Apparatus and method for predictive control of a power generation system

• US 7,957,845 B2
• Filed: 01/26/2010
• Issued: 06/07/2011
• Est. Priority Date: 03/07/2006
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens Energy Incorporated (Siemens AG)
• Inventors: Chen, Dingguo
• Primary Examiner(s): SHECHTMAN, SEAN P
• Application Number:
  US12/693,487
• Publication Number:
  US 20100114393A1
• Time in Patent Office: 497 Days
• Field of Search: 700/14, 700/16, 700/22, 700 28- 37, 700/44, 700/45, 700/51, 700/54, 700/55, 700/286, 700/287, 700/289, 700/290, 700/297, 700/298, 703/2, 703/18, 702179-182
• US Class Current: 700/286
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A method for controlling a power system control area according to a first and a second control performance standard, wherein operation of the control area determines area control parameter values. The method comprises (a) determining a first compliance target for the first performance standard and a second compliance target for the second performance standard (100/200); (b) determining a first performance standard statistical measure responsive to the control area parameter values from a beginning of a first compliance period to a time at which the first average is determined (108); (c) determining a second performance standard statistical measure responsive to the control area parameter values from a beginning of a second compliance period to a time at which the second average is determined; (d) determining a first area control parameter target responsive to the first performance standard statistical measure (116); (e) determining a second area control parameter target responsive to the second performance standard statistical measure (204); (f) determining a first area control parameter correction responsive to the first area control parameter target and the area control parameter values (150); (g) determining a second area control parameter correction responsive to the second area control parameter target and the area control parameter values (228) and (h) controlling the power system according to one or both of the first and the second area control parameter corrections (154/232).

Claims

1. A method for controlling a power system control area during a plurality of consecutive automatic generation control cycles to ensure compliance with a first control performance standard at an end of a rolling first compliance period and compliance with a second control performance standard at an end of a second fixed compliance period, the method comprising:

(a) determining a clock minute average for an area control error term during a plurality of past clock minutes;

(b) determining a first control performance standard statistical measure from a beginning of the rolling first compliance period to a time at which the first statistical measure is determined, the first control performance standard statistical measure responsive to the clock minute averages for the area control error term;

(c) determining a second control performance standard statistical measure from a beginning of the fixed second compliance period to a time at which the second statistical measure is determined, the second control performance standard statistical measure responsive to the cock minute averages for the area control error term;

(d) determining a first area control error target responsive to the first control performance standard statistical measure;

(e) determining a second area control error target responsive to the second control performance standard statistical measure;

(f) determining a first control performance standard correction value responsive to the first area control error target;

(g) determining a second control performance standard correction value responsive to the second area control error target; and

(h) controlling the power system according to one or both of the first and the second control performance standard corrections values, wherein if both the first and the second control performance standard correction values are in a same direction controlling the power system according to a larger of the first and the second control performance standard correction values, wherein if the first and the second control performance standard correction values are in opposite directions controlling the power system according to the second control performance standard correction value.

2. The method of claim 1 wherein if one of the first and the second control performance standard correction values is substantially zero, the non-zero first or second control performance standard correction value is used according to the step (h).

3. The method of claim 1 wherein the first control performance standard comprises control performance standard 1 and the second control performance standard comprise control performance standard 2.

4. The method of claim 1 wherein the first compliance target comprises 100%, the first compliance period comprises a calendar year, the second compliance target comprises 90% and the second compliance period comprises a calendar month.

5. An apparatus for controlling a power system control area during a plurality of consecutive automatic generation control cycles to ensure compliance with a first control performance standard at an end of a rolling first compliance period and compliance with a second control performance standard at an end of a second fixed compliance period, the apparatus comprising:

a memory for storing area control error values determined from operational of the power system control area;

a first module executable by a processor for determining a first measure of the first control performance standard responsive to the area control error values from a beginning of a first compliance period to the time at which the first measure is determined;

a second module executable by the processor for determining a second measure of the second control performance standard responsive to the area control error values from a beginning of a second compliance period to the time at which the second measure is determined;

a third module executable by the processor for determining a first area control error target responsive to the first measure and to a compliance target for the first control performance standard, and for determining a second area control error target responsive to the second measure and to a compliance target for the second control performance standard;

a fourth module executable by the processor for determining a first control performance standard correction value responsive to the first area control error target and for determining a second control performance standard correction value responsive to the second area control error target; and

a fifth module executable by the processor for controlling the power system control area according to one or both of the first and the second control performance standard correction values, wherein if both the first and the second control performance standard correction values are in a same direction, controlling the power system according to a larger of the first and the second control performance standard correction values, wherein if the first and the second control performance standard correction values are in opposite directions, controlling the power system according to the second control performance standard correction value.

6. The apparatus of claim 5 wherein the operation comprises actual and scheduled incoming and outgoing power flows and actual and scheduled interconnection frequency.

7. The apparatus of claim 5 wherein if one of the first and the second control performance standard correction values is substantially zero, a non-zero first or second control performance standard correction value is used by the fifth module.

8. The apparatus of claim 5 wherein the first control performance standard comprises control performance standard 1 and the second control performance standard comprises control performance standard 2.

9. The apparatus of claim 5 wherein the compliance target for the first control performance standard comprises 100%, the first compliance period comprises a calendar year, the compliance target for the second control performance standard comprises 90% and the second compliance period comprises a calendar month.

10. The apparatus of claim 5 wherein the first and the second measures are determined from the beginning of the respective first and second compliance periods to a time t, wherein the fourth module executable by the processor determines the first area control parameter correction responsive to the first area control parameter target and the area control parameter values to the time t and determines the second area control parameter correction responsive to the second area control parameter target and the area control parameter values to the time t.

11. A computer program product for controlling a power system control area during a plurality of consecutive automatic generation cycles to ensure compliance with a first control performance standard at an end of a rolling first compliance period and compliance with a second control performance standard at an end of a second fixed compliance period, the computer program product comprising:

a computer usable medium having computer readable program code modules embodied in the medium for controlling the power system control area;

a computer readable first program code module for determining a clock minute average for an area control error term during a plurality of clock minutes;

a computer readable second program code module for determining a first control performance standard statistical measure from a beginning of the rolling first compliance period to a time at which the first statistical measure is determined, the first control performance standard statistical measure responsive to the clock minute averages for the area control error term;

a computer readable third program code module for determining a second control performance standard statistical measure from a beginning of the second compliance period to a time at which the second statistical measure is determined, the second control performance standard statistical measure responsive to the clock minute averages for the area control error term;

a computer readable fourth program code module for determining a first area control error target responsive to the first performance standard statistical measure;

a computer readable fifth program code module for determining a second area control error target responsive to the second performance standard statistical measure;

a computer readable sixth program code module for determining a first control performance standard correction value responsive to the first area control error target;

a computer readable seventh program code module for determining a second control performance standard correction value responsive to the second area control error target;

a computer readable eighth program code module for controlling the power system according to one or both of the first and the second area control performance standard correction value, wherein if both the first and the second control performance standards correction values are in the same direction, controlling the power system according to a larger of the first and the second control performance standard correction values, wherein if the first and the second control performance standard values are in opposite directions controlling the power system according to the second control performance standard correction value.