Power converter
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYusuke IWAMATSU, Naoaki FUJII
Life of this patent
Estimating the term…
Abstract
A first controller controls the DC-DC converter to perform a step-up operation when a voltage on the DC bus is lower than a first reference voltage and controls the DC-DC converter to suspend the step-up operation when the voltage is equal to or higher than the first reference voltage. A second controller controls the inverter to maintain the voltage on the DC bus constant when the voltage on the DC bus is lower than a second reference voltage and controls the inverter to maximize an output power of the inverter when the voltage is equal to or higher than the second reference voltage.
Claims12
A power conversion system comprising:
- a DC-DC converter that converts a DC power supplied from a solar cell into a DC power of a different voltage and outputs the DC power to a DC bus;
- an inverter that converts the DC power input from the DC bus into an AC power and outputs the AC power to a system;
- a first controller that controls the DC-DC converter to perform a step-up operation when a voltage on the DC bus is lower than a first reference voltage and controls the DC-DC converter to suspend the step-up operation when the voltage is equal to or higher than the first reference voltage;
- and
- a second controller that controls the inverter to maintain the voltage on the DC bus constant when the voltage on the DC bus is lower than a second reference voltage and controls the inverter to maximize an output power of the inverter when the voltage is equal to or higher than the second reference voltage.
A power converter comprising:
- a DC-DC converter that converts a DC power supplied from a solar cell into a DC power of a different voltage and outputs the DC power to a DC bus;
- and
- a first controller that controls the DC-DC converter to perform a step-up operation when a voltage on the DC bus is lower than a first reference voltage and controls the DC-DC converter to suspend the step-up operation when the voltage is equal to or higher than the first reference voltage,
- the power converter being connected to a further power converter including:
- an inverter that converts the DC power input from the DC bus into an AC power and outputs the AC power to a system;
- and a second controller that controls the inverter to maintain the voltage on the DC bus constant when the voltage on the DC bus is lower than a second reference voltage and controls the inverter to maximize an output power of the inverter when the voltage is equal to or higher than the second reference voltage.
A power converter connected to a further power converter including:
- a DC-DC converter that converts a DC power supplied from a solar cell into a DC power of a different voltage and outputs the DC power to a DC bus;
- and a first controller that controls the DC-DC converter to perform a step-up operation when a voltage on the DC bus is lower than a first reference voltage and controls the DC-DC converter to suspend the step-up operation when the voltage is equal to or higher than the first reference voltage,
- the power converter comprising:
- an inverter that converts the DC power input from the DC bus into an AC power and outputs the AC power to a system;
- and
- a second controller that controls the inverter to maintain the voltage on the DC bus constant when the voltage on the DC bus is lower than a second reference voltage and controls the inverter to maximize an output power of the inverter when the voltage is equal to or higher than the second reference voltage.
Dependencies are inferred from the claim text.