LOAD SCHEDULING OPTIMIZATION IN DISTRIBUTED SYSTEM

• US 20120109400A1
• Filed: 05/12/2010
• Published: 05/03/2012
• Est. Priority Date: 06/26/2009
• Status: Active Grant

• Current Assignee: Hitachi Energy Limited (Hitachi, Ltd.)
• Original Assignee: ABB Technology Limited (ABB Ltd.)
• Inventors: Narayanan, Venkateswaran, Sundaram, Senthil Kumar, Selvaraj, Gopinath, Kundanagar, Rohini Suresh
• Granted Patent: US 9,634,488 B2
• Time in Patent Office: Days
• US Class Current: 700/296
• CPC Class Codes: G06Q 10/04 Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" market predictions or forecasting for commercial activities G06Q30/0202
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 13/00018 using phone lines
• CPC Class Codes: H02J 13/00024 by means of mobile telephony
• CPC Class Codes: H02J 13/00026 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
• CPC Class Codes: H02J 13/00028 involving the use of Internet protocols
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 3/144 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: 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

Abstract

A power distribution management system is disclosed for optimal power distribution for a predetermined class of loads and other loads. The power distribution management system include a substation for distributing power supply to a load network, where the load network includes the predetermined class of loads and other loads and the substation includes a plurality of feeders. The power distribution management system includes an optimizer for generating an optimal load schedule for a control period for the predetermined class of loads. The power distribution management system also includes a communication interface for communicating between the plurality of individual loads and/or the optimizer.

Claims

1. A power distribution management system comprising:

a substation for distributing power supply to a load network having a predetermined class of loads and other loads, the substation comprising;

a plurality of feeders;

an optimizer for load scheduling for the predetermined class of loads; and

a communication interface for communication with the plurality of individual loads and/or the optimizer, wherein the predetermined class of loads comprise a plurality of individual loads.

2. The power distribution management system of claim 1 wherein a power supply quota is assigned for the predetermined class of loads.

3. The power distribution management system of claim 2 wherein the optimizer maximizes the power supply quota to generate an optimal load schedule for the pre-determined class of loads.

4. The power distribution management system of claim 3, wherein at least one individual load from the plurality of individual loads is operated based on the optimal load schedule.

5. The power distribution management system of claim 3 wherein the power distribution management system reconfigures one or more feeders distributing power supply to the load network based on the optimal load schedule.

6. The power distribution management system of claim 3 wherein the optimizer uses one or more constraints selected from a group consisting of power allowance constraint, total on-time constraint, minimum on-time constraint, and time varying load constraint, to generate the optimal load schedule.

7. The power distribution management system of claim 1 wherein the optimizer is integral to at least one of a power distribution network management system, a substation management system in the substation or both the power distribution network management system and a substation management system.

11. The power distribution management system of claim 1 comprising:

registering identity information of individual loads from the pre-determined class of loads via the communication interface, wherein the identity information of individual loads from the pre-determined class of loads is archived and stored.

12. The power distribution management system of claim 11 wherein the identity information of individual loads comprises:

at least information on a type and rating of an individual load and information on the communication device.

13. The power distribution management system of claim 5, wherein the optimizer is configured to ensure that at least one feeder associated with the pre-determined class of loads is always available to supply power to the predetermined class of loads.

14. The power distribution management system of claim 1 wherein the power distribution management system receives at least one of identity information, power requirement information, power utilized information or a combination thereof, from at least one of the plurality of individual loads.

15. The power distribution management system of claim 1 wherein the power distribution management system sends at least one of an optimal schedule information, tariff information, information for approval, instruction to operate information or the combination thereof, to at least one of a plurality of individual loads.

16. The power distribution management system of claim 1, in combination with the load network having the predetermined class of loads and other loads.

8. A method for load scheduling, the method comprising:

receiving information for a power supply quota for a predetermined class of loads for a control period;

receiving information for power demand by individual loads of the predetermined class of loads;

deriving an optimized power distribution solution for the power supply quota for the predetermined class of loads using the information for power demand by individual loads;

generating an optimal load schedule for individual loads in the predetermined class of loads; and

managing a plurality of feeders for power distribution to the predetermined class of loads and other loads based on the optimal load schedule.

9. The method for load scheduling of claim 8 comprising:

communicating the optimal load schedule to the individual loads;

receiving feedback from respective users of the individual loads; and

using the feedback from the respective users of the individual loads to generate a final optimal load schedule.

10. The method of claim 8 wherein the power distribution to the other loads is based on pre-defined priorities.