Power Plant Operation Control System and a Power Plant Maintaining and Managing Method

• US 20090138324A1
• Filed: 01/22/2009
• Published: 05/28/2009
• Est. Priority Date: 06/22/2000
• Status: Active Grant

• Current Assignee: mitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Hiraku Ikeda, Naoyuki Nagafuchi, Yasushi Iwai
• Inventors: IWAI, Yasushi, IKEDA, Hiraku, NAGAFUCHI, Naoyuki
• Granted Patent: US 8,412,384 B2
• Time in Patent Office: Days
• US Class Current: 705/9
• 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 diagnoses such as facility failure diagnosis, supervision for failure symptoms, facility diagnosis by evaluation of performance using databases between the 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 lever 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. An operation control system for controlling a plurality of power generating facilities, comprising

means for gradually weighting the levels of failures of said power generating facilities according to operating status information of each of said power generating facilities and

means for outputting preset information corresponding to each weighted failure level.

2. An operation control system for collectively controlling a plurality of power generating facilities which are dispersed remotely or for supporting to control said distributed power generating facilities, comprising

means for transferring information on operating status and secular characteristic changes of apparatus from said power generating facilities or information from operators of selected power generating facilities,

means for processing and diagnosing information transferred by said transferring means,

means for weighting the level of a failure of a power generating facility which has a failure according to the information sent from said processing and diagnosing means, and

means for selecting related repairing information from repairing information prepared for each of said failure weights and transmitting thereof to the related operation section and the operation supporting section of said power plant.

3. An operation control system in accordance with claim 2, further comprising means for transmitting said repairing information to a location which requires repairing or to a repairing personnel when said power generating facility has a failure to be repaired.

4. An operation control system for power generating facilities comprising a control facility which maintains and controls a plurality of power supplying facilities, wherein said control facility selects from repairing period periods and procedures required to repair failures which occur in said plurality of power supplying facilities and performs maintenance and management of power supplying facilities which have failures.

5. A method of maintaining and managing a plurality of power supplying 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 supplying facilities from repairing periods and procedures which are predetermined according to levels of failures and

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

6. A method of maintaining and managing a plurality of power supplying 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 supplying facilities from repairing periods and procedures which are predetermined according to levels of failures and

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

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

selecting some possible causes for a failure which occurred in at least one of said power supplying facilities in the order of highest possibility to lowest possibility and information of a phenomenon which may extend or propagate if the failure is left unpaired, and

presenting the selected item information.

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

receiving information of a failure which occurred in at least one of said power supplying facilities through communication means,

selecting a repairing period and procedure for a failure in the received information from repairing periods and procedures which are predetermined according to levels of failures and

outputting an instruction to control the operation of at least one of power supplying facilities except the power supplying facility which has the failure according to the selected repairing period and procedure.

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

receiving failure information of a power supplying facility which has a failure and checking whether the failure is a fatal fault which requires the power supplying 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.

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

obtaining failure information of a power supplying facility which has a failure from an error supervision/diagnosis means,

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

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

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

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

checking for any operation error,

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.

12. An operation and management system for power generating facilities which maintains and manages a plurality of power supplying facilities which supply power to arbitrary power systems, comprising

a database storing operation data obtained while the facilities are in normal operating states and operation data obtained while the facilities are in abnormal states,

an error supervision/diagnosis means which compares actual operation data of said power supplying facilities by operation data stored in said database, checks for any operation error,

and outputs failure information when finding an operation error,

a fault level judge which determines the level of said failure from said output failure information, and

an operation scheduling means which shows a predetermined repairing period and procedure selected according to the determined failure level.