Electric power control device
AssigneeMiyawaki Kobo Co., Ltd.
InventorsKesatoshi TAKEUCHI, Takahiro MIBU, Hideaki TAKAYANAGI
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Abstract
The electric power control device includes N pieces of DC/DC converters provided corresponding to N pieces of power sources, a DC wiring connected in common to output terminals of the N pieces of DC/DC converters, a load connection unit connected to the DC wiring, and a power control unit connected to the N pieces of DC/DC converters. The power control unit sets an output voltage set value of at least one of the N pieces of DC/DC converters to a value different from output voltage set values of the other DC/DC converters, thereby supplying output power of one or more of the DC/DC converters to the power load unit with priority in decreasing order of the output voltage set values.
Claims8
An electric power control device for controlling supply of power from N pieces of power sources to a power load unit, the N being an integer equal to or greater than 2, The electric power control device comprising:
- N pieces of DC/DC converters provided corresponding to the N pieces of power sources, the DC/DC converters being configured to convert voltage levels of DC power derived from corresponding power sources;
- a DC wiring connected in common to output terminals of the N pieces of DC/DC converters;
- a load connection unit connected to the DC wiring, the load connection unit being configured to be connected to the power load unit;
- a power control unit connected to the N pieces of DC/DC converters;
- at least one of
- an energy storage unit configured to perform storage processing for storing power supplied through the DC wiring as storage energy, and power discharge processing for supplying power to the DC wiring by using the storage energy, and
- an external power line connection unit configured to perform power reception processing for receiving power from an external power line and supplying the power to the DC wiring, and power transmission processing for transmitting power supplied through the DC wiring to the external power line;
- and
- a voltage sensor configured to measure a voltage of the DC wiring,
- wherein the power control unit sets an output voltage set value of at least one of the N pieces of DC/DC converters to a value different from output voltage set values of the other DC/DC converters, thereby supplying the output power of one or more of the DC/DC converters to the power load unit with priority in decreasing order of the output voltage set values, and
- wherein when the voltage of the DC wiring measured by the voltage sensor is equal to or higher than a first threshold which is set lower than any of the N pieces of the output voltage set values for the N pieces of DC/DC converters, the power control unit determines that power consumption by the power load unit is less than a total value of output power of the N pieces of DC/DC converters, and allows consumption of surplus power corresponding to a difference between the power consumption and the total value of the output power by at least one of the storage processing of the energy storage unit and the power transmission processing of the external power line connection unit.
(canceled)
An electric power control device for controlling supply of power from N pieces of power sources to a power load unit, the N being an integer equal to or greater than 2, The electric power control device comprising:
- N pieces of DC/DC converters provided corresponding to the N pieces of power sources, the DC/DC converters configured to convert voltage levels of DC power derived from corresponding power sources;
- a DC wiring connected in common to output terminals of the N pieces of DC/DC converters;
- a load connection unit connected to the DC wiring, the load connection unit being configured to be connected to the power load unit;
- a power control unit connected to the N pieces of DC/DC converters;
- a voltage sensor configured to measure a voltage of the DC wiring;
- and
- at least one of an energy storage unit and an external power line connection unit, the energy storage unit being configured to perform storage processing for storing power supplied through the DC wiring as storage energy, and power discharge processing for supplying power to the DC wiring by using the storage energy, the external power line connection unit being configured to perform power reception processing for receiving power from an external power line and supplying the power to the DC wiring, and power transmission processing for transmitting power supplied through the DC wiring to the external power line,
- wherein the power control unit is capable of individually setting output voltage set values of the N pieces of DC/DC converters, and
- when the voltage of the DC wiring measured by the voltage sensor is equal to or higher than a first threshold which is set lower than any of the N pieces of the output voltage set values for the N pieces of DC/DC converters, the power control unit determines that power consumption by the power load unit is less than a total value of output power of the N pieces of DC/DC converters, and allows consumption of surplus power corresponding to a difference between the power consumption and the total value of the output power, by at least one of the storage processing of the energy storage unit and the power transmission processing of the external power line connection unit.
Dependencies are inferred from the claim text.