Active engine cool down time delay for automatic transfer switch controllers
First Claim
Patent Images
1. A system for providing backup power to a facility, comprising:
- a generator; and
a controller configured to;
operate the generator until a condition is met;
determine a load history that occurs while operating the generator until the condition is met;
determine a cool-down time based on the load history that occurred during a moving window of time, wherein the moving window of time is defined as a fixed time period prior to when the condition is met, and wherein the cool-down time is based on an average power that occurred during the moving window of time; and
run the generator to the point when the condition is met and in an unloaded condition for the cool-down time;
wherein the load history determined includes a percentage of full load of the generator.
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Abstract
A system for providing backup power to a facility includes a generator and a controller. The controller is configured to operate the generator until a condition is met, determine a load history that occurs while operating the generator until the condition is met, determine a cool-down time based on the determined load history, and run the generator to the point when the condition is met and in an unloaded condition for the cool-down time.
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Citations
17 Claims
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1. A system for providing backup power to a facility, comprising:
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a generator; and a controller configured to; operate the generator until a condition is met; determine a load history that occurs while operating the generator until the condition is met; determine a cool-down time based on the load history that occurred during a moving window of time, wherein the moving window of time is defined as a fixed time period prior to when the condition is met, and wherein the cool-down time is based on an average power that occurred during the moving window of time; and run the generator to the point when the condition is met and in an unloaded condition for the cool-down time; wherein the load history determined includes a percentage of full load of the generator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing backup power to a facility, comprising:
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operating a generator until a primary power is restored to the facility; determining a load profile while operating the generator before the power was restored; determining a cool-down time based on the load profile that occurred during a moving window of time that is for a fixed time period prior to when the power was restored, and based on an average power that occurred during the moving window of time; determining the average power as a percentage load of the load profile by sensing an amount of load over a given time period that defines the moving window of time, and accounting for any change in load over the given time period; and running the generator to the point when the power is restored and in an unloaded condition for the cool-down time. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable medium tangibly embodying computer-executable instructions to:
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operate a generator until a condition is met; determine a percentage of full load while operating the generator until the condition is met; determine a cool-down time based on the percentage of full load during a moving window of time that is for a fixed time period prior to when the condition is met; and run the generator past the point when the condition is met and in an unloaded condition for the cool-down time; and calculate the percentage load over various time increments during the given time period, calculate the percentage load for each time increment, determine an average over the fixed time period, and determine the determined percentage as the average. - View Dependent Claims (16, 17)
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Specification