System and method for allocating power to loads

• US 8,446,040 B2
• Filed: 08/30/2010
• Issued: 05/21/2013
• Est. Priority Date: 09/28/2004
• Status: Active Grant

• Current Assignee: Schneider Electric IT Corporation (Schneider Electric SE)
• Original Assignee: Schneider Electric USA, Inc. (Schneider Electric SE)
• Inventors: Paik, Nam Wook, Haines, Lance Palmer, Deokar, Vishwas Mohaniraj, Donalds, James H., Manganese, Michael
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): VU, TOAN T
• Application Number:
  US12/871,425
• Publication Number:
  US 20110049980A1
• Time in Patent Office: 995 Days
• Field of Search: 307/64, 307/66, 700/293, 700/295
• US Class Current: 307/64
• CPC Class Codes: H01H 2300/018 Application transfer; between utility and emergency power supply circuits in H02J9/04
• CPC Class Codes: H02J 2310/58 The condition being electrical
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/20 End-user application control systems
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/248 UPS systems or standby or emergency generators

Abstract

A system and method for adaptive control of power among a plurality of loads based on a categorization of the loads as either delayable or non-delayable, wherein the non-delayable loads are preferably supplied power over the delayable loads. In one aspect, the system may be used to allocate limited power from a backup power source.

Claims

1. A method for controlling power supplied to a plurality of loads, the method comprising:

recording power requirements of each one of the plurality of loads;

categorizing the plurality of loads into one of a first group identified as delayable loads and a second group identified as non-delayable loads;

allocating power from a power source to each load in the second group of loads; and

allocating any remaining power from the power source to loads in the first group of loads,

wherein allocating any remaining power to loads in the first group includes, in a first mode of operation, selecting loads from the first group, based on the power requirements of each one of the loads, to maximize a number of loads that are powered in the first group without overloading the power source.

2. The method of claim 1, further comprising monitoring the plurality of loads in real-time and dynamically allocating the remaining power to the loads in the first group of loads.

3. The method of claim 2, wherein dynamically allocating includes characterizing each load in terms of peak power and steady-state power.

4. The method of claim 1, wherein at least one of the loads in the second group of loads is characterized as operable with one type of power source and wherein allocating power to the at least one load includes allocating power from only the one type of power source.

5. The method of claim 1, wherein categorizing the plurality of loads includes for each load identifying a load type, and using a default setting to categorize each load based on the load type.

6. The method of claim 5, further comprising allowing a user to change the default setting.

7. The method of claim 1, wherein categorizing the loads includes for each load identifying a load type, and wherein the method further comprises:

assigning a maximum delay time for at least one of the delayable loads; and

setting default values for electrical parameters for each load based on the load type.

8. The method of claim 7, wherein the electrical parameters include a surge power rating and a steady state power rating.

9. The method of claim 7, further comprising allowing a user to change the default values for the electrical parameters.

10. The method of claim 7, further comprising updating values of the electrical parameters based on measured values.

11. The method of claim 1, further comprising monitoring power use to the plurality of loads while the plurality of loads are operating from a primary source of power, and providing a recommendation for a back-up source of power based on the power use.

12. The method of claim 1, wherein allocating any remaining power to loads in the first group further includes, in a second mode of operation, detecting that a back-up power source including a storage element is providing power to loads in the first group, and selecting loads from the first group to maximize runtime of the back-up power source.

13. A method for controlling power supplied to a plurality of loads, the method comprising:

recording power requirements of each one of the plurality of loads;

categorizing the plurality of loads into one of a first group identified as delayable loads and a second group identified as non-delayable loads;

allocating power from a power source to each load in the second group of loads; and

allocating any remaining power from the power source to loads in the first group of loads,

wherein allocating any remaining power to loads in the first group includes, in a first mode of operation, selecting loads from the first group, based on the power requirements of each one of the loads, to maximize power drawn from the power source without exceeding an output capacity of the power source.

14. The method of claim 13, further comprising monitoring the plurality of loads in real-time and dynamically allocating the remaining power to the loads in the first group of loads.

15. The method of claim 14, wherein dynamically allocating includes characterizing each load in terms of peak power and steady-state power.

16. The method of claim 13, wherein at least one of the loads in the second group of loads is characterized as operable with one type of power source and wherein allocating power to the at least one load includes allocating power from only the one type of power source.

17. The method of claim 13, wherein categorizing the plurality of loads includes for each load identifying a load type, and using a default setting to categorize each load based on the load type.

18. The method of claim 13, wherein categorizing the loads includes for each load identifying a load type, and wherein the method further comprises:

assigning a maximum delay time for at least one of the delayable loads; and

setting default values for electrical parameters for each load based on the load type.

19. The method of claim 13, further comprising monitoring power use to the plurality of loads while the plurality of loads are operating from a primary source of power, and providing a recommendation for a back-up source of power based on the power use.

20. The method of claim 13, wherein allocating any remaining power to loads in the first group further includes, in a second mode of operation, detecting that a back-up power source including a storage element is providing power to loads in the first group, and selecting loads from the first group to maximize runtime of the back-up power source.