This thesis investigates the impacts of integrating
large-scale electrolysers in the Danish
energy system and transmission grid in 2030.
A partial-equilibrium energy system model
is applied to assess how the energy system
should be composed, with regard to capacities
of production, consumption and storage
units. Subsequently, a DC load flow analysis
is conducted to investigate how large-scale
electrolysers impact loading of the transmission
grid, based on electrolyser capacity, location
and energy system composition.
The theories regarding synoptic planning
and the adequate level of detail are applied
throughout the thesis.
In the thesis it was found that large electrolyser
capacities can facilitate increased integration
of fluctuation renewable production
units, and increase utilisation of these units.
Furthermore, it was demonstrated that electrolysers
can reduce the need for other flexible
consumption units, such as electric boilers.
From a transmission grid perspective it was
evident that large electrolyser capacities can
be integrated without overloading the grid,
if electrolysers are placed in feed-in zones for
offshore wind power plants, and are operated
proportionally to the production of the wind
power plants. If these criteria are met, larger
electrolyser capacities can even reduce grid
loading, as compared to lower electrolyser capacities.