Techno-economic comparison of grid reinforcement and battery
To illustrate this methodology, the grid and meter data of the Danish urban distribution system operator NKE-Elnet are used, and the rollout of distributed energy resources (DERs) as well
Elsystemansvar A/S (subsidiary of Energinet) has asked Ea Energy Analyses to analyse the benefits and main drivers for the installation of storage units in the Danish power system. This will supplement the technology aspects in the recent Technology Catalogue on Energy Storage (DEA and Energinet, 2019).
After going over the main features of the Danish electricity markets – with a focus on the provision of ancillary services – opportunities for value-stacking (utilizing opportunities across markets) are identified and examined for the year 2025 at the transmission grid level.
The market most suited for electricity storage is FCR (primary reserve), while other markets such as aFRR (secondary reserve) and day ahead spot markets may contribute to the in-come of a storage unit. In practice, we find that the opportunities for value-stacking in a Nordic/Danish context are limited due mainly to the following
High-Temperature Thermal Energy Storage (HT-TES) provides an option for long-term storage (Ea Energy Analyses, 2019). As of 2019, HT-TES has not reached commercialisation, but several companies and research projects are focusing on improving the technical efficiency and the economics3. Two
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