SIREN project successfully concluded


After a term of three years, the Croatian research project “Smart Integration of RENewables” (in short: SIREN) has been brought to a satisfactory completion by the project partners, one of whom is TSCNET shareholder HOPS, the transmission system operator (TSO) from Croatia. Together with the Croatian Science Foundation, HOPS was also the funder of the scientific research on the optimisation of current and the development of new system management strategies for the large-scale integration of volatile electricity capacities from renewable sources.

An assessment of the capacity of the transmission grid and the production units was carried out in order to determine flexibility requirements. As second part of the project, the potentials of energy storage units in the transmission system – e.g. pumped-storage power plants, battery systems or flywheels – were evaluated. Finally, also regulatory aspects of the large-scale integration of storage solutions were subject of the research.

Notwithstanding the successful and timely development of solution models and implementation propositions, HOPS will by no means cease its activities in this future-oriented sector. The H2020 project within the CROSSBOW project (“CROSS BOrder management of variable renewable energies and storage units enabling a transnational Wholesale market”), in which HOPS is actively involved, is a kind of continuation of SIREN. The multi-partner project CROSSBOW with a focus on Southeast Europe was launched in November 2018 in the Bulgarian capital of Sofia, with HOPS presiding over one subproject and one working package.

The SIREN project on the integration of the renewables and grid optimisation has been successfully completed

> See HOPS press release, in Croatian (html)
> Visit SIREN website (html)

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CROSSBOW kick-off event in Sofia


Sometimes complex issues require adequately complex designations. This is the case with the research project for “CROSS BOrder management of variable renewable energies and storage units enabling a transnational Wholesale market”, or in short: CROSSBOW. This multi-partner project belongs to the currently most relevant innovation projects of the EU in the smart grids sector. It is financed by the European Commission with €17.99m under the framework of the Horizon 2020 programme. The kick-off meeting for CROSSBOW was held in the Bulgarian capital of Sofia on 9 and 10 November.

The CROSSBOW consortium consists of 24 commercial, non-profit and academic partners, among which are the transmission system operators (TSOs) from eight Southeast European countries (Bosnia-Herzegovina, Bulgaria, Croatia, Greece, Montenegro, the Republic of Macedonia, Romania and Serbia). The participating TSOs share a special interest in the two interrelated strategic goals of CROSSBOW: Enabling a higher share of renewables within the systems and the market on the one hand, and the reduction of operational costs to improve economic benefits on the other.

CROSSBOW is divided into six subprojects and nineteen work packages. TSCNET shareholder HOPS, the Croatian TSO, presides over subproject 6 (“Integration and demonstration”) and working package 13 (“Large scale demonstration activities of the integrated CROSSBOW eco system”). The duration of the project is four years, and in its later period, the eight TSOs will evaluate the outcomes of CROSSBOW and demonstrate the individual challenges of each participating country.

> See HOPS press release, in Croatian (html)
> Visit CROSSBOW website (“coming soon”, html)

Picture: Deensel (, Creative Commons)


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