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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Gerenciamento de alarmes em plataformas mar?timas de produ??o de hidrocarbonetos: metodologia e estudo de caso

Almeida, Andre Lucena de 21 December 2010 (has links)
Made available in DSpace on 2014-12-17T14:08:44Z (GMT). No. of bitstreams: 1 AndreLA_DISSERT.pdf: 1426214 bytes, checksum: 62fdf46525d28318b6138490219276ba (MD5) Previous issue date: 2010-12-21 / In the operational context of industrial processes, alarm, by definition, is a warning to the operator that an action with limited time to run is required, while the event is a change of state information, which does not require action by the operator, therefore should not be advertised, and only stored for analysis of maintenance, incidents and used for signaling / monitoring (EEMUA, 2007). However, alarms and events are often confused and improperly configured similarly by developers of automation systems. This practice results in a high amount of pseudo-alarms during the operation of industrial processes. The high number of alarms is a major obstacle to improving operational efficiency, making it difficult to identify problems and increasing the time to respond to abnormalities. The main consequences of this scenario are the increased risk to personal safety, facilities, environment deterioration and loss of production. The aim of this paper is to present a philosophy for setting up a system of supervision and control, developed with the aim of reducing the amount of pseudo-alarms and increase reliability of the information that the system provides. A real case study was conducted in the automation system of the offshore production of hydrocarbons from Petrobras in Rio Grande do Norte, in order to validate the application of this new methodology. The work followed the premises of the tool presented in ISA SP18.2. 2009, called "life cycle alarm . After the implementation of methodology there was a significant reduction in the number of alarms / No contexto de opera??o de processos industriais, alarme, por defini??o, ? um aviso ao T?cnico de Opera??o que uma a??o com tempo restrito para ser executada ? necess?ria, enquanto que evento ? uma informa??o de mudan?a de estado e n?o demanda a??o por parte do T?cnico de Opera??o, consequentemente n?o deve ser anunciada, sendo apenas armazenada para fins de an?lise de manuten??o, incidentes e utilizadas para sinaliza??o/monitora??o (EEMUA, 2007). Por?m, alarmes e eventos s?o frequentemente confundidos e configurados inadequadamente de forma semelhante por programadores de sistemas de automa??o. Esta pr?tica resulta em uma elevada quantidade de pseudo-alarmes durante a opera??o de processos industriais. O elevado n?mero de alarmes configurados ? um dos principais entraves para a melhoria da efici?ncia operacional, dificultando a identifica??o de problemas e aumentando o tempo de resposta ?s anormalidades. As principais conseq??ncias desse quadro s?o o aumento do risco ? seguran?a das pessoas, instala??es, meio ambiente e o agravamento das perdas de produ??o. O objetivo principal deste trabalho ? apresentar uma filosofia de configura??o de um sistema de supervis?o e controle, desenvolvida com o intuito de diminuir a quantidade de pseudo-alarmes configurados e aumentar a confiabilidade das informa??es que o sistema fornece. Um estudo de caso foi realizado no sistema de automa??o das plataformas mar?timas de produ??o de Hidrocarbonetos da Petrobras no Rio Grande do Norte, de forma a validar a aplica??o dessa nova metodologia. O trabalho seguiu as premissas da ferramenta apresentada na norma ISA SP18.2. 2009, denominado ciclo de vida de alarme . Ap?s a implanta??o da metodologia verificou-se uma redu??o significativa no n?mero de alarmes

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