Modelling an electrolyser in a graph-based framework

TL;DR

This paper introduces a graph-based steady-state model for electrolysers in multi-carrier energy networks, addressing boundary conditions for well-posedness and validating these conditions numerically.

Contribution

It presents a novel electrolyser model capable of producing hydrogen and heat, with derived boundary conditions ensuring well-posed load flow analysis.

Findings

Boundary conditions for well-posedness are identified.

Numerical validation confirms the derived conditions.

Model supports steady-state analysis of multi-carrier networks.

Abstract

We propose an electrolyser model for steady-state load flow analysis of multi-carrier energy networks, where the electrolyser is capable of producing hydrogen gas and heat. We show that there are boundary conditions that lead to a well-posed problem. We derive these conditions for two cases, namely with a fixed and non-fixed ratio between gas and heat output. Furthermore, the derived conditions are validated numerically.