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About

About

I’m a Senior Researcher at INESC TEC and an Assistant Professor at FEUP. I’m specialized in dynamic behavior studies and security operation analysis of power systems and also on the application of automatic learning techniques to obtain an optimal and secure operation of power systems. I have participated in many consultancy projects, manly related with the dynamic security of isolated power systems with a high penetration of renewable power production. I have also strongly participated in R&D projects related with power systems secure control.

Interest
Topics
Details

Details

  • Name

    Helena Vasconcelos
  • Cluster

    Power and Energy
  • Role

    Senior Researcher
  • Since

    01st January 1999
011
Publications

2018

Stability of autonomous power systems with reversible hydro power plants: A study case for large scale renewables integration

Authors
Beires, P; Vasconcelos, MH; Moreira, CL; Pecs Lopes, JAP;

Publication
Electric Power Systems Research

Abstract
This paper addresses the dynamic stability analysis of an islanded power system regarding the installation of a reversible hydro power plant for increasing renewable energy integration. Being a high-head facility, the hydro power plant consists of separated pumps and turbines (Pelton type). In order to properly support the identification of hydro pumps connection requirements and the technology to be used, different options were taken into consideration, namely: fixed speed pumps coupled to induction machines directly connected to the grid and adjustable speed pumps supplied by a drive system. Extensive numerical simulations of the power system's dynamic behaviour response allowed the evaluation of the hydro power plant's role for the purpose of grid stability conditions. These simulations showed that the high-head hydro power installation provides a marginal contribution to system frequency regulation when explored in turbine operation mode, leading to a reversible power station with a single penstock. Moreover, due to the significant additional system load introduced by the hydro pumping units, the obtained results clearly indicate that supplementary regulation flexibility is required to attend the need of assuring the stable operation of the system in case of critical disturbances such as grid faults. The study case demonstrates that, although the foreseen operation of a reversible hydro power plant creates new security challenges to overcome in an autonomous power system, robust technical solutions can be identified without increasing, from the local system operator's perspective, the operation complexity of the power system. © 2018 Elsevier B.V.

2017

Managing forecast uncertainty in power system security assessment

Authors
Ciapessoni, E; Cirio, D; Pitto, A; Omont, N; Vasconcelos, MH; Carvalho, LM;

Publication
2017 4th International Conference on Control, Decision and Information Technologies (CoDIT)

Abstract

Supervised
thesis

2016

Avaliação rápida de sobrecargas pós-contingência em ramos de sistemas elétricos interligados

Author
Ricardo Jorge de Lima Capão

Institution
UP-FEUP

2016

0

Author
Rosária Maria Afonso Rodrigues de Melo

Institution
UP-FCNA

2016

Estudo de Condições de Viabilidade da Manutenção em Serviço de Produção Distribuída em Situações de Contingência na Rede AT

Author
João Paulo Martins Santos Fernandes

Institution
UP-FEUP

2015

Avaliação Rápida de Sobrecargas Pós-Contingência em Ramos de Sistemas Elétricos Interligados

Author
Ricardo Jorge de Lima Capão

Institution
UP-FEUP