Assessment of curtailed wind energy potential for off-grid applications through mobile battery storage

• The increasing share of variable renewable energy in the grid has led to issues related to curtailment. In Germany, in 2015 more than 4000 GWh of wind energy was curtailed. The off-grid energy requirements for construction and event industry rely heavily on fossil fuel based generators. In this paper, a use case for the mobile battery storage converting curtailed wind energy into an asset is investigated. Mobile batteries are considered to utilize the curtailed wind energy for the off-grid applications like festivals and concerts in Germany. A wind farm with total curtailed energy of 134 GWh and total curtailment duration of about 32% of the time in 2017 is identified. The technical model is constructed in SIMULINK to simulate the charging of battery from curtailed wind energy. The levelized cost of storage was found to be in the range of 0.150–0.249 $/kWh. A comparison of the proposed energy storage with the existing diesel generator is performed to evaluate the benefits of the analysis. It is found that the proposed use case has less environmental impact and entails comparable levelized cost with diesel generators. The policy suggestions and implications of the proposed model are discussed in the paper.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Naturresursteknik -- Energisystem (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Environmental Engineering -- Energy Systems (hsv//eng)

Nyckelord

Energy storage

Germany

Off-grid applications

Techno-economic optimization

Wind curtailment

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