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

• US 6,772,051 B2
• Filed: 07/09/2002
• Issued: 08/03/2004
• Est. Priority Date: 06/22/2000
• Status: Expired due to Term

• 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:
  US10/190,683
• Publication Number:
  US 20030000199A1
• Time in Patent Office: 756 Days
• Field of Search: 700/286, 700/287, 700/292-298, 702/57-62, 702/64, 702/65, 702/81, 702/82, 702/84
• US Class Current: 700/287
• 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

Quick recovery or recovery support of a faulty power generating facility by real time diagnosis such as facility failure diagnosis, supervision for failure symptoms, facility diagnosis by evaluation of performance using databases between said power generating facilities and an operation control system. The operation control system transfers information on operating status and secular characteristic changes of apparatus from power generating facilities or information from operators of selected power generating facilities. The level of a failure of a power generating facility which has a failure is evaluated and repairing information (e.g. recovery procedures, processes, required parts, inventory of the parts, possible failure causes, etc.) is automatically created from repairing information prepared in advance for each evaluation condition. The repairing information is then sent to the operation supporting section of the power generating facility.

Claims

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

comparing actual operation data of said power generating facilities by normal and abnormal operation data which was stored in a database in advance,

checking for any operation error by an error supervision/diagnosis means, and

outputting failure information from said error supervision/diagnosis means when finding an operation error,

determining the level of said failure by a fault level judge from said output failure information, and

showing a predetermined repairing period and procedure according to the determined fault level.

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

selecting a repairing period and procedure for a failure which occurred in at least one of said power generating facilities from repairing periods and procedures which are predetermined according to levels of failures and

controlling the operation of at least one of power generating facilities except the power generating facility which has the failure according to the selected repairing period and procedure.

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

selecting a repairing period and procedure for a failure which occurred in at least one of said power generating facilities from repairing periods and procedures which are predetermined according to levels of failures and

instructing to repair the power generating facility which has the failure according to the selected repairing period and procedure.

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

receiving failure information of a power generating facility which has a failure and checking whether the failure is a fatal fault which requires the power generating facility to stop,

determining the level of the non-fatal fault from said failure information when the failure is not a fatal fault,

selecting a period and a procedure to repair said failure from repairing periods and procedures which are predetermined according to levels of failures and

showing the selected repairing period and procedure.