Abstract
Deployment of large volumes of hydrogen electrolysers is increasing in the electrical power grid and there is an emerging need to study their integration possibilities in the transmission networks. This paper studies the possibilities and impact of integration of hydrogen electrolysers in the Nordic Grid. Nordic 45 Grid model is simulated in an offline real time environment. Hydrogen electrolysers are modeled and interconnected in the transmission network to analyse the grid ability to withstand the integration. The simulation is conducted for the 2025 and 2030 load conditions, considering the expected hydrogen production from electrolysers by 2030. MATLAB and OPAL RT are used for the real time simulation of the Nordic 45 Grid model in the laboratory. Grid frequency stability and bus voltages are the key performance indicators considered. The implementation of a central frequency controller with sequential operation of multiple electrolysers in the network has also been examined.