SAInt: Software solution to model coupled energy systems

time & cost saving solution

invest in just one software solution to plan & model coupled energy systems 

seamless data exchange

avoid time consuming and error prone data exchanges between different software environments 

fast, robust & accurate solver 

use our state of the art solvers to tackle your energy systems modelling challenges

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automate your model and scenario setup and connect our API to your external applications

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The gas network simulation models in SAInt are based on the one-dimensional continuity, momentum, energy, and state equations, derived from the laws of conservation of mass, momentum energy and the real gas law.

The gas compressibility is taken into account through an equation for the compressibility factor. The available equations for computing the gas compressibility include Papay, AGA, AGA8DC92, GERG2008 as well as additional custom equations. Furthermore, the gas model contains a number of options for computing the friction factor in the pressure drop equation such as Hofer, Zanke, Nikuradze and Colebrook-White equation.

In addition, gas networks can be simulated with gas quality, composition & temperature tracking.

The simulation models for electricity networks are based on steady state alternating currents (AC). Electric lines and transformers are modeled by a unified pi-circuit model, while generation units and loads are modeled at buses. Time transitional constraints of generation units, such as start-up and shut down times as well as maximum ramp rates are considered.

The combined simulation of gas and electricity networks is one of the unique model features of SAInt.

In a combined simulation, the equations describing the gas and electricity system are linked through a number of coupling equations reflecting the physical interlink between the two energy vectors at gas fired power plants, power-to-gas facilities, electric driven gas compressor stations and LNG terminals. The resulting system of equations are solved simultaneously for each simulation time step.

One of the most powerful features of the combined simulation model is its ability to define conditional control changes, which may include state information of both energy vectors.

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Frequently Asked Questions

SAInt can be used to answer the following types of questions:

  • What are the impacts of gas network constraints on power system operations?
  • What is the value of coordinating electricity and gas network operations?
  • What are the impacts of Power-To-Gas facilities on electricity and gas network operations?
  • What are the impacts of an extreme weather event or of a gas network (or electricity network) contingency on the reliable operation of both critical energy infrastructures?
  • What are the impacts of new federal or state policies on the operation of both systems?

SAInt allows the user to model different energy systems in a single integrated simulation environment and graphical user interface.

The combined modeling of natural gas and electricity networks is the most unique feature of SAInt.

The equations describing the natural gas and electricity systems are linked through a number of coupling equations reflecting the physical interlink between the two energy vectors. The resulting system of equations are solved simultaneously for each time step.

The coupling between both vectors includes:

  • the gas offtake from gas networks to generate electricity in gas fired power plants connected to electricity networks,
  • the power offtake from electric networks to generate hydrogen and/or synthetic natural gas in power to gas facilities and the injection of the generated gas into gas pipeline networks as well as the blending and tracking of changes in gas composition and gas qualities downstream.
  • the power offtake from electric networks to operate electric driven gas compressor stations and underground gas storage facilities
  • the power offtake from electric networks to operate storage tanks and low and high pressure pumps in LNG regasification terminals.

The current version of SAInt models real large-scale natural gas and electricity networks, independently or in a coupled way.

It includes two gas network modeling approaches:

  • Steady State Gas Network Simulation with Gas Quality, Composition and Temperature Tracking
  • Transient Gas Network Simulation with Gas Quality, Composition and Temperature Tracking 

and two electric network modeling approaches:

  • AC Power Flow Network Simulation and
  • AC Optimal Power Flow Network Simulation.

The gas and electricity network models can be combined to run the following simulation models:

  • Coupled Steady Gas and Steady AC-Power Flow Simulation,
  • Coupled Steady Gas and Steady AC-Optimal Power Flow Simulation,
  • Coupled Dynamic Gas and Quasi-Dynamic AC-Power Flow Simulation, and
  • Coupled Dynamic Gas and Quasi-Dynamic AC-Optimal Power Flow Simulation.

Office Germany:
encoord GmbH
Am Waldthausenpark 9
45127 Essen
Germany

Telephone:
(+49) 201 433 950 39

Email:
info@encoord.com

Managing Director:
Dr. Kwabena Pambour

Office USA:
encoord, LLC
Greater Denver Area
Edgewater, CO 80214
United States

Telephone:
(+1) 720 418 1843

Email:
info@encoord.com

Managing Director:
Dr. Carlo Brancucci

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