Power plant operation control system and a power plant maintaining and managing method

• US 6,980,891 B2
• Filed: 06/28/2004
• Issued: 12/27/2005
• Est. Priority Date: 06/22/2000
• Status: Expired due to Fees

• Current Assignee: mitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Hitachi, Ltd.
• Inventors: Nagafuchi, Naoyuki, Iwai, Yasushi, Ikeda, Hiraku
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): SHECHTMAN, SEAN P
• Application Number:
  US10/876,562
• Publication Number:
  US 20040254684A1
• Time in Patent Office: 547 Days
• Field of Search: 700/12, 700 14- 17, 700/19, 700/21, 700/22, 700/30, 700/47, 700/50, 700/83, 700/286, 700/287, 700292-298, 700/9, 702 57- 62, 702/64, 702/65, 702182-185, 715963-968, 715/970, 715/971
• US Class Current: 700/286
• CPC Class Codes: G05B 13/042 in which a parameter or coefficient is automatically adjusted to optimise the performance
• CPC Class Codes: G05B 23/0254 based on a quantitative model, e.g. mathematical relationships between inputs and outputs; functions: observer, Kalman filter, residual calculation, Neural Networks
• CPC Class Codes: G05B 23/027 Alarm generation, e.g. communication protocol; Forms of alarm
• CPC Class Codes: G05B 23/0289 Reconfiguration to prevent failure, e.g. usually as a reaction to incipient failure detection
• CPC Class Codes: G05B 23/0291 Switching into safety or degraded mode, e.g. protection and supervision after failure
• CPC Class Codes: H02J 3/001 Methods to deal with contingencies, e.g. abnormalities, faults or failures
• CPC Class Codes: H02J 3/004 Generation forecast, e.g. methods or systems for forecasting future energy generation
• CPC Class Codes: H02M 3/00 Conversion of dc power input into dc power output
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
• CPC Class Codes: Y04S 10/52 Outage or fault management, e.g. fault detection or location
• CPC Class Codes: Y10S 715/963 Calendar or scheduling

Abstract

An operation control system for a plurality of power generating plants and a method of maintaining and managing a plurality of power generating plants which supply power to arbitrary power systems. The operation control system includes a general supervision/diagnosis system which maintains and controls a plurality of power generating plants wherein the general supervision/diagnosis system selects from repairing periods and procedures required to repair failures which occur in the plurality of power generating plants according to levels of failures and performs maintenance and management of power generating plants which have failures. The system also includes means for maintaining a stable total power supply of the plurality of power generating plants.

Claims

1. An operation control system for a plurality of power generating plants comprising a general supervision/diagnosis system which maintains and controls a plurality of power generating plants, wherein said general supervision/diagnosis system diagnoses failures in said plurality of power generating plants and selects from repairing periods and procedures required to repair failures which occur in any of said plurality of power generating plants according to levels of failures and said general supervision/diagnosis system performs maintenance and management of any of said plurality of power generating plants which have failures;

and

means for maintaining a stable total power supply of said plurality of power generating plants.

2. A method of maintaining and managing a plurality of power generating plants which supply power to arbitrary power systems, comprising the steps of;

diagnosing and obtaining failure information of said plurality of power generating plants from an error supervision/diagnosis means to determine any of said plurality of power generating plants which have a failure,

determining a level of each said failure by a fault level judge, and

showing a predetermined repairing period and procedure for each said failure according to the determined fault level, and

maintaining a stable total power supply of said plurality of power generating plants.