Browsing by Author "Martínez, Sergio"

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    Analysis of control strategies based on virtual inertia for the improvement of frequency stability in an islanded grid with wind generators and battery energy storage systems
    (2021) Ochoa Correa, Danny Vinicio
    Rising levels of non-synchronous generation in power systems are leading to increasing difficulties in primary frequency control. In response, there has been much research effort aimed at providing individual electronic interfaced generators with different frequency response capabilities. There is now a growing research interest in analyzing the interactions among different power system elements that include these features. This paper explores how the implementation of control strategies based on the concept of virtual inertia can help to improve frequency stability. More specifically, the work is focused on islanded systems with high share of wind generation interacting with battery energy storage systems. The paper presents a methodology for modeling a power system with virtual primary frequency control, as an aid to power system planning and operation. The methodology and its implementation are illustrated with a real case study.
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    Contribution of electric vehicles to power system ancillary services beyond distributed energy storage
    (Universidad Politécnica de Madrid, 2019) Ochoa Correa, Danny Vinicio
    Current electric power systems are experiencing a steady growth in renewable electricity generation and in energy consumption from electric vehicles (EV), involving a number of impacts on the system that increase with the penetration level and the system weakness. As conventional synchronous generation is being displaced by renewable generators, they must take their share in the ancillary services provision and supplementary equipment has to be installed, with its associated cost. This chapter describes how EVs, already connected to the grid with appropriate electronic converters and controls, can be used for contributing to the provision of frequency and voltage control, thus avoiding additional investment in supplementary equipment. The chapter also presents innovative approaches for both ancillary services, based on previous developments in electricity generation from wind and wave energies.