Distributed power system using direct current power sources
First Claim
1. A system comprising:
- a plurality of power converters, each power converter coupled to a DC power source, wherein each power converter includes;
a control loop adapted to provide a feedback signal to the power converter from a connection between the power converter and the coupled DC power source; and
a power conversion portion adapted to perform at least one of;
converting power to discharge the coupled DC power source, and converting power to charge the coupled DC power source,wherein each of the plurality of power converters is adapted for serial connection to at least one other power converter of the plurality of power converters.
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Accused Products
Abstract
A distributed power system including multiple (DC) batteries each DC battery with positive and negative poles. Multiple power converters are coupled respectively to the DC batteries. Each power converter includes a first terminal, a second terminal, a third terminal and a fourth terminal. The first terminal is adapted for coupling to the positive pole. The second terminal is adapted for coupling to the negative pole. The power converter includes: (i) a control loop adapted for setting the voltage between or current through the first and second terminals, and (ii) a power conversion portion adapted to selectively either: convert power from said first and second terminals to said third and fourth terminals to discharge the battery connected thereto, or to convert power from the third and fourth terminals to the first and second terminals to charge the battery connected thereto. Each of the power converters is adapted for serial connection to at least one other power converter by connecting respectively the third and fourth terminals, thereby forming a serial string. A power controller is adapted for coupling to the serial string. The power controller includes a control part adapted to maintain current through or voltage across the serial string at a predetermined value.
981 Citations
20 Claims
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1. A system comprising:
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a plurality of power converters, each power converter coupled to a DC power source, wherein each power converter includes; a control loop adapted to provide a feedback signal to the power converter from a connection between the power converter and the coupled DC power source; and a power conversion portion adapted to perform at least one of;
converting power to discharge the coupled DC power source, and converting power to charge the coupled DC power source,wherein each of the plurality of power converters is adapted for serial connection to at least one other power converter of the plurality of power converters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a first plurality of DC power sources; a first plurality of power converters respectively coupled to the first plurality of DC power sources, wherein each of the first plurality of power converters includes a control loop and a power conversion portion, and wherein each of the first plurality of power converters is adapted for serial connection to at least one other power converter of the first plurality of power converters, thereby forming a first serial string; a second plurality of DC power sources; and a second plurality of power converters respectively coupled to the second plurality of DC power sources, wherein each of the second plurality of power converters includes a control loop and a power conversion portion, and wherein each of the second plurality of power converters is adapted for serial connection to at least one other power converter of the second plurality of power converters, thereby forming a second serial string, wherein the first serial string and the second serial string are connectible in parallel to form parallel-connected strings. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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coupling a plurality of DC power sources respectively to a plurality of power converters, wherein each of the plurality of power converters includes; a control loop adapted to provide a feedback signal to the power converter from a connection between the power converter and the coupled DC power source; and a power conversion portion adapted to perform at least one of;
converting power to discharge the coupled DC power source, or converting power to charge the coupled DC power source;coupling the plurality of power converters together in a serial connection to form a serial string of power converters; and coupling the serial string of power converters to a power controller configured to maintain current through or voltage across the serial string of power converters at a predetermined value.
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Specification