POWER MANAGEMENT SYSTEM, POWER MANAGEMENT METHOD, AND NETWORK SERVER

• US 20140236376A1
• Filed: 09/04/2012
• Published: 08/21/2014
• Est. Priority Date: 09/26/2011
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: Joko, Shingo
• Granted Patent: US 9,830,671 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H02J 2310/52 The controlling of the operation of the load not being the total disconnection of the load, i.e. entering a degraded mode or in current limitation
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/144 Demand-response operation of the power transmission or distribution network
• 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 10 and CEMSs 40. The CEMS 40 receives, from each HEMS 10, power information including the amount of power consumed by a load connected to each HEMS 10. The CEMS 40 transmits, to each HEMS 10, reduction information including the amount of power that should be reduced in each consumer, in response to a curtailment signal and the power information.

Claims

1. A power management system comprising a plurality of power management apparatuses each of which is provided in each of a plurality of consumers and a network server connected to the plurality of power management apparatuses via a network, wherein

each power management apparatus transmits, to the network server, power information including the amount of power consumed by a load connected to each power management apparatus and a curtailment signal transmitted from a power company that manages a power grid, and

the network server transmits, to each power management apparatus, reduction information including the amount of power that should be reduced in each consumer, in response to the curtailment signal and the power information.

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

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

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

each power management apparatus reduces power consumed by the load connected to each power management apparatus, in response to the reduction information received from the network server.

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

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

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

the category has a priority, and

the network server decides the 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 lower priority.

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

the network server decides the 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. A power management method applied to a power management system comprising a plurality of power management apparatuses each of which is provided in each of a plurality of consumers and a network server that manages the plurality of power management apparatuses, comprising:

a step of transmitting, from each power management apparatus to the network server, power information including the amount of power consumed by a load connected to each power management apparatus and a curtailment signal transmitted from a power company that manages a power grid; and

a step of transmitting, from the network server to each power management apparatus, reduction information including the amount of power that should be reduced in each consumer, in response to the curtailment signal and the power information, wherein

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

8. The power management method according to claim 7, wherein

in the step of transmitting the power information and the curtailment signal, the power information including an amount of power consumed for each category to which the load connected to each power management apparatus belongs is transmitted from each power management apparatus to the network server.

9. The power management method according to claim 8, further comprising

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

10. A network server connected to a plurality of power management apparatuses each of which is provided in each of a plurality of consumers via a network, comprising:

a reception unit that receives, from each power management apparatus, power information including the amount of power consumed by a load connected to each power management apparatus and a curtailment signal transmitted from a power company that manages a power grid; and

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

11. The network server according to claim 10, wherein

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

12. The network server according to claim 11, wherein

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