Power control system

• US 8,860,253 B2
• Filed: 04/17/2012
• Issued: 10/14/2014
• Est. Priority Date: 04/21/2011
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Oka, Ryuji
• Primary Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US14/112,100
• Publication Number:
  US 20140035374A1
• Time in Patent Office: 910 Days
• Field of Search: 307/52, 307/66, 307/80, 307/85, 307/86
• US Class Current: 307/80
• CPC Class Codes: G06Q 30/0283 Price estimation or determination
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid
• CPC Class Codes: Y04S 50/14 Marketing, i.e. market research and analysis, surveying, promotions, advertising, buyer profiling, customer management or rewards

Abstract

To provide a power control system which evaluates an applied control pattern over a period of a certain length or more, so as to be used for the subsequent control with a configuration in which a discharge start time and output of an electric storage device are changed.

Claims

1. A power control system for a building including a solar power generator and a power storage device, comprising:

initial setting means for setting a calculation condition required for control of the solar power generator and the power storage device;

measurement means for measuring a power generation amount of the solar power generator and a power consumption of the building;

power price-setting means for setting a power price which changes in accordance with a time and a purchase price that an electric power company pays to purchase the power generated by the solar power generator;

control pattern storage means for storing a plurality of control patterns with a discharge start time of the power storage device as a variable factor;

calculation period-setting means for setting a past calculation period which is a standard for calculating an electric power charge of the building;

electric power charge calculation means for calculating each electric power charge by performing simulation based on each of the control patterns with a past measurement value measured by the measurement means and the power price set by the power price-setting means for the building in the calculation period;

control pattern selection means for selecting one control pattern by evaluating a calculation value calculated by the electric power charge calculation means with a predetermined standard; and

a controller which performs control after the calculation in accordance with the control pattern selected by the control pattern selection means.

2. The power control system according to claim 1, wherein the control pattern storage means stores the control pattern with a magnitude of output of the power storage device as a variable factor.

3. The power control system according to claim 1, wherein the plurality of control patterns includes a control pattern in which a discharge start time of the power storage device is changed per unit time.

4. The power control system according to claim 2, wherein the magnitude of the output of the power storage device is changed with respect to each time.

5. The power control system according to claim 4, wherein the plurality of control patterns includes a control pattern which controls the output of the power storage device just after the discharge start, and increases the output thereafter.

6. The power control system according to claim 1, wherein the calculation period is a length of 15-60 days.

7. The power control system according to claim 1, wherein the control pattern selection means evaluates based on a low electric power charge calculated by the electric power charge calculation means.

8. The power control system according to claim 1, wherein the control pattern is selected by the control pattern selection means at constant period intervals by the control pattern selection means.

9. The power control system according to claim 1, wherein the control pattern is selected by the control pattern selection means at intervals having a length which is the same as the calculation period.

10. The power control system according to claim 2, wherein the plurality of control patterns includes a control pattern in which a discharge start time of the power storage device is changed per unit time.

11. The power control system according to claim 2, wherein the calculation period is a length of 15-60 days.

12. The power control system according to claim 3, wherein the calculation period is a length of 15-60 days.

13. The power control system according to claim 4, wherein the calculation period is a length of 15-60 days.

14. The power control system according to claim 5, wherein the calculation period is a length of 15-60 days.

15. The power control system according to claim 10, wherein the calculation period is a length of 15-60 days.

16. The power control system according to claim 2, wherein the control pattern selection means evaluates based on a low electric power charge calculated by the electric power charge calculation means.

17. The power control system according to claim 3, wherein the control pattern selection means evaluates based on a low electric power charge calculated by the electric power charge calculation means.

18. The power control system according to claim 10, wherein the control pattern selection means evaluates based on a low electric power charge calculated by the electric power charge calculation means.

19. The power control system according to claim 2, wherein the control pattern is selected by the control pattern selection means at constant period intervals by the control pattern selection means.

20. The power control system according to claim 2, wherein the control pattern is selected by the control pattern selection means at intervals having a length which is the same as the calculation period.