.01) [H02K 19/16 (2013.01); H02K 19/38 (2013.01)] | 18 Claims |
|
1. A method for synchronizing a synchronous generator with other synchronous generators, the method comprising:
mechanically rotating the synchronous generator at a predetermined rotational speed;
receiving, by a protective relay controlling the synchronous generator, an external clock signal;
generating, by the protective relay, a target generator output representing a nominal output voltage, nominal output frequency, and nominal output phase, wherein the target generator output is independent of a voltage and frequency of a bus to be energized by the synchronous generator simultaneously with the other synchronous generators, and wherein the nominal output phase is generated based on the external clock signal;
sending a voltage command signal to an excitation control system to adjust an output voltage of the synchronous generator;
sending a speed command to a mechanical control system to change the rotational speed of the synchronous generator to adjust an output frequency and an output phase of the synchronous generator;
transmitting, by the protective relay when the output voltage, output frequency, and output phase of the synchronous generator are matched with the nominal output voltage, nominal output frequency, and nominal output phase, a synchronized signal indicating the synchronous generator is synchronized;
estimating an amount of power demand required by the bus;
determining a number of synchronized signals corresponding to a number of additional synchronous generators required to ensure sufficient power generation to meet the estimated amount of power demand of the bus, wherein each synchronized signal indicates that a synchronous generator from which the synchronized signal is received is synchronized; and
in response to receiving the determined number of synchronized signals from at least a portion of the other synchronous generators, and having transmitted the synchronized signal, closing a breaker associated with the synchronous generator to cause the synchronous generator to energize the bus simultaneously with the other synchronous generators.
|