Apparatus and method for analyzing power plant water chemistry

• US 5,724,254 A
• Filed: 01/18/1996
• Issued: 03/03/1998
• Est. Priority Date: 01/18/1996
• Status: Expired due to Term

• Current Assignee: Electric Power Research Institute Incorporated
• Original Assignee: Electric Power Research Institute
• Inventors: Millett, Peter J., Brobst, Gary E., Burns, Gary D.
• Primary Examiner(s): Ramirez, Ellis B.
• Assistant Examiner(s): KEMPER, MELANIE A
• Application Number:
  US08/588,194
• Time in Patent Office: 775 Days
• Field of Search: 364/496, 364/497, 364/500, 364/578, 395/911, 395/915, 395/914, 395/902, 395/50, 395/1, 395/11, 395/22
• US Class Current: 702/179
• CPC Class Codes: G01N 33/18 Water
• CPC Class Codes: G06F 18/24765 Rule-based classification
• CPC Class Codes: G06F 2219/00 Indexing scheme relating to application aspects of data processing equipment or methods

Abstract

A power plant water chemistry analysis apparatus and method relies upon water chemistry sensors to obtain power plant water chemistry data characterizing the chemical activity of a power plant water system. An analytical model processor is used to generate model predictions for the power plant water system. A statistical data fitting processor selects screened data from the power plant water chemistry data that corresponds to the model predictions. The screened data is processed by an artificial intelligence processor to derive power plant water chemistry diagnostic information. The artificial intelligence processor includes an expert system, rule base, plant water chemistry system simulator, and pattern recognition module.

Claims

1. A power plant water chemistry analysis apparatus, comprising:

water chemistry sensors to obtain power plant water chemistry data characterizing the chemical activity of a power plant water system;

an analytical model processor to generate model predictions for said power plant water system; and

an artificial intelligence processor to process said power plant water chemistry data and said model predictions, which in combination constitute over specified system data with more known power plant water chemistry data than unknown model predictions, said artificial intelligence processor generating power plant water chemistry diagnostic information from said over specified system data.

2. The apparatus of claim 1 wherein said artificial intelligence processor includes a power plant water chemistry system simulator to process said over specified system data.

3. The apparatus of claim 1 further comprising:

a statistical data fitting processor to select screened data from said over specified system data.

4. The apparatus of claim 3 wherein said statistical data fitting processor determines the statistical best fit of said power plant water chemistry data that satisfy the constraints given by said model predictions.

5. The apparatus of claim 1 wherein said artificial intelligence processor includes a rule base to process said over specified system data.

6. The apparatus of claim 1 wherein said artificial intelligence processor further includes a pattern recognition module to process said over specified system data.

7. A computer readable memory to direct a computer to function in a specified manner, comprising:

power plant water chemistry data characterizing the chemical activity of a power plant water system;

model predictions for said power plant water system; and

executable instructions stored in said memory, said executable instructions including instructions to process said power plant water chemistry data and said model predictions, which in combination constitute over specified system data with more known power plant water chemistry data than unknown model predictions, to generate power plant water chemistry diagnostic information from said over specified system data.

8. The apparatus of claim 7 wherein said executable instructions include instructions defining a power plant water chemistry system simulator to process said over specified system data.

9. The apparatus of claim 7 wherein said executable instructions include instructions defining a statistical data fitting processor to select screened data from said over specified system data.

10. The apparatus of claim 7 wherein said executable instructions include instructions defining a rule base to process said over specified system data.

11. The apparatus of claim 7 wherein said executable instructions include instructions defining a pattern recognition module to process said over specified system data.

12. A method of analyzing power plant water chemistry, said method comprising the steps of:

accumulating power plant water chemistry data characterizing the chemical activity of a power plant water system;

generating model predictions for said power plant water system; and

deriving power plant water chemistry diagnostic information from said power plant water chemistry data and said model predictions, which in combination constitute over specified system data with more known power plant water chemistry data than unknown model predictions.

13. The method of claim 12 further comprising the step of selecting screened data from said over specified system data.

14. The method of claim 12 wherein said deriving step includes the step of processing said over specified system data with a rule base.

15. The method of claim 12 wherein said deriving step includes the step of processing said over specified system data with a power plant water chemistry system simulator.

16. The method of claim 12 wherein said deriving step includes the step of processing said over specified system data with a pattern recognition module.