POWER MANAGEMENT SYSTEM, POWER MANAGEMENT METHOD, AND UPPER POWER MANAGEMENT APPARATUS

• US 20140244060A1
• Filed: 09/04/2012
• Published: 08/28/2014
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Joko, Shingo
• Granted Patent: US 9,819,194 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

A power management system comprises a plurality of HEMSs 40 and a CEMS 40. The CEMS 40 receives from each HEMS 10, power information including an amount of power consumed by a load connected to each HEMS 10. The CEMS 40 transmits, to each HEMS 10, reduction information including an amount of power that should be reduced in each consumer 70 in response to a power curtailment signal and the power information.

Claims

1. A power management system comprising a plurality of lower power management apparatuses each of which is provided for each of a plurality of consumers and an upper power management apparatus that manages the plurality of lower power management apparatuses, wherein

each lower power management apparatus transmits, to the upper power management apparatus, power information including an amount of power consumed by a load connected to each lower power management apparatus, and

the upper power management apparatus transmits, to each lower power management apparatus, reduction information including an amount of power that should be reduced in each consumer in response to a power curtailment signal transmitted from a power company that manages a power grid and the power information.

2. The power management system according to claim 1, wherein

each lower power management apparatus transmits, to the upper power management apparatus, the power information including an amount of power consumed for each category to which the load connected to each lower power management apparatus belongs.

3. The power management system according to claim 2, wherein

the category has a priority, and

the upper power management apparatus decides an amount of power that should be reduced in each consumer so as to preferentially reduce power consumed by a load belonging to a category having a low priority.

4. The power management system according to claim 3, wherein

each lower power management apparatus reduces power consumed by a load connected to each lower power management apparatus, in response to the reduction information received from the upper power management apparatus.

5. The power management system according to claim 4, wherein

the power curtailment signal includes an amount of power that should be reduced from an amount of power currently consumed by a load connected to the power grid.

6. The power management system according to claim 5, wherein

the upper power management apparatus decides an amount of power that should be reduced in each consumer, in accordance with a coefficient corresponding to a contract of a maximum current value available for each consumer.

7. The power management system according to claim 5, wherein

each lower power management apparatus periodically transmits, to the upper power management apparatus, the power information including an amount of power consumed for each category to which the load connected to each lower power management apparatus belongs.

8. A power management method applied to a power management system comprising a plurality of lower power management apparatuses each of which is provided for each of a plurality of consumers and an upper power management apparatus that manages the plurality of lower power management apparatuses, comprising:

a step of transmitting, from each lower power management apparatus to the upper power management apparatus, power information including an amount of power consumed by a load connected to each lower power management apparatus; and

a step of transmitting, from the upper power management apparatus to each lower power management apparatus, reduction information including an amount of power that should be reduced in each consumer, in response to a power curtailment signal transmitted from a power company that manages a power grid and the power information.

9. The power management method according to claim 8, wherein

in the step of transmitting the power information, the power information including an amount of power consumed for each category to which the load connected to each lower power management apparatus belongs is transmitted from each lower power management apparatus to the upper power management apparatus.

10. The power management method according to claim 9, further comprising:

a step of reducing, in each lower power management apparatus, power consumed by a load connected to each lower power management apparatus, in response to reduction information received from the upper power management apparatus.

11. The power management method according to claim 10, wherein

the power curtailment signal includes an amount of power that should be reduced from an amount of power currently consumed by a load connected to the power grid.

12. An upper power management apparatus that manages a plurality of lower power management apparatuses each of which is provided for each of a plurality of consumers, comprising:

a reception unit that receives power information including an amount of power consumed by a load connected to each lower power management apparatus, from each lower power management apparatus; and

a transmission unit that transmits, to each lower power management apparatus, reduction information including the amount of power that should be reduced in each consumer, in response to a power curtailment signal transmitted from a power company that manages a power grid and the power information.

13. The upper power management apparatus according to claim 12, wherein

the reception unit receives the power information including an amount of power consumed for each category to which the load connected to each lower power management apparatus belongs, from each lower power management apparatus.

14. The upper power management apparatus according to claim 13, wherein

the power curtailment signal includes an amount of power that should be reduced from an amount of power currently consumed by a load connected to the power grid.