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BatterieSTABIL – Battery storage in multimodal operation for ancillary services and network stability

The goal of the project is to present how battery systems can contribute to system stability in addition to the contribution for covering the ancillary services in the electrical grid with high share of renewable power producers.

Ancillary services represent an essential part of a reliable, secure and stable electrical energy grid. Up to now ancillary services have been provided by fossil power plants, pumped storage hydro power plants and by adapted operation of certain grid utilities. Electrical storage technologies will play an important role in providing those ancillary services in the future, especially considering the capacity reduction of fossil power plants in the electrical energy supply portfolio. The ongoing revenues from providing ancillary services (e.g. providing frequency containment reserve) are not sufficient to reach the return of investment and cover the costs of the electrical storage system. Therefore the concurrent provision of several ancillary services i.e. the multimodal operation of batteries is considered by various stakeholders as a technical, in terms of the electrical grid, and economical reasonable concept in the energy supply chain. A multimodal operation means a battery operation that can be applied for the provision of several ancillary services, which can be activated in a combined way.

The following research project builds on the above presented aspects. The goal of the project is to demonstrate how the potential of battery storage technologies can be completely exploited by multimodal operation, where further ancillary services for system stabilization in addition to the already established ancillary services (primary energy control (Frequency Containment Reserve), voltage support and supply restoration process) can be provided in combination. Spinning reserve, dynamic-reactive power compensation and symmetrical behavior count to such further ancillary services for system stabilization.

Especially the interaction of certain control strategies for the realization of an operational strategy will be investigated to demonstrate universal future battery operations. This can solve challenges of the grid operation, caused by decentralized and renewable power production and the resulting displacement of conventional centralized power plants. Furthermore the possibility of a black start in an island grid operation, taking into account involvement of renewable power production, will be examined. The above-defined operational modes will be investigated theoretically in an offline simulation, which will be validated in laboratory and field tests afterwards. Eventually a practical realization of the defined operation strategies will be implemented in a continuous storage operation. Parallel to technological analyses an economical estimation of the implemented combined ancillary services provision will be executed. Based on these findings, the required regulatory framework will be extrapolated. Finally, scalable future solutions willbe deduced from previous investigations. The result of the project is to present how battery systems can contribute to system stability in addition to the contribution for covering the ancillary services in the electrical grid with high share of renewable power producers. The developed results should be technologically and economically feasible.

Partners of the consortium

Netz Niederösterreich GmbH (Project management)

Austrian Institute of Technology GmbH

Technische Universität Wien, Institute of Energy Systems and Electrical Drives)