Power conversion system and method
First Claim
1. A power conversion system, comprising:
- a first power conversion module coupled with a power source module via one or more first input terminals, wherein the first power conversion module is configured to convert a first input power at the one or more first input terminals to a first output power at one or more first output terminals for providing to a load module, the first power conversion module comprising a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the first load side converter;
a second power conversion module coupled with the power source module via one or more second input terminals, wherein the second power conversion module is configured to convert a second input power at the one or more second input terminals to a second output power at one or more second output terminals for providing to the load module, the second power conversion module comprising a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter; and
a controller in electrical communication with the first power conversion module and the second power conversion module, wherein the controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module, wherein the switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage at the first DC link and a second DC link voltage at the second DC link.
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Abstract
An exemplary power conversion system includes a first power conversion module, a second power conversion module, and a controller. The first power conversion module includes a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the second load side converter. The second power conversion module includes a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter. The controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module. The switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage and a second DC link voltage.
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Citations
20 Claims
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1. A power conversion system, comprising:
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a first power conversion module coupled with a power source module via one or more first input terminals, wherein the first power conversion module is configured to convert a first input power at the one or more first input terminals to a first output power at one or more first output terminals for providing to a load module, the first power conversion module comprising a first source side converter, a first load side converter, and a first DC link coupled between the first source side converter and the first load side converter; a second power conversion module coupled with the power source module via one or more second input terminals, wherein the second power conversion module is configured to convert a second input power at the one or more second input terminals to a second output power at one or more second output terminals for providing to the load module, the second power conversion module comprising a second source side converter, a second load side converter, and a second DC link coupled between the second source side converter and the second load side converter; and a controller in electrical communication with the first power conversion module and the second power conversion module, wherein the controller is configured to generate a number of switching signals according to a circuit structure of the power source module or a circuit structure of the load module, wherein the switching signals are provided to the first power conversion module and the second power conversion module to balance a first DC link voltage at the first DC link and a second DC link voltage at the second DC link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling a power conversion system, the method comprising:
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generating a number of switching signals according to a circuit structure of a power source module or a circuit structure of a load module; and providing the number of switching signals to a first power conversion module and a second power conversion module to balance a first DC link voltage at a first DC link and a second DC link voltage at a second DC link. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A wind power conversion system, comprising:
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a wind generator for providing a first input power at one or more first input terminals and a second input power at one or more second input terminals; a first power conversion module coupled with the wind generator via the one or more first input terminals, wherein the first power conversion module is configured to convert the first input power to a first output power at one or more first output terminals for providing to a power grid, the first power conversion module comprising a first rectifier, a first inverter, and a first DC link coupled between the first rectifier and the first inverter; a second power conversion module coupled with the wind generator via the one or more second input terminals, wherein the second power conversion module is configured to convert the second input power to a second output power at one or more second output terminals for providing to a load module, the second power conversion module comprising a second rectifier, a second inverter, and a second DC link coupled between the second rectifier and the second inverter; and a controller in electrical communication with the first power conversion module and the second power conversion module, wherein the controller is configured to generate a number of source side switching signals according to a winding-structure of the generator for providing to the first rectifier and the second rectifier, to reduce the voltage difference between a first DC link voltage at the first DC link and a second DC link voltage at the second DC link.
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Specification