Alkaline electrolyzer and V2G system DIgSILENT models for demand response analysis in future distribution networks

Grid instabilities originated by unsteady generation, characteristic consequence of some renewable energy resources such as wind and solar power, claims for new power balance solutions in largely penetrated systems. Denmark´s solid investment in these energy sources has awaked a need of rethinking about the future control and operation of the power system. A widespread idea to face these challenges is to have a flexible demand easily adjustable to the system variations. Electrothermal loads, electric vehicles and hydrogen generation are among the most mentioned technologies capable to respond, under certain strategies, to these variations. This paper presents two DIgSILENT PowerFactory models: an alkaline electrolyzer and a vehicle to the grid system. The models were performed using DIgSILENT Simulation Language, aiming to be used for long-term distribution systems simulations. Two voltage levels were considered: 20 kV for the electrolyzer grid connection and 0.4 kV for the plug-in electric vehicle. Simulation results illustrate the simplicity and manageability of the presented models.