Scientific Errors of the Gas Model of “Multi-Time Period Combined Gas and Electricity Network Optimisation”, Doi: 10.1016/J.Epsr.2007.11.002

Abstract

This paper addresses the scientific errors of the gas model developed by Chaudry et al. on Electric Power Systems Research 78 (2008) 1265–1279. The proposed gas network model of the original paper does not obey the mass and momentum equations for the (successive) steady-state conditions. To illustrate the technical flaws of the gas model, a gas pipe with a time-varying demand profile and a fixed inlet pressure was used to find the outlet pressure, gas intake, change of linepack, and flow imbalance by three methods: 1) the proposed model of Chaudry et al. for successive steady-state conditions (Method 1), 2) PipelineStudio successive steady-state (Method 2), and 3) PipelineStudio unsteady-state (Method 3). There are large deviations between the results obtained from the original paper (Method 1) and the ones from the PipelineStudio gas simulator (Method 2 and 3).