Method, system and apparatus for load shaving of a power grid and a tangible computer readable medium

• US 9,424,613 B2
• Filed: 03/01/2013
• Issued: 08/23/2016
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Accenture Global Services Limited (Accenture PLC)
• Original Assignee: Accenture Global Services Limited (Accenture PLC)
• Inventors: Huang, Yuteng, Hou, Fang, Zhou, Qin, Yang, Zhihui, Wang, Yufei
• Primary Examiner(s): Bahta, Kidest
• Application Number:
  US13/782,726
• Publication Number:
  US 20140074304A1
• Time in Patent Office: 1,271 Days
• Field of Search: 700/297, 700/286, 700/276, 705/412
• US Class Current: 1/1
• CPC Class Codes: G05F 5/00 Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
• CPC Class Codes: G06Q 50/06 Energy or water supply
• 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 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• 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

The present disclosure provides a system, method and apparatus for load shaving of a power grid, and a tangible computer readable medium. The system may comprise at least one processor; and at least one memory storing computer executable instructions. The at least one memory and computer executable instructions may be configured to, with the at least one processor, cause the system to profile behavior data for power customers to divide the power customers into at least one group; define, based on usage characteristic of each of the at least one group, a possible load shaving strategy for each of the at least one group; and perform load shaving analysis at least under constraint of the possible load shaving strategy for each of the at least one group, to provide a recommended load shaving strategy for each of the power customers.

Claims

1. A system for load shaving of a power grid, comprising:

at least one memory storing computer executable instructions;

at least one processor configured to be in communication with the memory; and

wherein the at least one processor executes the computer executable instructions, causing the system to;

form customer load profiles from behavior data of a plurality of power customers;

divide the power customers into a plurality of respective groups based on a comparison of the customer load profiles;

generate a load profile for each of the respective groups;

determine a respective peak-valley ratio for the load profile of each of the respective groups;

determine a respective correlation coefficient between the load profile for each of the respective groups and a system load profile for all the groups;

generate, based on the respective peak-valley ratio and the respective correlation coefficient of each of the respective groups, a plurality of respective load shaving strategies for each of the respective groups;

select, based on an optimization objective, a load shaving strategy for a power customer in one of the respective groups from the generated respective load shaving strategies for that respective group; and

generate load shaving for the power grid based on the selected load shaving strategy.

2. The system of claim 1, wherein the behavior data for power customers comprise time series data.

3. The system of claim 2, wherein the time series data comprise one or more of load curves and energy consumption amount during each time interval.

4. The system of claim 1, wherein a peak demand of the power customers is at least 50 KVA.

5. The system of claim 1, wherein at least one of the respective load shaving strategies comprises at least one of load shifting or load clipping.

6. The system of claim 1, wherein executing the computer executable instructions causes the system to generate the load shaving strategies for each of the respective groups by:

determining one of the load shaving strategies as load clipping if the respective correlation coefficient is more than or equal to a predefined value and the respective peak-valley ratio is lower than a first predefined threshold;

determining one of the load shaving strategies as both load clipping and load shifting if the respective correlation coefficient is more than or equal to the predefined value and the respective peak-valley ratio is higher than or equal to the first predefined threshold;

determining one of the load shaving strategies as not involving load shaving if the respective correlation coefficient is less than the predefined value and the respective peak-valley ratio is higher than a second predefined threshold; and

determining one of the load shaving strategies as load clipping if the respective correlation coefficient is less than the predefined value and the respective peak-valley ratio is lower than or equal to the second predefined threshold.

7. The system of claim 6, wherein executing the computer executable instructions further causes the system to:

check supply priority of the power customers; and

the optimization objective includes an avoidance of load shaving for either power customers with a high supply priority or power customers who are public service customers.

8. The system of claim 1, wherein the optimization objective is based on at least one of a supply reliability or a customer satisfaction.

9. The system of claim 1, wherein the optimization objective includes an accommodation of at least one constraint to selection of the load shaving strategy from a group of constraints consisting of:

a customer enrolling in only one load shaving strategy;

loads to be clipped at a time interval not exceeding a maximum load change rate;

loads to be shifted being equal to the difference between load values after shifting and before shifting;

loads after optimization being between a minimum load and a maximum load;

no increase in daily power consumption for each customer participating in load clipping;

no increase in load of peak period for the whole power system and no decrease in load of valley period; and

increased load amount at each time interval for the system load of less than the spinning reserve of the whole system.

10. The system of claim 1, wherein at least one of the load shaving strategies does not involve load shaving.

11. The system of claim 1, wherein the comparison of the customer load profiles comprises the at least one processor executing the computer executable instructions to compare respective load curves of each of the customer load profiles.

12. The system of claim 1, wherein the computer executable instruction causing the system to divide the power customers into the plurality of respective groups further cause the system to form the respective groups based on a predetermined type of each of the customer load profiles, wherein the predetermined type of each of the customer load profiles comprises a reverse type, a smooth type, and a volatile type.

