Pipeline capacity determination has traditionally been carried out by applying steady state optimization techniques. However, steady state techniques are not well suited to handle situations in which the pipeline contains high flow variations or where linepack transportation / manipulation is essential to optimum throughput results. We present an implementation of a transient optimization approach to determining pipeline capacity in CenterPoint's natural gas transmission pipeline.

The approach uses an optimization-based state finding technology to find the current state of the pipeline using a few hours of telemetered data, coupled with gas transient optimization to maximize the throughput of the pipeline.

The current implementation of the gas transient optimizer makes use of the isothermal assumption and a single gas composition throughout the pipeline. These issues will be addressed in future implementation updates.

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