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

• US 7,496,429 B2
• Filed: 11/13/2006
• Issued: 02/24/2009
• 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: Iwai, Yasushi, Ikeda, Hiraku, Nagafuchi, Naoyuki
• Primary Examiner(s): Shechtman; Sean P
• Application Number:
  US11/595,881
• Publication Number:
  US 20070106427A1
• Time in Patent Office: 834 Days
• Field of Search: 700/9, 700 14- 17, 700/19, 700/21, 700/22, 700/49, 700/83, 700/286, 700/287, 700292-298, 702 60- 62, 702182-185, 715/963, 715/965, 715/953
• US Class Current: 700/292
• 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 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.) 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:

receiving information of a failure which has occurred in a gas turbine of one of said power generating facilities, through a communication means, according to operation information of said power generating facilities,

selecting a repairing period and procedure of said gas turbine for said failure, from repairing periods and procedures which are predetermined according to levels of failures, and

outputting an instruction, through said communication means, to control an operation of at least one of said power generating facilities other than said power generating facility in which said gas turbine failure has occurred, according to said selected repairing period and procedure for a level of failure of said gas turbine.

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

a database for storing an operation data obtained while a gas turbine of one of said power generating facilities is in a normal operating state, means for checking for any operation error of said gas turbine, and means for outputting failure information when finding an operation error of said gas turbine,

a fault level judgment means which determines a level of failure from said outputted failure information of said gas turbine, and

an operation scheduling means which shows a predetermined repairing period and procedure selected according to said determined failure level of said gas turbine.

3. An operation and management system for power generating facilities which manages a plurality of power generating facilities by a remote monitoring, comprising:

an abnormal element database which manages abnormal occurrence information and causes which correspond to said abnormal occurrence information,

a level judgment means which performs a weighting step of an abnormal degree of each of said power generating facilities according to a respective operation state information of said power generating facilities,

means for determining whether said weighted abnormal decree makes it unnecessary to immediately stop the operating of said power generating facilities,

in a case of a fatal failure when said weighted abnormal degree makes it necessary to immediately stop an operation of said power generating facilities, a means for stopping said operation due to an abnormal cause according to said abnormal element database, and

in a case of a non-fatal failure when said weighted abnormal degree makes it unnecessary to immediately stop the operation of said power generating facilities, a means for executing a control operation end command signal using a control model in which an actual logic of a control device for controlling said power generating facilities is reflected, according to an operation command signal from said control device, and means for executing a process state amount, using a physical model according to said control operation end command signal, and means for determining whether a difference between said execution process state amount and an actual operation process measurement exceeds a present limit, and means for adjusting a control operation end adjustment use control set limit of said control device and a parameter of said control model with a same signal, to eliminate a difference between said execution process state amount and an actual operation process measurement information, when said difference exceeds a preset limit.

4. An electric power facility operation remote supporting system for remotely supporting operation of an electric power generating facility, comprising:

a judging means for judging an abnormality or a sign of abnormality of said electric power generating facility based on at least one of information on an operating state of said electric power generating facility, and information on a time-varying characteristic of components of said electric power generating facility;

a database for storing abnormality corrective-action data corresponding to data of a plurality of abnormalities or signs of abnormality in regard to said electric power generating facility;

a determining means for determining whether recovery of the operating state by adjusting operation control setting values of said electric power facility is possible; and

an adjusting means for tuning operating variables for operation control of said electric power facility in a case where the recovery of the operating state by adjusting operation control setting values is possible when an abnormality or a sign of abnormality occurs,

wherein said determining means and said adjusting means serve as a setting means for setting said abnormality corrective-action data corresponding to said data of a plurality of abnormalities or signs of abnormality.

5. An electric power facility operation remote supporting system according to claim 4, further including:

a transmitting means for transmitting, as a result that the abnormality or the sign of abnormality is judged with receipt of said information on said operation control operating variables tuned by said adjusting means, information of at least one of a recommended operating method or an influence resulting when the abnormality or the sign of abnormality is left as is; and

a presenting means for presenting the information transmitted by said transmitting means to a customer.

6. An electric power facility operation remote supporting system for remotely supporting operation of an electric power generating facility, comprising:

a judging means for judging an abnormality or a sign of abnormality of said electric power generating facility based on at least one of information on an operating state of said electric power generating facility and information on time-varying characteristic of components of said electric power generating facility;

a database for storing abnormality corrective-action data corresponding to data of a plurality of abnormalities or signs of abnormality in regard to said electric power generating facility;

a determining means for determining whether recovery of the operating state by adjusting operation control set values of said electric power facility is possible;

a transmitting means for transmitting, as a result that an abnormality or a sign of abnormality is judged, information of at least one of a recommended operating method or an influence resulting when the abnormality or the sign of abnormality is left as is in a case where the recovery of the operating state by adjusting operation control set values is not possible when an abnormality or a sign of abnormality occurs; and

a presenting means for presenting the information transmitted by said transmitting means to a customer,

wherein the determining means and the adjusting means serve as setting means for setting said abnormality corrective-action data corresponding to said data of a plurality of abnormalities or signs of abnormality.

7. An electric power facility operation remote supporting method for remotely supporting operation of an electric power generating facility, the method comprising the steps of:

judging an abnormality or a sign of abnormality of said electric power generating facility based on at least one of information on an operating state of said electric power generating facility and information on a time-varying characteristic of components of said electric power generating facility;

determining whether recovery of the operating state by adjusting operation control set values of said electric power facility is possible when an abnormality or a sign of abnormality occurs in said electric power generating facility; and

tuning operating variables for operation control of said electric power facility in a case where the recovery of the operating state by adjusting operation control set values is possible.

8. An electric power facility operation remote supporting method according to claim 7, further comprising steps of:

receiving said information on the operation control operating variables tuned in said tuning step;

transmitting information, on a judgment result of an abnormality or a sign of abnormality, of at least one of a recommended operating method or an influence occurred when the abnormality or the sign of abnormality is left as is; and

presenting the information transmitted in said transmitting step to a customer.

9. An electric power facility operation remote supporting method for remotely supporting operation of an electric power generating facility, the method comprising the steps of:

judging an abnormality or a sign of abnormality of said electric power generating facility based on at least one of information on an operating state of said electric power generating facility and information on time-varying characteristic of components of said electric power generating facility;

determining whether recovery of the operating state by adjusting operation control setting values of said electric power facility is possible when an abnormality or a sign of abnormality occurs in said electric power generating facility;

transmitting, as a result of judging an abnormality or a sign of abnormality when the recovery of the operating state by the operation control setting values is not possible, information of at least one of a recommended operating method or an influence resulting when the abnormality or the sign of abnormality is left as is; and

presenting the information transmitted in said transmitting step to a customer.