Model based evaluation of electricity network investments with regional importance

The paper analyses the complex welfare impacts of proposed transmission investments in the Central Eastern Europe (CEE) region with the application of the EEMM electricity model. This assessment is made at regional level, as new transmission lines have significant spill-over effects over third countries. We carry out a cost-benefit assessment (CBA) focused on the CEE region and demonstrate, that the EEMM model is a suitable tool to carry out such assessment. Using a simplified cost-benefit analysis — limited by the available information on the projects — we mimic the process of identifying those transmission lines that increase the regional welfare the most. Our results indicate that new infrastructure elements cause significant and asymmetric wealth redistribution among group of stakeholders and between countries as well. Interactions between planned transmission line developments must be identified, as they could significantly change the benefits of those lines connecting the interlinked markets.