System and method of over-voltage protection
First Claim
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1. A method of over-voltage protection, comprising:
- connecting a first winding of a saturable reactor to a direct current (DC) source;
connecting at least one phase of an alternating current (AC) electrical system to ground through a second winding of the saturable reactor; and
controlling DC current flow from the DC source to the first winding of the saturable reactor in response to an over-voltage event, wherein energy is shunted to ground from the at least one phase of the AC electrical system through the second winding of the saturable reactor.
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Abstract
In one aspect, a method for over-voltage protection is provided. The method includes connecting a first winding of a saturable reactor to a direct current (DC) source; connecting at least one phase of an alternating current (AC) electrical system to ground through a second winding of the saturable reactor; and controlling DC current flow from the DC source to the first winding of the saturable reactor in response to an over-voltage event, wherein energy is shunted to ground from the at least one phase of the alternating current electrical system through the second winding of the saturable reactor.
6 Citations
20 Claims
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1. A method of over-voltage protection, comprising:
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connecting a first winding of a saturable reactor to a direct current (DC) source; connecting at least one phase of an alternating current (AC) electrical system to ground through a second winding of the saturable reactor; and controlling DC current flow from the DC source to the first winding of the saturable reactor in response to an over-voltage event, wherein energy is shunted to ground from the at least one phase of the AC electrical system through the second winding of the saturable reactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for over-voltage protection, said system comprising:
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a saturable reactor having at least a first winding, a core, and a second winding; a direct current (DC) source, wherein the first winding of the saturable reactor is connected to the DC source; an alternating current (AC) electrical system, wherein at least one phase of the AC electrical system is connected to ground through the second winding of the saturable reactor; and one or more control devices, wherein the one or more control devices are used to control DC current flow from the DC source to the first winding of the saturable reactor in response to an over-voltage event, causing energy to be shunted to ground from the at least one phase of the alternating current electrical system through the second winding of the saturable reactor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for over-voltage protection, said system comprising:
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a saturable reactor having at least a primary winding, a core, and a tertiary winding; a converter having a direct current (DC) link, wherein the tertiary winding of the saturable reactor is connected to the DC link of the converter; an alternating current (AC) electrical system, wherein at least one phase of the AC electrical system is connected to ground through the primary winding of the saturable reactor; and a breakover device and a switching device, wherein the breakover device triggers the switching device to cause the DC current flow from the DC link of the converter through the tertiary winding of the saturable reactor in response to an over-voltage event, wherein the DC current flow through the tertiary winding of the saturable reactor saturates a core of the saturable reactor causing energy to be shunted to ground from the at least one phase of the alternating current electrical system through the primary winding of the saturable reactor.
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Specification