POWER CONVERSION CONTROL WITH ENERGY STORAGE
First Claim
1. A power generation system comprising:
- a renewable power source for producing source power;
a source side converter for converting the source power to converted DC power;
a source side controller for driving the converted DC power towards a maximum power point;
a DC link for receiving the converted DC power;
a grid side converter coupled to the DC link for converting DC link power from the DC link to AC output power for a grid;
a grid side controller for controlling the AC output power of the grid side converter to achieve grid interconnection requirements;
an electrical energy storage device;
an energy storage converter coupling the energy storage device to the DC link;
an energy storage controller for controlling the energy storage converter to achieve a desired power balance on the DC link,wherein the source and grid side controllers each operate independently when a SOC of the energy storage device is within an acceptable SOC operating range.
1 Assignment
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Accused Products
Abstract
A power generation system includes a renewable power source for producing source power; a source side converter for converting the source power to converted DC power; a source side controller for driving the converted DC power towards a maximum power point; a DC link for receiving the converted DC power; a grid side converter coupled to the DC link for converting DC link power from the DC link to AC output power for a grid; a grid side controller for controlling the AC output power of the grid side converter to achieve grid interconnection requirements; an electrical energy storage device; an energy storage converter coupling the energy storage device to the DC link; an energy storage controller for controlling the energy storage converter to achieve a desired power balance on the DC link.
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Citations
15 Claims
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1. A power generation system comprising:
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a renewable power source for producing source power; a source side converter for converting the source power to converted DC power; a source side controller for driving the converted DC power towards a maximum power point; a DC link for receiving the converted DC power; a grid side converter coupled to the DC link for converting DC link power from the DC link to AC output power for a grid; a grid side controller for controlling the AC output power of the grid side converter to achieve grid interconnection requirements; an electrical energy storage device; an energy storage converter coupling the energy storage device to the DC link; an energy storage controller for controlling the energy storage converter to achieve a desired power balance on the DC link, wherein the source and grid side controllers each operate independently when a SOC of the energy storage device is within an acceptable SOC operating range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A control system for a renewable power generation system comprising a renewable power source for producing source power, a source side converter for converting the source power to converted DC power, a DC link for receiving the converted DC power, a grid side converter coupled to the DC link for converting DC link power from the DC link to AC output power for a grid, an electrical energy storage device having a state of charge (SOC), and an energy storage converter coupling the energy storage device to the DC link, wherein the control system comprises:
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a source side controller for driving the converted DC power towards a maximum power point; a grid side controller for controlling the AC output power of the grid side converter to achieve grid interconnection requirements; an energy storage controller for controlling the energy storage converter to achieve a desired power balance on the DC link; and a state of charge (SOC) manager for receiving a SOC signal from the energy storage device and, when the SOC signal is outside an acceptable SOC operating range, providing one or more SOC adjustment signals to the grid side controller, the source side controller, or both the grid and source side controllers. - View Dependent Claims (14, 15)
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Specification