Distributed electrical microgrid control
First Claim
1. A method comprising:
- monitoring voltage at a microgrid side of an electrical power source at which the electrical power source is connected to an electrical microgrid, the electrical power source comprising a Direct Current (DC) electrical generator and a power converter coupled to the DC electrical generator at the microgrid side of the DC electrical generator, the DC electrical generator having a variable maximum available output power;
varying power flow between the microgrid and the electrical power source by controlling the power converter to produce, in a voltage source and resistance model of the electrical power source, a constant voltage of the voltage source and a variable value of the resistance,controlling the power converter comprising controlling the value of the resistance to deliver the maximum available output power to the electrical microgrid over a range of microgrid voltages up to a first voltage VMAX1 below a maximum allowable voltage VMAX of the electrical microgrid,controlling the power converter further comprising controlling the power converter to provide power output to the electrical microgrid by varying the resistance value of the resistance according to
1 Assignment
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Accused Products
Abstract
An electrical power source includes a power converter and either an electrical generator or an electrical energy storage device. Power flow is controlled through control of the power converter based on a voltage source and resistance model of the electrical power source. A power converter for an electrical generator is controlled to synthesize a constant voltage of the voltage source and a variable value of the resistance. The resistance value is controlled to deliver a maximum available output power to the electrical microgrid over a range of microgrid voltages up to a voltage below a maximum allowable voltage of the electrical microgrid. For an electrical energy storage device, the power converter is controlled to synthesize a resistance value of the resistance that is dependent upon a phase angle between the voltage at the microgrid side of the electrical power source and current of the electrical energy storage device.
15 Citations
29 Claims
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1. A method comprising:
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monitoring voltage at a microgrid side of an electrical power source at which the electrical power source is connected to an electrical microgrid, the electrical power source comprising a Direct Current (DC) electrical generator and a power converter coupled to the DC electrical generator at the microgrid side of the DC electrical generator, the DC electrical generator having a variable maximum available output power; varying power flow between the microgrid and the electrical power source by controlling the power converter to produce, in a voltage source and resistance model of the electrical power source, a constant voltage of the voltage source and a variable value of the resistance, controlling the power converter comprising controlling the value of the resistance to deliver the maximum available output power to the electrical microgrid over a range of microgrid voltages up to a first voltage VMAX1 below a maximum allowable voltage VMAX of the electrical microgrid, controlling the power converter further comprising controlling the power converter to provide power output to the electrical microgrid by varying the resistance value of the resistance according to - View Dependent Claims (2)
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3. A method comprising:
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monitoring voltage at a microgrid side of an electrical power source at which the electrical power source is connected to an electrical microgrid, the electrical power source comprising a Direct Current (DC) electrical energy storage device and a power converter coupled to the DC electrical energy storage device at the microgrid side of the DC electrical energy storage device; controlling power flow between the microgrid and the electrical power source by controlling the power converter to produce, in a voltage source and resistance model of the electrical power source, a resistance value of the resistance that is dependent upon a phase angle between the voltage at the microgrid side of the electrical power source and current of the electrical power source, controlling the power converter comprising controlling the power converter to produce the resistance value as RSTOR; - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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monitoring voltage at a microgrid side of an electrical power source at which the electrical power source is connected to an electrical microgrid, the electrical power source comprising a Direct Current (DC) electrical energy storage device and a power converter coupled to the DC electrical energy storage device at the microgrid side of the DC electrical energy storage device; controlling power flow between the microgrid and the electrical power source by controlling the power converter to produce, in a voltage source and resistance model of the electrical power source, a resistance value of the resistance that is dependent upon a phase angle between the voltage at the microgrid side of the electrical power source and current of the electrical power source, controlling the power converter comprising controlling charging of the electrical energy storage device by controlling a voltage of the voltage source to be below a voltage of the electrical microgrid, controlling the power converter further comprising controlling the voltage of the voltage source to be below the voltage of the electrical microgrid according to - View Dependent Claims (17)
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18. A method comprising:
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monitoring voltages at a microgrid side of a plurality of electrical power sources at which the electrical power sources are connected to an electrical microgrid, each of the electrical power sources comprising a Direct Current (DC) power source device and a power converter coupled to the DC power source device at the microgrid side of the DC power source device; controlling power flow between the microgrid and each of the electrical power sources by controlling the power converters, the controlling comprising, for an electrical power source that comprises an electrical generator as the power source device, controlling the power converter of the electrical power source to maintain, in a voltage source and resistance model of the electrical power source, a constant voltage of the voltage source, the controlling comprising, for an electrical power source that comprises an electrical energy storage device as the power source device, controlling the power converter of the electrical power source to produce, in a voltage source and resistance model of the electrical power source, a resistance value of the resistance that is dependent upon a phase angle between the voltage at the microgrid side of the electrical power source and current of the electrical power source, controlling the power converter comprising controlling the power converter to produce the resistance value as RSTOR; - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification