SYSTEM AND METHOD FOR POWER CONVERSION
First Claim
1. A grid-side transformerless power conversion system configured to perform power conversion between a power grid and a load, the power conversion system comprising:
- a first converter configured to convert first AC power provided from the power grid into DC power, the first converter comprising;
a first converter module; and
a second converter module coupled to the first converter module to form a nested neutral point piloted topology;
a first filter coupled between the power grid and the first converter; and
a second converter coupled to the first converter, the second converter configured to convert the DC power into second AC power and provide the second AC power to the load.
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Accused Products
Abstract
A grid-side transformerless power conversion system configured to perform power conversion between a power grid and a load, the transformerless power conversion system includes a first converter, a first filter, and a second converter. The first converter is configured to convert first AC power provided from the power grid into DC power. The first converter includes a first converter module and a second converter module coupled to the first converter module to form a nested neutral point piloted topology. The first filter is coupled between the power grid and the first converter. The second converter is coupled to the first converter. The second converter is configured to convert the DC power into second AC power and provide the second AC power to the load.
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Citations
20 Claims
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1. A grid-side transformerless power conversion system configured to perform power conversion between a power grid and a load, the power conversion system comprising:
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a first converter configured to convert first AC power provided from the power grid into DC power, the first converter comprising; a first converter module; and a second converter module coupled to the first converter module to form a nested neutral point piloted topology; a first filter coupled between the power grid and the first converter; and a second converter coupled to the first converter, the second converter configured to convert the DC power into second AC power and provide the second AC power to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A grid-side transformerless power conversion system configured to perform power conversion between a power grid and a load, the power conversion system comprising:
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a first converter configured to convert first AC power provided from the power grid into DC power, the first converter comprising; a first converter module; and a second converter module coupled to the first converter module to form a nested neutral point piloted topology; a differential-mode (DM) filter coupled between the power grid and the first converter; a second converter coupled to the first converter, the second converter configured to convert the DC power into second AC power and provide the second AC power to the load; and a common-mode (CM) filter coupled between the power grid and the first converter or coupled between the first converter and the second converter.
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18. A method for performing power conversion between a power grid and a load using a power conversion system, wherein the power conversion system comprises an AC-DC converter and a DC-AC converter, wherein the AC-DC converter comprises at least a first converter module and a second converter module coupled together to form a nested neutral point piloted topology, the method comprising:
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receiving first AC voltage filtered by a grid-side filter, wherein the first AC voltage is not processed by a grid-side transformer; converting the first AC voltage to DC voltage using the AC-DC converter; converting the DC voltage to second AC voltage using the DC-AC converter; and providing the second AC voltage to the load. - View Dependent Claims (19, 20)
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Specification