Locating Large Gas Leaks in Pressurized Subscriber Cable Networks by Using an Electrical Network Analysis Technique

Kazutoki TAKEDA  

IEICE TRANSACTIONS on Communications   Vol.E78-B    No.10    pp.1410-1415
Publication Date: 1995/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: >Communication Cable and Wave Guide
communication networks,  gas leak,  location,  pressurized cable,  subscriber,  

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A method is proposed for locating large gas leaks in subscriber cable networks composed of different type cables and/or branch cables that uses pressures periodically measured at several points. Theoretical pressure curves corresponding to these measured pressure curves are calculated using a model representing the actual cable network. These curves are called the calculated pressure curves. The position of the leak is varied in the calculation model and where the measured and calculated pressure curves coincide the most, the leak position in the calculation model indicates the estimated leak position. The calculated pressure curves are based on the Laplace transform and an analogy between the pneumatic characteristics in cable networks and the electrical characteristics in electrical transmission networks. An experiment using a cable network about 910m long resulted in a location error of less than 30m.