Low cost current source converters for power generation application
First Claim
1. A system, comprising:
- a first generator-side converter circuit comprising a first diode bridge and coupled in series with a second generator-side converter circuit comprising a second diode bridge,wherein the first generator-side converter circuit is coupled to a first generator of a set of generators that is coupled to a turbine and the second generator-side converter circuit is coupled to a second generator of the set of generators, the first generator and the second generator convert kinetic energy generated by the turbine to an electrical energy signal, and the first generator-side converter circuit and the second generator-side converter circuit receive the electrical energy signal and output a direct current signal based on the electrical energy signal; and
a grid-side converter circuit, coupled to outputs of the first generator-side converter circuit and the second generator-side converter circuit via a direct current link, comprising a current source inverter circuit that converts the direct current signal to a three-phase alternating current signal, wherein a direct current link voltage is varied to control the first generator-side converter circuit and the second generator-side converter circuit to facilitate an increase in power received from the set of generators.
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Accused Products
Abstract
A system comprising low cost topology for power converter systems is provided. The system takes advantage of the voltage-boost characteristic of a current source inverter (CSI) and utilizes a PWM CSI as a grid-side converter for power generation systems. Moreover, the generator-side converter employs low-cost devices, such as, but not limited to diode bridge, thyristor bridge, and/or a combination of diodes and thyristors, and accordingly simplifies generator-side converter and control. Further, the system provides a wider range of operation than traditional voltage source converter based topologies that utilize a voltage source inverter (VSI) as the grid-side convertor along with a diode rectifier as the generator-side converter.
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Citations
20 Claims
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1. A system, comprising:
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a first generator-side converter circuit comprising a first diode bridge and coupled in series with a second generator-side converter circuit comprising a second diode bridge, wherein the first generator-side converter circuit is coupled to a first generator of a set of generators that is coupled to a turbine and the second generator-side converter circuit is coupled to a second generator of the set of generators, the first generator and the second generator convert kinetic energy generated by the turbine to an electrical energy signal, and the first generator-side converter circuit and the second generator-side converter circuit receive the electrical energy signal and output a direct current signal based on the electrical energy signal; and a grid-side converter circuit, coupled to outputs of the first generator-side converter circuit and the second generator-side converter circuit via a direct current link, comprising a current source inverter circuit that converts the direct current signal to a three-phase alternating current signal, wherein a direct current link voltage is varied to control the first generator-side converter circuit and the second generator-side converter circuit to facilitate an increase in power received from the set of generators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method, comprising:
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receiving, by an interconnection circuit, an electrical signal via a set of generators coupled to a turbine that convert kinetic energy generated by the turbine to the electrical signal; converting, by the interconnection circuit, the electrical signal to a direct current signal by employing a first diode bridge circuit coupled to a first generator of the set of generators and a second diode bridge circuit coupled to a second generator of the set of generators, wherein the first diode bridge circuit and the second diode bridge circuit are coupled in series; and directing, by the interconnection circuit, the direct current signal to a current source inverter circuit via a direct current link to facilitate a conversion of the direct current signal to a three-phase alternating current signal, wherein a voltage across the direct current link is adjusted to control the first diode bridge circuit and the second diode bridge converter circuit and facilitate an increase in power received from the set of generators. - View Dependent Claims (15, 16, 17, 18)
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19. A method, comprising:
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converting, by a set of generators, kinetic energy generated by a turbine into an electrical energy signal; and providing the electrical energy signal to a current source inverter circuit via a first diode bridge circuit and a second diode bridge circuit that are coupled in series to facilitate a generation of a three-phase alternating current signal, wherein the first diode bridge circuit is coupled to a first generator of the set of generators and the second diode bridge circuit is coupled to a second generator of the set of generators and wherein the voltage across a direct current link that couples the first diode bridge circuit and the second diode bridge circuit to the current source inverter circuit is modified to control a power signal provided by the set of generators. - View Dependent Claims (20)
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Specification