This tutorial shows the operational and structural optimization of a seasonal fuel storage. The effects of the optimization can be evaluated using the Key Figure Self-Sufficiency Rate. The economic values, particularly those of low-cost cavern storage, were chosen to support the function of the tutorial.
Reference Case
In the Reference Case, an industrial site covers its Electricity Demand partially by its Photovoltaic park of 1.2 MWpeak and its Heat Demand by a gas fired Hot Water Boiler.
Variants 1 and 1b With Year-Round Coupled Constraint
In the variants 1 and 1b, hydrogen is produced with a Power-to-Gas unit and saisonally stored. The saisonal storage is a year-round coupled constraint. Therefore, the two-stage optimization algorithm is used.
Variant 1 With Power-to-Gas, Gas Storage, and Fuel Cell
In addition to the components in the Reference Case, Variant 1 includes a combination of Power-to-Gas, cavern storage, and a Fuel Cell. The power-to-gas plant uses surplus photovoltaic electricity to produce hydrogen, which is stored seasonally in the Fuel Storage facility (see following figure).
The electric daily storage system further improves the utilization of power-to-gas capacity.
Variant 1b
Variant 1b is based on Variant 1. It additionally optimizes the size of the Fuel Storage by means of structural optimization.
