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João A. Peças Lopes é Doutorado em Engenharia Eletrotécnica e de Computadores pela FEUP, sendo Professor Catedrático desta Faculdade, onde leciona na graduação e pós graduação em Engenharia Eletrotécnica e de Computadores.

Foi durante 7 anos Director do Programa Doutoral de Sistemas Sustentáveis de Energia e Diretor do Curso de Estudos Avançados em Sistemas Sustentáveis de Energia na FEUP.

É membro do Conselho de Administração do INESC TEC.

É Vice-Presidente da Associação Portuguesa do Veículo Elétrico (APVE).

O Prof. Peças Lopes foi responsável pela participação do INESC TEC em vários projetos financiados pela União Europeia, nomeadamente os seguintes projetos - MICROGRIDS - Large Scale Integration of Micro Generation to Low Voltage Grids e MORE_MICROGRIDS -  Advanced Architectures and Control Concepts for More Microgrids and MERGE - Mobile Energy Resources for Grids of Electricity.

Liderou vários projetos de consultoria associados com a análise de impacto resultante da ligação de grandes volumes de produção eólica na Madeira, Açores, Sal, S. Vicente e S. Tiago, na Republica de Cabo Verde. Foi responsável por vário projetos de consultoria relacionados o impacto nas redes elétricas de Portugal continentes de parques eólicos de grandes dimensões.

Foi responsável pela definição dos requisitos técnicas para ligação de parques eólicos no Brasil, trabalhando como consultor do ONS. Coordenou estudos de consultoria para o Regulador Hungaro relativos à identificação do volume de produção eólica acomodável na rede elétrica local.Coordenou a participação do INESC TEC no projeto InovGrid.

Foi o Presidente do Júri do Concurso Internacional, lançado pelo Governo Português em 2005,  para Atribuição de Pontos de Ligação para Produção Eólica na Rede Elétrica de Portugal, tendo decido pela atribuição de licenças de cerca de 1800 MW.

Foi Membro do Executive Board do Consórcio Europeu EES/UETP e Presidente do Comité de Programa desta Associação de formação avançada.

Foi avaliador da Comissão Europieia e de Organizações de Ciência e Tecnologia em Portugal, França, Italia, Grécia, Finlandia, Dinamarca e Irlanda.

Foi durante mais de 4 anos coordenador da Unidade de Sistemas de Energia do INESC TEC.

É co-editor do Journal SEGAN - Sustainable Energy Grids and Networks.

Os seus principais domínios de interesse estão relacionados com Integração em Larga Escala de Fontes de Energia Renovável em Redes Elétricas (nomeadamente produção eólica), Análise do Comportamento Dinâmico, Microredes, SmartMetering, SmartGrids e Integração de Veículos Elétricos em Redes Elétricas.

Em 2012 recebeu o CIGRE Technical Committee Award a título de reconhecimento pelo sua contribuição excecional no Study Committee C6 – Distribution Systems and Dispersed Generation.

Prof. Peças Lopes é Fellow do IEEE
É membro do Power Systems Dynamic Performance Committee do IEEE PES.

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    João Peças Lopes
  • Cluster

    Energia
  • Cargo

    Diretor Associado
  • Desde

    01 março 1989
048
Publicações

2019

Long-Term Impact Evaluation of Advanced Under Frequency Load Shedding Schemes on Distribution Systems with DG Islanded Operation

Autores
Issicaba, D; da Rosa, MA; Resende, FO; Santos, B; Pecas Lopes, JAP;

Publicação
IEEE Transactions on Smart Grid

Abstract
This paper presents a long-term impact evaluation algorithm to assess advanced under frequency load shedding (UFLS) schemes on distribution systems with intentional islanding of distributed generation (DG). The algorithm is based on a combined discrete-continuous simulation (CDCS) model which is utilized to verify the effect of the schemes on reliability indices such as the System Average Interruption Frequency Index (SAIFI), System Average Interruption Duration Index (SAIDI) and Energy Not Supplied (ENS). Moreover, a Polynomial Neural Network (PNN)-based approach to advanced load shedding is implemented to support DG islanding in order to illustrate the applicability of the evaluation. Simulation results highlight the long-term effect of employing UFLS to support intentional islanding of DG using an actual network from the South of Brazil. IEEE

2019

Smart transformers - Enabling power-frequency regulation services for hybrid AC/DC networks

Autores
Rodrigues, J; Moreira, C; Lopes, JP;

Publicação
2019 IEEE Milan PowerTech, PowerTech 2019

Abstract
The progressive decommissioning of large synchronous generators that should take place in face of increasing penetration ratios of Distributed Generation (DG) will demand additional control mechanisms for inertia provision and frequency and voltage regulation in the power system. The need to cope with increasing penetration ratios of DG in distribution grids, added to the necessity to integrate an expected massification of EV and distributed ESS, and to the necessity to enhance Power System resilience and controllability, makes the Smart-Transformer (ST) a suitable solution. In this paper it is demonstrated the feasibility of the ST to contribute to frequency control through the control of the resources available in the distribution AC/DC hybrid networks created from the ST. The feasibility of local droop controllers, acting on frequency and voltage magnitude of the AC/DC hybrid networks created from the ST, to achieve the aforementioned goal, is demonstrated through computational simulation. © 2019 IEEE.

2019

The future of power systems: Challenges, trends, and upcoming paradigms

Autores
Lopes, JAP; Madureira, AG; Matos, M; Bessa, RJ; Monteiro, V; Afonso, JL; Santos, SF; Catalão, JPS; Antunes, CH; Magalhães, P;

Publicação
Wiley Interdisciplinary Reviews: Energy and Environment

Abstract

2018

Modulation Strategy for a Single-stage Bidirectional and Isolated AC-DC Matrix Converter for Energy Storage Systems

Autores
Varajao, D; Araujo, RE; Miranda, LM; Pecas Lopes, JAP;

Publicação
IEEE Transactions on Industrial Electronics

Abstract
This paper presents a new modulation and control strategies for high-frequency link matrix converter. The proposed method aims to achieve controllable power factor in the grid interface as well voltage and current regulation for a battery energy storage device. The matrix converter is a key element of the system, since performs a direct AC to AC conversion between the grid and the power transformer, dispensing the traditional DC-link capacitors. Therefore, the circuit volume and weight are reduced and a longer service life is expected when compared with the existing technical solutions. A prototype was built to validate the mathematical analysis and the simulation results. Experimental tests developed in this research show the capability to control the grid currents in the synchronous reference frame in order to provide grid services. Simultaneously, the battery current is well regulated with small ripple which makes this converter ideal for battery charging of electric vehicles and energy storage applications. IEEE

2018

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

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

Publicação
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.

Teses
supervisionadas

2018

Engaging researchers in research data management: creating metadata models for multi-domain dataset description

Autor
João Daniel Aguiar de Castro

Instituição
UP-FEUP

2017

Multi Energy System Operation and Planning

Autor
António Manuel Freitas Coelho

Instituição
UP-FEUP

2017

Islanding Operation and Black Start Strategies for Multi-Microgrids using the Smart Transformer

Autor
Mário Jorge Teixeira Couto

Instituição
UP-FEUP

2017

Assessing the Impact of Short Term Dynamics on Microgrids Architectures

Autor
João Carlos Barreira Guerra Iria

Instituição
UP-FEUP

2016

Provision of Advanced Ancillary Services through Demand Side Integration

Autor
Miguel Luís Delgado Heleno

Instituição
UP-FEUP