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This paper attempts to define a number of Ancillary Services that can be offered by converter-interfaced DRES and suggests methods for their measurement and quantification.

This paper proposes a novel protection philosophy for distribution grids of low short-circuit capacity and high CI-DRES penetration.

The paper presents a flexible information and communication technology (ICT) architecture to communicate the need for Ancillary Services (AS) from third party providers to the distributed renewable energy sources (DRES) in an efficient and scalable manner and elaborates on the respective requirements.

The paper introduces a new reference frame – the Reduced Reference Frame (RRF) – advancing the performance of the classical transformations of Fortescue, Clarke and Park.

This paper presents a novel approach to control a three-phase four-leg voltage source converter for grid-forming operation.

The paper proposes the Power System Hardware-in-the-Loop (PSHIL) concept as an holistic testing approach for smart grid technologies, precisely sets out the PSHIL architecture including respective components and provides three application examples from the University of Sevilla.

The paper describes a control strategy for grid-forming voltage source converter able to compensate harmonics and imbalances of the voltages at the point of common coupling.

This work presents a hierarchical control strategy to improve the stability of electrical networks with significant converter-interfaced generation (CIG).