Power supply device and method of controlling power supply
First Claim
1. A power supply device, comprising:
- a converter configured to convert a first AC power input from an external power system to a first DC power;
a storage device configured to be charged with the first DC power from the converter;
an inverter configured to convert a second DC power from the storage device to a second AC power, wherein the second AC power is in phase with the first AC power;
an output AC power generating unit configured to generate an output AC power based on the first AC power and the second AC power that is in phase with the first AC power; and
a controller configured to;
obtain external power information which indicates a relationship between a power supply and a power demand in the external power system through a network, wherein the relationship corresponds to a ratio of the power demand to the power supply;
output a control signal to control the output AC power generating unit based on the obtained external power information;
control the output AC power generating unit such that the first AC power accounts for all of the output AC power based on the ratio that is less than or equal to a first threshold value; and
control the output AC power generating unit such that the first AC power and the second AC power are added to obtain the output AC power based on the ratio that is greater than the first threshold value and less than a second threshold value.
1 Assignment
0 Petitions
Accused Products
Abstract
A converter which converts first AC power input from an external power system to DC power, a storage device charged with the DC power from the converter, an inverter which converts DC power from the storage device to second AC power, an output AC power generating unit to which the first AC power and the second AC power are input, the unit which generates output AC power, and a controller which obtains external power information indicating a relationship between a power supply and a power demand in the external power system through a network and outputs a control signal to control the output AC power generating unit according to the external power information are provided. The controller controls the output AC power generating unit according to a state of a margin of the power supply.
13 Citations
10 Claims
-
1. A power supply device, comprising:
-
a converter configured to convert a first AC power input from an external power system to a first DC power; a storage device configured to be charged with the first DC power from the converter; an inverter configured to convert a second DC power from the storage device to a second AC power, wherein the second AC power is in phase with the first AC power; an output AC power generating unit configured to generate an output AC power based on the first AC power and the second AC power that is in phase with the first AC power; and a controller configured to; obtain external power information which indicates a relationship between a power supply and a power demand in the external power system through a network, wherein the relationship corresponds to a ratio of the power demand to the power supply; output a control signal to control the output AC power generating unit based on the obtained external power information; control the output AC power generating unit such that the first AC power accounts for all of the output AC power based on the ratio that is less than or equal to a first threshold value; and control the output AC power generating unit such that the first AC power and the second AC power are added to obtain the output AC power based on the ratio that is greater than the first threshold value and less than a second threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of controlling a power supply, comprising:
-
converting a first AC power input from an external power system to a first DC power by a converter; charging a storage device with the first DC power from the converter; converting a second DC power from the storage device to a second AC power by an inverter, wherein the second AC power is in phase with the first AC power; generating an output AC power by an output AC power generating unit based on the first AC power and the second AC power that is in phase with the first AC power; obtaining external power information indicating a relationship between a power supply and a power demand in the external power system through a network, wherein the relationship corresponds to a ratio of power demand to the power supply; generating, by a controller configured to receive operation power supply from the first DC power, a control signal to control the output AC power generating unit based on the obtained external power information by a controller; controlling the output AC power generating unit such that the first AC power accounts for all of the output AC power based on the ratio that is less than or equal to a first threshold value; and controlling the output AC power generating unit such that the first AC power and the second AC power are added to obtain the output AC power based on the ratio that is greater than the first threshold value and less than a second threshold value.
-
Specification