Power converter and fuel cell system including the same
First Claim
1. A power converter configured to convert DC power generated by a power generator into AC power, the power converter comprising:
- a boost converter circuit configured to boost an output voltage of the power generator;
an inverter circuit configured to convert an output voltage of the boost converter circuit into AC power and to interconnect the AC power with a power system;
a buck converter circuit configured to perform power conversion of output power of the boost converter circuit and to supply resultant power to an internal load; and
a controller, whereinthe controller is configured to;
control the output voltage of the boost converter circuit to be higher than or equal to a first voltage value which is greater than the maximum value of AC voltage of the power system, in a case of interconnecting output power of the power generator with the power system via the boost converter circuit and the inverter circuit; and
control the output voltage of the boost converter circuit to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system, in a case of supplying output power of the power generator to the internal load via the boost converter circuit and the buck converter circuit.
1 Assignment
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Accused Products
Abstract
A power converter of the present invention is configured to convert DC power generated by a power generator (1) into AC power. The power converter includes: a boost converter circuit (3) configured to boost an output voltage of the power generator (1); an inverter circuit (5) configured to convert an output voltage of the boost converter circuit (3) into AC power and to interconnect the AC power with a power system (2); a buck converter circuit (8) configured to perform power conversion of output power of the boost converter circuit (3) and to supply resultant power to an internal load (60); and a controller (9). The controller (9) is configured to control the output voltage of the boost converter circuit (3) to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system (2), in a case of supplying output power of the power generator (1) to the internal load (60) via the boost converter circuit (3) and the buck converter circuit (8).
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Citations
7 Claims
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1. A power converter configured to convert DC power generated by a power generator into AC power, the power converter comprising:
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a boost converter circuit configured to boost an output voltage of the power generator; an inverter circuit configured to convert an output voltage of the boost converter circuit into AC power and to interconnect the AC power with a power system; a buck converter circuit configured to perform power conversion of output power of the boost converter circuit and to supply resultant power to an internal load; and a controller, wherein the controller is configured to; control the output voltage of the boost converter circuit to be higher than or equal to a first voltage value which is greater than the maximum value of AC voltage of the power system, in a case of interconnecting output power of the power generator with the power system via the boost converter circuit and the inverter circuit; and control the output voltage of the boost converter circuit to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system, in a case of supplying output power of the power generator to the internal load via the boost converter circuit and the buck converter circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for operating a power converter configured to convert DC power generated by a power generator into AC power,
the power converter including: -
a boost converter circuit configured to boost an output voltage of the power generator; an inverter circuit configured to convert an output voltage of the boost converter circuit into AC power and to interconnect the AC power with a power system; and a buck converter circuit configured to perform power conversion of output power of the boost converter circuit and to supply resultant power to an internal load, the method comprising; controlling the output voltage of the boost converter circuit to be higher than or equal to a first voltage value which is greater than the maximum value of AC voltage of the power system, in a case of interconnecting output power of the power generator with the power system via the boost converter circuit and the inverter circuit; and controlling the output voltage of the boost converter circuit to be lower than or equal to a second voltage value which is less than the maximum value of AC voltage of the power system, in a case of supplying output power of the power generator to the internal load via the boost converter circuit and the buck converter circuit.
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Specification