Remote monitoring diagnostic system and method thereof

• US 6,999,903 B2
• Filed: 01/12/2005
• Issued: 02/14/2006
• 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 Engineering & Services Company Limited (Hitachi, Ltd.), Hitachi, Ltd.
• Inventors: Okabe, Akira, Ikeda, Hiraku, Yamaguchi, Zenji, Ichihashi, Akiyo
• Primary Examiner(s): WACHSMAN, HAL D
• Application Number:
  US11/033,318
• Publication Number:
  US 20050131656A1
• Time in Patent Office: 398 Days
• Field of Search: 702/188, 702/62, 702/122, 702113-115, 702179-181, 702182-187, 702/130, 702/132, 702/136, 702/138, 702/140, 700/286, 700/287, 700/290, 705/412, 340/870.01, 340/870.02, 340/870.16, 340/679, 340/3.1, 340/3.43, 340/3.44, 340/286.01, 376215-217, 379/100.08, 379/106.01, 379/106.03, 706/904, 706/906, 706/907, 706/912, 706/914, 706/915, 714/25, 714/26, 607/72, 607/73, 607/77, 607/79, 607/83, 602/81, 602/88, 60/390.91, 602/86, 602/78, 374/144, 415/118, 415/17, 415/1, 416/61
• US Class Current: 702/188
• CPC Class Codes: G05B 2219/24048 Remote test, monitoring, diagnostic
• CPC Class Codes: G05B 2219/24084 Remote and local monitoring, local result to remote, remote takes action
• CPC Class Codes: G05B 2223/06 Remote monitoring
• CPC Class Codes: G05B 23/0264 Control of logging system, e.g. decision on which data to store; time-stamping measurements
• CPC Class Codes: G05B 23/027 Alarm generation, e.g. communication protocol; Forms of alarm
• CPC Class Codes: Y02P 90/80 Management or planning

Abstract

The remote monitoring diagnostic system and method includes a data storage file used to collect the plant data representing the operation status of a plant and to store the plant data, a monitoring system to monitor the field plant according to the collected plant data, a database storing the past plant data associated with errors having occurred to the plant and actions taken to cope with the errors, a diagnostic system to analyze the plant data sent according to the database, and a reporting system to send a report to the user of the plant regarding the causes for the error and/or actions taken to cope with the error based on the result of the analysis. An error is judged in a combustor, when a difference in temperature of two exhaust gas temperature datum detected from adjacent combustors is larger than a predetermined value.

Claims

1. A remote monitoring diagnostic system comprising:

a monitoring means for collecting an exhaust gas temperature data of each of plural combustors installed on a gas turbine in a field power plant and for monitoring a combustion state of each of said combustors;

a data storage file for storing said exhaust gas temperature data of each of said combustors, said exhaust gas temperature data being collected by said monitoring means;

a database which accumulates data relating to error generation causes of past error generation of said combustor of said gas turbine and corresponding operations undertaken in response to said error generation causes of said past error generation;

diagnostic means for judging an error generation in said combustor, when a difference in temperature of two exhaust gas temperature datum detected from adjacent combustors is larger than a predetermined value, and for discriminating this error of a temperature detector, when an error is generated in one of said two exhaust gas temperature datum; and

a reporting means for sending an error generation cause of said combustor searched from said database and/or information regarding corresponding operations undertaken in response to said error generation cause, in accordance with a result of said judging by said diagnosis means, to a user of said field power plant.

2. A remote monitoring diagnostic method comprising the steps of:

collecting an exhaust gas temperature or each of plural combustors provided on a gas turbine by a monitoring means installed on a field power plant, and storing said exhaust gas temperature data for each of said combustors in a data storage file;

judging an error generation in said combustor, when a difference in temperature of two exhaust gas temperature datum detected from adjacent combustors is larger than a predetermined value, and judging an error of a temperature detector, when an error is generated in one of said two exhaust gas temperature datum, according to a diagnostic means; and

sending an error generation cause of said combustor and information regarding an operation previously undertaken for said error generation cause, which is searched from the data storage file, the data storage file storing data of past error generation causes of said cormbustor of said gas turbine and information regarding an operation undertaken in response to said error generation, according to a judged result of said diagnostic means, to a user of said power plant by a reporting means.