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US 10,108,165 B2Granted
Protective functions for parallel generators
AssigneeKohler Co.
InventorsIsaac S. Frampton, Douglas W. Dorn
Life of this patent
Estimating the term…
Abstract
A generator system may include two or more generators electrically connected through a generator bus. A controller receives operation data from a first generator. The operation data may describe a power flow from a second generator to the first generator. From the operation data, either a loss of speed control or a loss of voltage control may be identified at the second generator. The controller may generate a command for the second generator based on the loss of speed control or the loss of voltage control.
Claims16
An apparatus comprising:
- a memory configured to store expected operating parameters for a system of generators including a first generator and a second generator, wherein the expected operating parameters include a threshold for reverse power and a threshold for output voltage;
- and
- a processor configured to receive operation data for the first generator and the second generator, wherein the operation data include reverse power levels and an output voltage level, wherein the processor is configured to determine deviations between a reverse power level for the first generator and the threshold for reverse power and between an output voltage and the threshold for output voltage, wherein the processor is configured to generate a disconnection command for the second generator when the deviation for the reverse power level for the first generator exceeds an allowable range.
A system comprising:
- a first generator coupled to a generator bus;
- a second generator coupled to the generator bus;
- and
- a controller configured to identify a power flow from the first generator to the second generator through the generator bus and determine a loss of generator control based on operation data for the first generator or the second generator,
- wherein the controller disconnects the second generator based on a loss of speed control or a loss of voltage control, wherein the power flow includes reactive power when the loss of generator control is a loss of excitation control and the power flow includes real power when the loss of generator control is a loss of speed control.
2 more elements
A method comprising:
- storing, at a memory, expected operating parameters for a system of generators including a first generator and a second generator,
- wherein the expected operating parameters include a threshold for reverse power and a threshold for output voltage;
- receiving, at a processor, operation data for the first generator and the second generator, wherein the operation data include reverse power levels and an output voltage level,
- determining, by the processor, deviations between a reverse power level for the first generator and the threshold for reverse power;
- determining, by the processor, deviations between an output voltage and the threshold for output voltage;
- and
- initiating, in a normal mode, a disconnection command for the second generator is initiated when the deviation for the reverse power level for the first generator exceeds an allowable range, and wherein, in the normal mode, no disconnection command is initiated.
4 more elements
Dependencies are inferred from the claim text.