13. A method of load shaving of a power grid, the method comprising:

forming, using a processor, customer load profiles from behavior data of a plurality of power customers;

dividing, using the processor, the power customers into a plurality of respective groups based on a comparison of the customer load profiles;

generating, using the processor, a respective load profile of each of the respective groups;

determining, using the processor, a respective peak-valley ratio for each of the respective groups;

determining, using the processor, a respective correlation coefficient between the respective load profile of each of the respective groups and a system load profile of all the respective groups;

generating using the processor, a plurality of respective load shaving strategies for each of the respective groups, each of the plurality of respective load shaving strategies based on the respective peak-valley ratio and the respective correlation coefficient of each of the respective groups;

selecting, using the processor, a load shaving strategy for a power customer in one of the respective groups from the generated respective load shaving strategies for that respective group, wherein the respective load shaving strategy is selected based on an optimization objective; and

generating, using the processor, load shaving for the power grid based on the selected load shaving strategy.

14. The method of claim 13, wherein the behavior data for power customers comprise time series data.

15. The method of claim 14, wherein the time series data comprise one or more of load curves and energy consumption amount during each time interval.

16. The method of claim 13, wherein a peak demand of the power customers is at least 50 KVA.

17. The method of claim 13, wherein at least one of the load shaving strategies comprises

load shifting and

load clipping.

18. The method of claim 13, wherein generating the load shaving strategies for each of the respective groups comprises:

determining one of the load shaving strategies as load clipping if the respective correlation coefficient is more than or equal to a predefined value and the respective peak-valley ratio is lower than a first predefined threshold;

determining one of the load shaving strategies as both load clipping and load shifting if the respective correlation coefficient is more than or equal to the predefined value and the respective peak-valley ratio is higher than or equal to the first predefined threshold;

determining one of the load shaving strategies as not involving load shaving if the respective correlation coefficient is less than the predefined value and the respective peak-valley ratio is higher than a second predefined threshold; and

determining one of the load shaving strategies as load clipping if the respective correlation coefficient is less than the predefined value and the respective peak-valley ratio is lower than or equal to the second predefined threshold.

19. The method of claim 18, wherein the optimization objective includes

not involving the load shaving if either a supply priority of a the power customer is high or the power customer is a public service customer.

20. The method of claim 13, wherein:

the optimization objective includes at least one objective based on a supply reliability, and a customer satisfaction.

21. The method of claim 20, wherein the optimization objective includes an accommodation of at least one constraint to selecting the load shaving strategy from a group of constraints consisting of:

a customer enrolling in only one load shaving strategy;

loads to be clipped at a time interval not exceeding a maximum load change rate;

loads to be shifted being equal to a difference between load values after shifting and before shifting; and

loads after optimization being between a minimum load and a maximum load;

daily power consumption not increasing for each customer participating in load clipping;

load of peak period for the whole power system not increasing and load of valley period for the whole power system not decreasing; and

increased load amount at each time interval for the system load not being less than a spinning reserve of the whole system.

22. A tangible computer-readable medium storing a plurality of instructions executable by a processor to manage a load of a power grid, wherein a processor is configured to execute the instructions to perform the steps of the method of claim 13.

23. The method of claim 13, wherein at least one of the load shaving strategies does not involve load shaving.

24. The method of claim 13, wherein the comparison of the customer load profiles comprises comparing respective load curves of each of the customer load profiles.

25. The method of claim 13, wherein dividing, using the processor, the power customers into the plurality of respective groups further comprises the step of forming, using the processor, the respective groups based on a predetermined type of each of the customer load profiles, wherein the predetermined type of each of the customer load profiles comprises a reverse type, a smooth type, and a volatile type.

26. The method of claim 25 wherein each of the plurality of respective load shaving strategies is further based on a predetermined type of the respective load profile of each of the respective groups, wherein the predetermined type of the respective load profile of each of the respective groups comprises a reverse type, a smooth type, and a volatile type.

27. An apparatus for load shaving of a power grid, the apparatus comprising:

circuitry to form customer load profiles from behavior data of a plurality of power customers;

circuitry to divide the power customers into a plurality of respective groups based on a comparison of the customer load profiles;

circuitry to generate a respective load profile for each of the respective groups;

circuitry to determine a respective peak-valley ratio for each of the respective groups;

circuitry to determine a respective correlation coefficient between the respective load profile for each of the respective groups and a system load profile for all the groups;

circuitry to generate, based on the respective peak-valley ratio and the respective correlation coefficient of each of the respective groups, a plurality of respective load shaving strategies for each of the respective groups;

circuitry to select, based on an optimization objective, a load shaving strategy for a power customer in one of the respective groups from the generated respective load shaving strategies for that respective group; and

circuitry to generate load shaving for the power grid based on the selected load shaving strategy.

28. The apparatus of claim 27, wherein at least one of the load shaving strategies does not involve load shaving.

29. The apparatus of claim 27, wherein the comparison of the customer load profiles comprises comparison of a respective load curve of each of the customer load profiles.

30. The apparatus of claim 27, wherein the circuitry to divide the power customers into the plurality of respective groups further comprises circuitry to form the respective groups based on a predetermined type of each of the customer load profiles, wherein the predetermined type of each of the customer load profiles comprises a reverse type, a smooth type, and a volatile type.