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About

About

Fábio Sester Retorta is an electrical engineer graduated at the Federal University of Paraná (UFPR). During his time in Brazil, he worked for 3 years with ANEEL R & D projects and services in the area of electric power quality by the company Lactec. Fábio earned his master's degree in UFPR with the theme of an ANEEL R & D project being awarded 1 place in the CIGRE Showcase Paris 2018. Since 2015 the researcher has been contributing with publications in international events, chapters of Brazilian books and Brazilian periodicals. The researcher has been working with the themes: electric power quality of wind farms / GD, operation of distributed generation, storage systems, solar thermal energy (CSP), rural electrification, multicriteria methodologies, fuzzy systems, optimization, forecasting methods, and planning of distribution systems. Fábio has taught classes at SENAI and CEPS (technical schools in Brazil) and is a member of the C6 group of CIGRÉ. He currently works at CPES with topics related to energy markets, deregulated electricyty markets, flexibilities in electricity markets, OPF and optimization methods

Interest
Topics
Details

Details

  • Name

    Fábio Retorta
  • Cluster

    Power and Energy
  • Role

    Research Assistant
  • Since

    18th February 2019
003
Publications

2020

Local Market for TSO and DSO Reactive Power Provision Using DSO Grid Resources

Authors
Retorta, F; Aguiar, J; Rezende, I; Villar, J; Silva, B;

Publication
Energies

Abstract
This paper proposes a near to real-time local market to provide reactive power to the transmission system operator (TSO), using the resources connected to a distribution grid managed by a distribution system operator (DSO). The TSO publishes a requested reactive power profile at the TSO-DSO interface for each time-interval of the next delivery period, so that market agents (managing resources of the distribution grid) can prepare and send their bids accordingly. DSO resources are the first to be mobilized, and the remaining residual reactive power is supplied by the reactive power flexibility offered in the local reactive market. Complex bids (with non-curtailability conditions) are supported to provide flexible ways of bidding fewer flexible assets (such as capacitor banks). An alternating current (AC) optimal power flow (OPF) is used to clear the bids by maximizing the social welfare to supply the TSO required reactive power profile, subject to the DSO grid constraints. A rolling window mechanism allows a continuous dispatching of reactive power, and the possibility of adapting assigned schedules to real time constraints. A simplified TSO-DSO cost assignment of the flexible reactive power used is proposed to share for settlement purposes.

2020

Flexibility hub – Flexibility provision by decentralised assets connected to the distribution grid

Authors
Filipe, NL; Marques, M; Villar, J; Silva, B; Moreira, J; Louro, M; Retorta, F; Aguiar, J; Rezende, I; Simões, T; Marinho, N;

Publication
IET Conference Publications

Abstract
EU-SysFlex H2020 project aims at developing and testing innovative tools for the integration of high levels (above 50%) of renewable energy sources (RES) in the pan-European Electricity system. Those high levels of RES will increase the need for new sources of flexibility to support the system services, since there will be a decreasing number of conventional power plants connected to the grid, traditionally the main providers of these services. In this context, this study describes the Flexibility Hub (FlexHub) concept, part of the EU-SysFlex Portuguese demonstrator, consisting of a platform of tools managed by the distribution system operator to facilitate market-based flexibility provision to the transmission system operator (TSO) using resources connected to the distribution system. The FlexHub includes the provision of active power flexibility to the TSO (with an extended restoration reserve market concept), an essential tool to help the TSO balancing the grid, being a replicable concept that will become increasingly relevant in a future with a high share of decentralised assets connected to the distribution grids.