AN OPERATION SUPPORT SYSTEM OF LARGE CITY GAS NETWORKS BASED ON FLUIDTRANSIENT MODEL

This paper describes the essential features and experience of applying a fluid transient model to the operation support system of large city gas pipeline networks. The system, operating in the second largest ci ty, Osaka, in Japan since 1992, includes the functions of a real-time leak detection and localization a fast predictive computation of the p ressure and flow distributions in networks, and an interactive trainin g simulator using a transient model connected with SCADA training syst em. To achieve fast forecasting calculation in real-time manner, the c ombined method of a fully implicit transient calculation for high pres sure transmission networks and a steady-state calculation for middle p ressure distribution networks is developed. The actual performance of real-time leak detection and the accuracy of the forecasting model are discussed.