Power consumption control apparatus and power consumption control method

Patent metadata

Field	Value
Publication number	US-9711989-B2
Application number	US-201213711326-A
Country	US
Kind code	B2
Filing date	Dec 11, 2012
Priority date	Dec 12, 2011
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A power consumption control apparatus and method, the power consumption control method including calculating a charging cost, which represents a cost of power in a case of charging power, and a discharging cost, which represents a cost of power in a case of discharging power, of a power storage unit where the charging and discharging of power is performed, comparing the charging cost with the discharging cost of the power storage unit, controlling a power conversion unit to perform a discharging mode of performing one of the discharging of power and a reselling of power if the discharging cost is lower than the charging cost, and controlling the power conversion unit to perform a charging mode of charging the power storage unit with at least one of a new renewable power and a grid power if the charging cost is equal to or lower than the discharging cost.

First claim

What is claimed is:

1. A power consumption control method, comprising:
calculating a target amount of selling power;
calculating a charging cost representing a cost of power when charging power, and a discharging cost representing a cost of power when discharging power, of a power storage unit where the charging and discharging of power is performed;
comparing the calculated charging cost with the calculated discharging cost of the power storage unit;
controlling a power conversion unit to perform a discharging mode that performs one of the discharging of power and a reselling of power when the calculated discharging cost is lower than the calculated charging cost; and
controlling the power conversion unit to perform a charging mode of charging the power storage unit with at least one of a new renewable power and a grid power when the calculated charging cost is equal to or lower than the calculated discharging cost,
wherein the charging cost refers to the cost of power when charging the power storage unit,
wherein the discharging cost includes the cost of power when discharging the power and a price of power resold,
wherein the target amount of selling power is expressed in a following mathematical formula:
Pw t (SOC t −|ePV t −e Load t |)×margin

wherein the SOC t refers to a state of charge of a battery, the ePV t refers to an expected amount of power generation per unit time, eLoad t refers to an expected amount of power consumption required at a load per unit time, and the margin refers to a value equal to or smaller than 1 and is configured to put a margin at the target amount of selling power by having the calculated target amount of selling power be lower than a possible amount of selling power.

2. The power consumption control method of claim 1 , wherein the reselling of power is performed when the price of the power resold is not as much as the target amount of selling power.

3. The power consumption control method of claim 1 , further comprising calculating a target amount of charging power,
wherein the power storage unit is determined to need charging when the target amount of charging power is larger than 0.

4. The power consumption control method of claim 3 ,
wherein the target amount of charging power is expressed in a following mathematical formula:
Charge t =( e Load t −ePV t )×α, e Load t >ePV t

wherein the α refers to a coefficient in consideration of the loss in charging, and the mathematical formula applies when the expected amount of power consumption per unit time is larger than the expected amount of power generation per unit time.

5. The power consumption control method of claim 3 , further comprising:
calculating an expected amount of power generation of a new renewable energy source per unit time,
wherein the power storage unit is charged with the new renewable power and the grid power when the target amount of charging power is larger than 0 and larger than the expected amount of power generation.

6. The power consumption control method of claim 5 , wherein the power storage unit is charged with the new renewable power when the target amount of charging power is larger than 0, and at the same time, is equal to or smaller than the expected amount of power generation.

7. A power consumption control method comprising:
calculating a target amount of selling power;
calculating a charging cost representing a cost of power when charging power, and a discharging cost representing a cost of power when discharging power of a power storage unit where the charging of power and the discharging of power is performed;
comparing the calculated charging cost with the calculated discharging cost of the power storage unit;
controlling a power conversion unit to perform a discharging mode when the calculated discharging cost is lower than the calculated charging cost; and
controlling the power conversion unit to perform a charging mode when the calculated charging cost is equal to or lower than the calculated discharging cost,
wherein the charging cost refers to the cost of power required for charging the power storage unit, and
wherein the discharging cost includes the cost of power discharged and the price of power resold,
wherein the target amount of selling power is expressed in a following mathematical formula:
Pw t (SOC t −|ePV t −e Load t |)×margin, and

wherein the SOC t refers to a state of charge of a battery, the ePV t refers to an expected amount of power generation per unit time, the eLoad t refers to an expected amount of power consumption required at a load per unit time, and a margin refers to a value equal to or smaller than 1 and is configured to put a margin at the target amount of selling power by having the calculated target amount of selling power be lower than a possible amount of selling power.

8. The power consumption control method of claim 7 , wherein the power conversion unit is controlled to perform the discharging mode, in which one of the discharging of power or a reselling of power is performed, when the discharging cost is lower than the charging cost, and
the power conversion unit is controlled to perform the charging mode, in which the power storage unit is charged with at least one of a new renewable power and a grid power, when the charging cost is equal to or lower than the discharging cost.

9. A power consumption control apparatus, comprising:
a power storage unit at which a charging of power and a discharging of power are performed;
a power conversion unit configured to perform the charging of power and the discharging of power of the power storage unit; and
a control unit configured to calculate a target amount of selling power, calculate a target amount of selling power and a target amount of charging power, calculate a charging cost of power when charging power and a discharging cost of power when discharging power of the power storage unit, compare the calculated discharging cost with the calculated charging cost of the power storage unit, control the power conversion unit to perform a discharging mode of performing one of the discharging of power and a reselling of power when the discharging cost is lower than the charging cost, and control the power conversion unit to perform a charging mode to charge the power storage unit with at least one of a new renewable power and a grid power when the charging cost is equal to or lower than the discharging cost, thereby reducing a cost of power of the power consumption control apparatus,
wherein the charging cost refers to a cost of power required for charging the power storage unit, and
wherein the discharging cost includes a cost of power discharged and the price of power resold,
wherein the target amount of selling power is expressed in a following mathematical formula:
Pw t (SOC t −|ePV t −e Load t |)×margin, and

wherein the SOC t refers to a state of charge of a battery, the ePV t refers to an expected amount of power generation per unit time, the eLoad t refers to an expected amount of power consumption required at a load per unit time, and the margin refers to a value equal to or smaller than 1 and is configured to put a margin at the target amount of selling power by having the calculated target amount of selling power be lower than a possible amount of selling power.

10. The power consumption control apparatus of claim 9 , wherein the control unit comprises:
a communication unit configured to provide and collect information in communication with at least one of the power conversion unit, the power storage unit, a load, a new renewable energy source configured to generate the new renewable power, and a power uti

Assignees

• Samsung Electronics Co Ltd

Inventors

• Shin Jong Hyun
• Park Young Jin
• Seo Sung Mok

Classifications

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