Power conversion apparatus
First Claim
1. A power conversion apparatus comprising:
- a plurality of single-phase inverters, each single-phase inverter including switching devices, receiving DC power from a respective DC power source and producing AC power at an AC-output side, the AC-output sides of the plurality of single-phase inverters being connected in series, wherein the apparatus produces an output voltage that is a sum of respective output voltages generated by the plurality of single-phase inverters; and
a DC-DC converter, whereinfirst and second DC power sources of the DC power sources supply DC power to first and second single-phase inverters, the first and second single-phase inverters having their AC-output sides connected to each other, of the plurality of single-phase inverters,the first and second DC power sources are connected to each other via the DC-DC converter, andthe DC-DC converter supplies power from the first DC power source, having higher DC voltage than the second DC power source, to the second DC power source via the switching devices in the first and second single-phase inverters.
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Accused Products
Abstract
A power conversion apparatus includes a first single-phase inverter that uses as a DC power source a first DC voltage that is boosted from a solar light voltage by a boosting chopper circuit. The first single-phase inverter is arranged between two single-phase inverters that use second DC power sources that are supplied from the first DC power source. AC sides of the respective single-phase inverters are connected in series. A power conditioner thus configured provides an output voltage using the sum of the generated voltages of the respective single-phase inverters. Chopper circuits are connected between the first DC power source and the second DC power sources, and power is supplied to the second DC power sources from the first DC power source via switching devices in the single-phase inverters.
154 Citations
17 Claims
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1. A power conversion apparatus comprising:
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a plurality of single-phase inverters, each single-phase inverter including switching devices, receiving DC power from a respective DC power source and producing AC power at an AC-output side, the AC-output sides of the plurality of single-phase inverters being connected in series, wherein the apparatus produces an output voltage that is a sum of respective output voltages generated by the plurality of single-phase inverters; and a DC-DC converter, wherein first and second DC power sources of the DC power sources supply DC power to first and second single-phase inverters, the first and second single-phase inverters having their AC-output sides connected to each other, of the plurality of single-phase inverters, the first and second DC power sources are connected to each other via the DC-DC converter, and the DC-DC converter supplies power from the first DC power source, having higher DC voltage than the second DC power source, to the second DC power source via the switching devices in the first and second single-phase inverters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification