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Implementation of EU’s Water Framework directive, meant to ensure sustainability of the hydropower production, may lead to new environmental constraints on hydropower systems. This can result in loss of production, reduced operational flexibility and consequently reduced income from production...

Grid integration aspects and system service provision possibilities are studied for a hypothetical wave power plant at a location off the west coast of Ireland. This wave power plant, consisting of eight wave energy converters, is based on the MegaRoller technology, an oscillating wave surge...

Optimisation tools for long-term grid planning considering flexibility resources require aggregated flexibility models that are not too computationally demanding or complex. Still, they should capture the operational benefits of flexibility sufficiently accurately for planning purposes. This article...

The electrical power system is under constant development, and multiple changes will occur in the upcoming years, leading to a more intelligent and active system with the integration of ICT, distributed generation, and flexible resources. The increased complexity obtained through the modernization...

This work addresses the process and economic performance of the production of gasoline and diesel range fuels from urban sewage sludge. The overall production route involves direct conversion of the sewage sludge to an intermediate oil phase, so-called biocrude, via hydrothermal liquefaction at near...

The behaviour of a single sub-millimetre-size water drop falling through a viscous oil while subjected to an electric field is of fundamental importance to industrial applications such as crude oil electrocoalescers. Detailed studies, both experimental and computational, have been performed...

This paper compares the impact on power system frequency transients from virtual inertia and Fast Frequency Reserve (FFR) provided by HVDC converters. Specifically, frequency nadir, Rate-of-Change-of-Frequency (RoCoF), and the required energy during the frequency support are evaluated. Two...