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US 6,665,635 B2Granted
Method for providing power plant maintenance services
AssigneeHitachi, Ltd.
InventorsSatoru Shimizu, Tooru Kimura, Yoshio Maruyama
Life of this patent
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AssigneeHitachi, Ltd.
InventorsSatoru Shimizu, Tooru Kimura, Yoshio Maruyama
Estimating the term…
An objective is to quickly provide appropriate maintenance services at low costs during routine inspection procedures and/or upon occurrence of abnormal events at thermal power plants or stations. In a thermal power plant maintenance system comprising a control device 1 for control of operation conditions and process amounts of plant equipment and a maintenance tool 2 operatively linked to the control device 1 via a network 7 for performing maintenance of a controlling controller 11 as built in the control device 1, the system further comprises a remote maintenance device 3 that executes similar functions to those offered by the maintenance tool 2 for bidirectionally transferring plant data along with data concerning the controlling controller 11's status via a communications line 8 between the maintenance tool 2 and the remote maintenance device 3 to thereby provide maintenance services of the thermal power plant of interest.
A thermal power plant maintenance service provision method for use with a thermal power plant maintenance system comprising a control device for control of an operation state and process amount of plant equipment and a maintenance tool operatively coupled via a network to said control device for performing maintenance of a controlling controller as built in said control device, characterized in that the system further comprises a remote maintenance device for executing a similar function to that of said maintenance tool, and that the method provides a thermal power plant maintenance service for permitting bidirectional transmission of plant data and data concerning a state of said controlling controller via said communication line between said maintenance tool and said remote maintenance device, and a maintenance service providing person directly modifies more than one control parameter and control circuitry within said controlling controller via said communication line and said maintenance tool and said network.
Dependencies are inferred from the claim text.