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Experience of reliability of programmable control systems; Kokemuksia ohjelmoitavan automaation luotettavuudesta

Technical Report:

Abstract

The automatic control system reliability project studied operational experience of the use of programmable control systems at six conventional power plants. The emphasis in the project was on the analysis and classification of failures occurred, the failure analysis and recording practice used at the plants and on the maintenance of the control system. Moreover, the frequency of plug-in unit faults was evaluated. These failures are usually investigated and corrected under the supervision of plant management. The maintenance of programmable automatic control systems is primarily corrective, that is, faults are corrected when they occur. There are few points which need preventive maintenance. The maintenance of the programs and modifications require personnel specialized in this kind of work. The need for modifications varies very much depending on how well the application has been designed. The automatic control systems at the plants studied caused very few disturbances to production. The redundancy guarantees that failures in individual equipment do not cause interruptions in production. However, faults in the design of the application and in the installation have occurred also after the Commissioning in most plants. On the basis of the study, it can be assessed that the integration of a control system with investment  More>>
Authors:
Jaervinen, J; Mikkanen, M; [1]  Heimbuerger, H [2] 
  1. Ekono Oy, Espoo (Finland)
  2. Finnish Centre for Radiation and Nuclear Safety, Helsinki (Finland)
Publication Date:
Dec 31, 1993
Product Type:
Technical Report
Report Number:
STUK-YTO-TR-54
Reference Number:
SCA: 200104; PA: FI-95:003077; EDB-95:028124; SN: 95001320429
Resource Relation:
Other Information: PBD: 1993
Subject:
20 FOSSIL-FUELED POWER PLANTS; POWER PLANTS; COMPUTERIZED CONTROL SYSTEMS; RELIABILITY; AUTOMATION; AVAILABILITY; MAINTENANCE; 200104; COMPONENTS
OSTI ID:
10115086
Research Organizations:
Finnish Centre for Radiation and Nuclear Safety (STUK), Helsinki (Finland)
Country of Origin:
Finland
Language:
Finnish
Other Identifying Numbers:
Other: ON: DE95737615; ISBN 951-47-7772-7; TRN: FI9503077
Availability:
OSTI; NTIS
Submitting Site:
FI
Size:
34 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Jaervinen, J, Mikkanen, M, and Heimbuerger, H. Experience of reliability of programmable control systems; Kokemuksia ohjelmoitavan automaation luotettavuudesta. Finland: N. p., 1993. Web.
Jaervinen, J, Mikkanen, M, & Heimbuerger, H. Experience of reliability of programmable control systems; Kokemuksia ohjelmoitavan automaation luotettavuudesta. Finland.
Jaervinen, J, Mikkanen, M, and Heimbuerger, H. 1993. "Experience of reliability of programmable control systems; Kokemuksia ohjelmoitavan automaation luotettavuudesta." Finland.
@misc{etde_10115086,
title = {Experience of reliability of programmable control systems; Kokemuksia ohjelmoitavan automaation luotettavuudesta}
author = {Jaervinen, J, Mikkanen, M, and Heimbuerger, H}
abstractNote = {The automatic control system reliability project studied operational experience of the use of programmable control systems at six conventional power plants. The emphasis in the project was on the analysis and classification of failures occurred, the failure analysis and recording practice used at the plants and on the maintenance of the control system. Moreover, the frequency of plug-in unit faults was evaluated. These failures are usually investigated and corrected under the supervision of plant management. The maintenance of programmable automatic control systems is primarily corrective, that is, faults are corrected when they occur. There are few points which need preventive maintenance. The maintenance of the programs and modifications require personnel specialized in this kind of work. The need for modifications varies very much depending on how well the application has been designed. The automatic control systems at the plants studied caused very few disturbances to production. The redundancy guarantees that failures in individual equipment do not cause interruptions in production. However, faults in the design of the application and in the installation have occurred also after the Commissioning in most plants. On the basis of the study, it can be assessed that the integration of a control system with investment projects and design methods has a decisive role in achieving good results. Flexible and right-timed communication between process and automation designers and sufficient knowledge of processes are necessities for producing reliable systems}
place = {Finland}
year = {1993}
month = {Dec}
}