SIMONE Research Group
Solutions For Simulation And Optimisation In The Gas Industry



Dynamic and Steady-State Simulation

Dynamic Simulation

The basic dynamic simulation module can perform simulation runs for solving all commonly arising control tasks. It manages all networks including non-pipe elements:

  • On/Off valves
  • Controlled valves - pressure reducers, flow limiters, throttle valves, check valves
  • Resistor elements
  • Gas reservoirs
  • Basic models of compressor stations ("free mode" and "generic")

If needed, several extension modules can be integrated into the simulation system to meet the user's requirements.

Steady-State Simulation

A special software module, offering a swift convergency to the solution, has been developed for a steady-state calculation. The steady-state simulation module retains the functionality of the dynamic module with several modifications regarding the nature of steady-state calculation.

Compressor Stations

Simplified Modelling

The simplified compressor station modelling is intended mainly for a use in network structure designing and marketing studies. Two levels of simplified compressor station modelling are provided:

  • Free mode - this simplest way of modelling treats the compressor station as an "omnipotent" unit, without almost any constraint.
  • Generic compressor - its behaviour is described by a set of the operating field border curves (minimum and maximum flow, maximum power, fixed efficiency).

Device Oriented Compressor Station Model

This universal and detailed modelling performs the service of both analytical studies on a real network as well as a use with on-line information and control systems, inducting a remarkable increase of the simulation accuracy.

The compressor station consists of turbocompressors, reciprocating compressors, gas turbine drives, electro drives, gas-powered drives and gas coolers, in any number and any configuration. A compressor station can be modelled by in any stage-based serial/parallel configuration of the compressor units.

SIMONE - Compressor Stations

Compressor Station Feasibility Test

System for automatic check of the feasibility of a compressor station and control law was developed to assist the universal device oriented modelling.

Heat Dynamics

If a high accuracy of temperature distribution is required (as in underwater pipelines with extreme pressure drop or in simulation of flow downstream from compressor stations), the heat dynamics option is to be applied.

Heat dynamics model takes into account two following components:

  • Heat transients in the flowing gas resulting from the Joule-Thompson effect.
  • Heat transients resulting from the heat exchange between the flowing gas and the enveloping tube with its further environment. The model also covers the heat capacity of the surroundings.

A precise description of gas coolers and heaters is included too.

Gas Quality Tracking

For the networks supplied by gas from several sources with a different quality, SIMONE offers a unique approach to gas composition tracking, which enables to simulate the transmission and merging of gas flows with different quality across the pipeline system.

The quality-tracking module has been designed to meet very high accuracy requirements, which makes it suitable for use in simulation-based energy billing.

Blending Stations

Two kinds of blending station for controlled gas mixing are currently defined in SIMONE; other kinds can easily be included on request.