Life degradation mitigation for transient response energy storage
First Claim
1. A variable speed genset system, comprising:
- a primary power source;
a common bus having a DC bus voltage;
an electric machine mechanically coupled to the primary power source, the electric machine electrically coupled to a load through the common bus;
an energy storage device;
a boost converter in electrical communication with each of the common bus and the energy storage device, the boost converter configured to boost a DC voltage supplied by the energy storage device into a DC voltage which approximates the DC bus voltage of the common bus; and
a controller in operable communication with the primary power source, the energy storage device, and the common bus, the controller configured to;
determine a State of Health (SOH) for the energy storage device;
selectively engage the energy storage device to provide a first power amount to the common bus; and
selectively change an operating speed of the primary power source from a first speed to a second speed to provide a second power amount to the common bus, the second speed based on the SOH, a temperature of the energy storage device, and a load power demand, wherein a combination of the first power amount and the second power amount substantially meets the load power demand.
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Accused Products
Abstract
A variable speed genset system is provided that may include a primary power source, an electric machine, an energy storage device, a boost converter, and a controller. The electric machine may be coupled to the primary power source and electrically coupled to a load through a common bus. The boost converter may be in electrical communication with the common bus and the energy storage device. The controller may determine a State of Health (SOH) for the energy storage device, selectively engage the energy storage device to provide a first power amount to the common bus, and selectively change the operating speed of the primary power source to provide a second power amount to the common bus, the speed based on the SOH, a temperature of the energy storage device, and the load demand. The combination of the first and second power amounts substantially meet a load power demand.
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Citations
20 Claims
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1. A variable speed genset system, comprising:
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a primary power source; a common bus having a DC bus voltage; an electric machine mechanically coupled to the primary power source, the electric machine electrically coupled to a load through the common bus; an energy storage device; a boost converter in electrical communication with each of the common bus and the energy storage device, the boost converter configured to boost a DC voltage supplied by the energy storage device into a DC voltage which approximates the DC bus voltage of the common bus; and a controller in operable communication with the primary power source, the energy storage device, and the common bus, the controller configured to; determine a State of Health (SOH) for the energy storage device; selectively engage the energy storage device to provide a first power amount to the common bus; and selectively change an operating speed of the primary power source from a first speed to a second speed to provide a second power amount to the common bus, the second speed based on the SOH, a temperature of the energy storage device, and a load power demand, wherein a combination of the first power amount and the second power amount substantially meets the load power demand. - View Dependent Claims (2, 3, 4, 5)
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6. A method for optimizing an operating speed of a variable speed genset system, the method comprising:
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determining a State of Health (SOH) and a temperature for an energy storage device; selectively engaging the energy storage device to provide a first power amount to a common bus of the variable speed genset system; and selectively changing, by a controller, the operating speed of a primary power source of the variable speed genset system from a first speed to a second speed to provide a second power amount to the common bus, wherein the second speed is based on the SOH, the temperature of the energy storage device, and a load power demand, and wherein a combination of the first power amount and the second power amount substantially meets the load power demand. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A transient assist system for a variable speed genset system having a primary power source, a variable speed generator, and a common bus, the transient assist system comprising:
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an energy storage device; a boost converter in electrical communication with each of the common bus and the energy storage device, the boost converter configured to boost a DC voltage supplied by the energy storage device into a DC voltage which approximates the DC bus voltage of the common bus; and a controller in operable communication with the primary power source, the energy storage device, and the common bus, the controller configured to; determine a State of Health (SOH) for the energy storage device; selectively engage the energy storage device to provide a first power amount to the common bus; and selectively change an operating speed of the primary power source from a first speed to a second speed to provide a second power amount to the common bus, the second speed based on the SOH, a temperature of the energy storage device, and a load power demand, wherein a combination of the first power amount and the second power amount substantially meets the load power demand. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification