SYSTEMS, METHODS AND APPARATUS FOR IMPROVED REGULATION OF ENERGY DELIVERY SYSTEMS

• US 20160149409A1
• Filed: 03/24/2015
• Published: 05/26/2016
• Est. Priority Date: 11/21/2014
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Chen, Dingguo, York, Michael E.
• Granted Patent: US 9,893,523 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: H02J 3/46 Controlling of the sharing of output between the generators, converters, or transformers
• CPC Class Codes: H02J 3/48 Controlling the sharing of the in-phase component
• 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

Abstract

Embodiments provide systems, methods and apparatus for controlling an energy delivery system including providing an energy management system (EMS) having an automatic generation control (AGC) system including a load frequency control (LFC) module and an economic dispatch (ED) module; determining a regulation requirement based upon a predefined set of nested system control zones and a current area control error (ACE); determining regulation allocation based on a pre-defined set of gain factors associated with the nested system control zones; and implementing corrections to the operation of the energy delivery system based upon solution results of the determined regulation allocation. Numerous other aspects are provided.

Claims

1. A method of controlling an energy delivery system, the method comprising:

providing an energy management system (EMS) having an automatic generation control (AGC) system including a load frequency control (LFC) module and an economic dispatch (ED) module;

determining a regulation requirement based upon a predefined set of nested system control zones and a current area control error (ACE);

determining regulation allocation based on a pre-defined set of gain factors associated with the nested system control zones; and

implementing corrections to the operation of the energy delivery system based upon solution results of the determined regulation allocation.

2. The method of claim 1 wherein the nested system control zones include a no-regulation zone, a regulation zone, a permissive zone, and an emergency zone.

3. The method of claim 2 wherein when the ACE is within the no-regulation zone, system generation is entirely dispatched, no regulation is required, and no regulation is allocated.

4. The method of claim 2 wherein when the ACE is within the regulation zone, active power regulation is applied to progressively move units to bring the system to a desired system condition.

5. The method of claim 2 wherein when the ACE is within the permissive zone, active power regulation is applied to progressively move units to bring the system to a desired system condition but any movements that deteriorate the ACE are blocked.

6. The method of claim 2 wherein the gain factor associated with the emergency zone is tuned to bring the energy delivery system back to the no-regulation zone in a minimum amount of time.

7. The method of claim 2 wherein the gain factor associated with the permissive zone is tuned to bring the energy delivery system back to the regulation zone.

8. The method of claim 2 wherein the gain factor associated with the regulation zone is tuned to bring the energy delivery system back to the no-regulation zone.

9. An energy management system (EMS) comprising:

a process controller;

a memory coupled to the process controller and storing instructions executable on the process controller, the instructions operable to;

determine a regulation requirement based upon a predefined set of nested system control zones and a current area control error (ACE);

determine regulation allocation based on a pre-defined set of gain factors associated with the nested system control zones; and

implement corrections to operation of an energy delivery system based upon solution results of the determined regulation allocation.

10. The EMS of claim 9 wherein the instructions are further operable to define the nested system control zones to include a no-regulation zone, a regulation zone, a permissive zone, and an emergency zone.

11. The EMS of claim 10 wherein the instructions are further operable to cause system generation to be entirely dispatched, no regulation is required, and no regulation is allocated when the ACE is within the no-regulation zone.

12. The EMS of claim 10 wherein the instructions are further operable to cause active power regulation to be applied to progressively move units to bring the system to a desired system condition when the ACE is within the regulation zone.

13. The EMS of claim 10 wherein the instructions are further operable to cause active power regulation to be applied to progressively move units to bring the system to a desired system condition but any movements that deteriorate the ACE are blocked when the ACE is within the permissive zone.

14. The EMS of claim 10 wherein the gain factor associated with the emergency zone is tuned to bring the energy delivery system back to the no-regulation zone in a minimum amount of time.

15. The EMS of claim 10 wherein the gain factor associated with the permissive zone is tuned to bring the energy delivery system back to the regulation zone.

16. The EMS of claim 10 wherein the gain factor associated with the regulation zone is tuned to bring the energy delivery system back to the no-regulation zone.

17. A load frequency control (LFC) module within an automatic generation control (AGC) system, the LFC module comprising:

a LFC application operative to execute on a process controller to generate an output data structure and to store solution results in an operational database of an EMS; and

a regulation optimization engine operable to execute on the process controller to receive input data, execute functions called by the LFC application for allocating area regulation among area regulating units, and to populate the output data structure with solution results,

wherein biased effective limits of each potential regulating unit are calculated during economic allocation of regulation.

18. The LFC module of claim 17 wherein the area regulation is allocated based on the units'"'"' designation for regulation.

19. The LFC module of claim 18 wherein a unit that contributes regulation is designated as at least one of a regulating unit and an assisted regulating unit.

20. The LFC module of claim 19 wherein the assisted regulating units are used when a total regulation contribution from all the regulating units is not sufficient to meet the area regulation.