The main purpose of this thesis has been to identify the general usage of the applications textit{inhibit} and textit{override} for a collection of installations operated by Statoil ASA. The applications are provided by a Safety and Automation System (SAS) that performs monitoring, control and safeguarding of the plant and its process. Logs that keep track of the SAS operator's actions and other facility-related events have been received from each installation, and regarded with respect to:* the general evolvement and trend of the application usage* instances of inhibits/overrides of long-term character* redundant signals that are inhibited/overridden simultaneously* critical time periods that exhibit high activity* tags that are frequently involved in the application usageThe results that were obtained for each above-mentioned point made it possible to give a stetement of how the installations are controlled through utilization of the safety-impairing, but useful applications.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:ntnu-13176 |
| Date | January 2011 |
| Creators | Johansen, Anders Freddy |
| Publisher | Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, Institutt for teknisk kybernetikk |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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