Study character & client: Short study on behalf of the Scientific Advisory & Project Board (SAPB) of 50Hertz

Project duration:September 2025 - December 2025

Context:

Historically, grid operators have been able to rely on largely stable feed-in and load profiles. However, with the growing share of variable renewable energies and, in particular, the increasing use of battery storage systems, volatility in the electricity system has increased significantly. Battery storage systems react flexibly to price and market signals and adapt their schedules at short notice in both the day-ahead and intraday markets. In a future system with high battery storage penetration, these dynamic schedule changes could pose a significant challenge for grid planning and secure grid operation.

Objective:

The aim of the study is therefore to analyse possible forecasting errors in battery use. The study looks in detail at the behaviour of battery storage in the day-ahead and intraday market. The BTU's focus is on the question: "To what extent is it possible for batteries to change their schedules at short notice and thus make new planning necessary, e.g. for grid congestion management in the transmission grid".

Results:

Link to the study: https://www.50hertz.com/xspProxy/api/staticfiles/50hertz-client/dokumente/unternehmen/partnerschaften/sapb_optimierung%20batterien_251202_final%20f%C3%BCr%20webseite.pdf

Partner:

Steinbeis Research Centre for Electrical Grids and Energy Storage Systems (ENES),

50Hertz Transmission GmbH