Coupling of electricity and gas market models

In the course of the German energy transition, the energy system is facing major transformations. In order to analyze and understand structural changes, system modeling is an appropriate approach to create an image of reality. Various models of the electricity and the gas market allow for an independent analysis of both systems. Due to the increasing importance of sector coupling technologies, a separate analysis of the two markets may no longer be sufficient. This paper deals with the difficulty of connecting electricity market models to gas market models while keeping the complexity of the resulting optimization problem low. Coupling points of the two models are identified and analyzed. Furthermore, in the methodology part, an iterative link between the two models is developed. In exemplary studies, the interaction between the two models is investigated for a lignite exit scenario in Germany.