Voltage conversion unit, inverter, and photovoltaic power generation system
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorZhengang Song
Life of this patent
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Abstract
A voltage converter includes a transformer, a primary-side circuit, and a secondary-side circuit. The primary-side circuit includes a switching transistor. The secondary-side circuit includes a first circuit loop and a second circuit loop. The first circuit loop includes a secondary-side winding of the transformer, a first switch unit, and a first energy storage unit. The second circuit loop includes a secondary-side winding of the transformer, the first energy storage unit, a second switch unit, and a second energy storage unit. When the switching transistor is turned on, the first switch unit is turned on and the second switch unit is not turned on; and when the switching transistor is turned off, the second switch unit is turned on and the first switch unit is not turned on.
Claims20
A repair apparatus comprising:
- a transformer comprising a secondary-side winding;
- a primary-side circuit comprising a switching transistor;
- and
- a secondary-side circuit comprising:
- a first circuit loop comprising:
- the secondary-side winding;
- a first switch;
- and
- a first energy storage device;
- and
- a second circuit loop comprising:
- the secondary-side winding;
- the first energy storage device;
- a second switch;
- and
- a second energy storage device comprising:
- a first positive electrode configured to connect to a negative photovoltaic electrode of a photovoltaic module in a photovoltaic power generation system;
- and
- a first negative electrode configured to connect to a ground,
- wherein when the switching transistor is turned on, the first switch is configured to turn on and the second switch is configured to not turn on, and
- wherein when the switching transistor is turned off, the second switch is configured to turn on and the first switch is configured to not turn on.
A voltage converter comprising:
- a transformer comprising a secondary-side winding;
- a primary-side circuit comprising a switching transistor;
- and
- a secondary-side circuit comprising:
- a first circuit loop comprising:
- the secondary-side winding;
- a first switch;
- and
- a first energy storage device;
- a second circuit loop comprising:
- the secondary-side winding;
- the first energy storage device;
- a second switch;
- and
- a second energy storage device comprising a first port and a second port;
- a first output port connected to the first port;
- and
- a second output port connected to the second port,
- wherein when the switching transistor is turned on, the first switch is configured to turn on and the second switch is configured to not turn on, and
- wherein when the switching transistor is turned off, the second switch is configured to turn on and the first switch is configured to not turn on.
An inverter, comprising:
- an inverter circuit;
- and
- a voltage converter comprising:
- a transformer comprising a secondary-side winding;
- a primary-side circuit comprising a switching transistor;
- and
- a secondary-side circuit comprising:
- a first circuit loop comprising:
- the secondary-side winding;
- a first switch;
- and
- a first energy storage device;
- a second circuit loop comprising:
- the secondary-side winding;
- the first energy storage device;
- a second switch;
- and
- a second energy storage device comprising a first port and a second port;
- a first output port connected to the first port;
- and
- a second output port connected to the second port,
- wherein when the switching transistor is turned on, the first switch is configured to turn on and the second switch is configured to not turn on, and
- wherein when the switching transistor is turned off, the second switch is configured to turn on and the first switch is configured to not turn on.
Dependencies are inferred from the claim text.