# Evaluating the Flexibility Benefits of Smart Grid Innovations in Transmission Networks
## 4 Conclusions  
The current paper dealt with the study of the installation of a BESS to the Cypriot power system that operates along with the already existing conventional generators, in order to examine its impact to the enhancement of the system's flexibility. The presented work is included to the FLEXITRANSTORE H2020 project, where an advanced flexibility adequacy assessment platform has been processed, in an effort to review the flexibility indices of the electrical systems except form the generation adequacy indices. Indeed, in FLEXITRANSTORE project, an evaluation approach for the costs and benefits of integrating innovation technology into the electricity network for improving flexibility has been presented. A CBA framework has been developed, according to ENTSO-E CBA framework [21], leveraging several characteristics of methodologies put forward by international organizations (i.e., ENTSOe, US DoE), identifying specific KPIs and mechanisms. Note that the parameters considered for the evaluative analysis are similar with the adequacy studies. Related what-if studies have been conducted for the integration of batteries in the Cypriot system, studying the impact on flexibility indices like IRRE. The obtained results indicate that BESS ensures the upgrade of the flexibility of the Cypriot electric system, as the IRRE metric reveals, rendering the BESS as a reliable alternative instead of conventional generators.  
Conceptualization, V.V. and I.Z.; methodology, C.C. and I.G.; formal analysis, I.Z.; investigation, V.V.; resources, V.V. and M.A.; data curation, M.A. and E.K.; writing--original draft preparation, C.C.; writing--review and editing, E.K.; visualization, I.G.; supervision, I.G.; project administration. All authors have read and agreed to the published version of the manuscript.  
Figure 6: IRRE when a BESS is installed for 2020.  
Figure 7: IRRE when a BESS is installed for 2021.  
Funding: The paper includes partial results on flexibility assessment for transmission systems in line with the FLEXITRANSTORE project. This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 774407. Institutional Review Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: The data presented in this study are available on request from the corresponding author. The data are not publicly available due to privacy. Acknowledgments: The paper includes partial results on flexibility assessment for transmission systems in line with the FLEXITRANSTORE project. The authors are grateful to all the other partners cooperating in the project and the support received from them. This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No. 774407, for which the authors wish to express their gratitude. For further information, please check the website: www.flexitransstore.eu (accessed on 8 November 2021) [20]. Conflicts of Interest: The authors declare no conflict of interest. References