Modelling Gas Networks with Compressors: A port-Hamiltonian Approach

TL;DR

This paper develops an energy-based port-Hamiltonian modeling framework for gas networks, incorporating four compressor models to improve transient simulation accuracy and integration.

Contribution

It introduces a novel port-Hamiltonian approach to model compressors within gas networks, enabling detailed and energy-consistent simulations.

Findings

Validated the models with numerical simulations

Compared four different compressor models

Demonstrated the framework's effectiveness in network simulations

Abstract

Transient gas network simulations can significantly assist in design and operational aspects of gas networks. Models used in these simulations require a detailed framework integrating various models of the network constituents - pipes and compressor stations among others. In this context, the port-Hamiltonian modelling framework provides an energy-based modelling approach with a port-based coupling mechanism. This study investigates developing compressor models in an integrated isothermal port-Hamiltonian model for gas networks. Four different models of compressors are considered and their inclusion in a larger network model is detailed. A numerical implementation for a simple testcase is provided to confirm the validity of the proposed model and to highlight their differences.