The relevance of energy storages for an autarky of electricity supply ...

2 Description of method of approach applied
The applied method for this Master Thesis can be described in five steps, as follows.
1. Criteria for assessment of storage technologies
At the beginning, several criteria are raised which are commonly used to assess
different storage technologies.
2. Description and assessment of storage technologies
In the second step, the storage technologies (Pumped Hydroelectric Storage,
Compressed Air Energy Storage, Hydrogen Storage) are compared, using criteria
raised (see chapter 4.2 Evaluation Criteria).
3. Comparison Demand Side/Supply Side
Demand side
In the third step, load curves for the constant and the Growth scenario for the
electricity demand in 2050 are calculated. For this calculation e-control data for
the year 2010 are used and allocated to 2050 values from the feasibility study
Energie Autarkie 2050. The result is annual, monthly, and daily data on
electricity demand for 2050 and corresponding load curves.
Supply Side
The feasibility study Energie Autarkie 2050 provides annual and monthly values
of the electricity mix for both scenarios, Constant and Growth. These values are
insufficient for comparison of demand and supply on a daily basis. Therefore,
daily data are based on average values, except the electricity for photovoltaic.
As electricity supply from photovoltaic varies between summer and winter as
well as during day and night, it is necessary to calculate the precise curves of
electricity production from this energy carrier as it has a high impact on the
storage demand during the course of a year and of a day. Due to the fact that no
detailed daily electricity supply curves for photovoltaic are provided by the
feasibility study, these values have to be calculated by the author within the
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