More and more, the on-line (or real-time) pipeline software market is being driven by the need for model based leak detection systems. Unfortunately, the instrumentation requirements of such leak detection systems are not easily determined by pipeline operating companies. Consequently, the design of pipeline instrumentation seldom takes leak detection into account. In particular, intuition leads one to believe that the more pressure instrumentation that is installed on a pipeline, the more sensitive leak detection will become. This article will show that in some cases intuition can be a poor guide. In a recent modeling study, leak sensitivity improvements from additional pressure measurements installed on a natural gas pipeline were analyzed. Several cases were considered where key parameters affecting the sensitivity of the leak detection software were varied. The resulting minimum detectable leak sizes, times required to detect the leak, and the leak locating and sizing accuracies were determined. The results of these cases and some general guidelines for pipeline instrumentation are presented.
Effect of measurement placement on gas pipeline leak detection
Einfluss der Messstelle auf die Lecksuche in Gasfernleitungen
1989
17 Seiten, 16 Bilder, 4 Tabellen, 4 Quellen
Conference paper
English
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