Reduction in generator-sourced fault current contribution
First Claim
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1. A system, comprising:
- a generator including field winding that is configured to generate a magnetic field in response to receiving a field excitation current and a generator terminal that is configured to generate an output voltage that is a function of the field excitation current applied to the field winding;
a generator step-up transformer coupled to the generator terminal of the generator, that is configured to adjust the output voltage generated from the generator terminal for interconnection with an electrical power distribution network, wherein the generator step-up transformer operates on a maximum tap selection;
an excitation system that is configured to supply the field excitation current to the field winding of the generator; and
an excitation system compensator that is configured to regulate the field excitation current supplied by the excitation system to the generator, wherein the regulated field excitation current effectuates a change in the output voltage at the generator terminal as a function of reactive power generated from the generator to reduce generator-sourced fault current contribution to the electrical power distribution network.
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Abstract
An approach for reduction in generator-sourced fault current contribution is disclosed. In one aspect, automatic excitation control of a generator is coordinated with a generator step-up transformer operating on maximized tap selection to reduce generator fault current contribution to an electrical power distribution network.
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Citations
20 Claims
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1. A system, comprising:
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a generator including field winding that is configured to generate a magnetic field in response to receiving a field excitation current and a generator terminal that is configured to generate an output voltage that is a function of the field excitation current applied to the field winding; a generator step-up transformer coupled to the generator terminal of the generator, that is configured to adjust the output voltage generated from the generator terminal for interconnection with an electrical power distribution network, wherein the generator step-up transformer operates on a maximum tap selection; an excitation system that is configured to supply the field excitation current to the field winding of the generator; and an excitation system compensator that is configured to regulate the field excitation current supplied by the excitation system to the generator, wherein the regulated field excitation current effectuates a change in the output voltage at the generator terminal as a function of reactive power generated from the generator to reduce generator-sourced fault current contribution to the electrical power distribution network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for reducing fault current contribution from a power plant to a point of interconnection with an electrical power distribution network, comprising:
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a generator including field winding that is configured to generate a magnetic field in response to receiving a field excitation current and a generator terminal that is configured to generate an output voltage that is a function of the field excitation current applied to the field winding; a generator step-up transformer, coupled to the generator terminal of the generator, that is configured to adjust the output voltage generated from the generator terminal for interconnection with an electrical power distribution network, wherein the generator step-up transformer operates on a maximum tap selection; an excitation system that is configured to supply the field excitation current to the field winding of the generator; and an excitation system compensator that is configured to determine a compensation voltage for use by the excitation system to regulate the supply of the field excitation current to the generator that effectuates voltage control of the generator to reduce generator-sourced fault current contribution to the electrical power distribution network during a normal operating mode of the generator before occurrence of a fault. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification