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Sobre

Sobre

Nascido em 1967 em Madrid, José Villar é investigador sénior do Centro de Sistemas de Energia do INESC TEC desde 2017, sendo atualmente responsável pela área de Mercados de Eletricidade que se dedica à modelação e regulação dos mercados de eletricidade num contexto de descarbonização e descentralização do sistema energético. Doutorado pela "Escuela Técnica Superior de Ingenieria-ICAI" da "Universidad Pontificia Comillas" (Madrid) em 1997, foi membro do "Instituto de Investigación Tecnológica -IIT" da mesma universidade e subdiretor de 2004 a 2016, e Professor Associado até 2017 na mesma universidade. Participou em mais de 80 projectos de investigação com a indústria e as administrações, e foi co-autor de mais de 140 artigos de investigação em revistas e conferências internacionais. As suas áreas de interesse centram-se na modelização e regulação dos mercados de electricidade, na integração de fontes de energia renováveis e na descentralização do sistema energético.

Tópicos
de interesse
Detalhes

Detalhes

  • Nome

    José Villar
  • Cargo

    Responsável de Área
  • Desde

    01 setembro 2016
028
Publicações

2024

The Role of Batteries in Maximizing Green Hydrogen Production with Power Flow Tracing

Autores
Dudkina E.; Villar J.; Bessa R.J.; Crisostomi E.;

Publicação
4th International Conference on Smart Grid and Renewable Energy, SGRE 2024 - Proceedings

Abstract
Hydrogen is currently getting more and more attention in the European climate strategy as a promising enabling technology to decarbonize industry, transport sector and to provide a long-term, high-capacity energy storage solution. However, to truly contribute to the reduction of CO2 emissions, hydrogen must be produced respecting a principle of additionality, to ensure that it is produced using renewable energy sources and that its production does not decrease the green energy supplied to other loads. This study tracks the share of renewables generation in the energy mix used to produce hydrogen by applying a power flow tracing technique integrated with an optimal power flow analysis. This method allows the minimization of the system operation costs, while maximizing the green hydrogen production and considering the additionality principle. The system cost function is also modified to include the sizing and allocation of conventional batteries in the grid, and assess their ability to further increase the share of green energy in hydrogen production.

2024

Energy allocation and settlement in collective self-consumption

Autores
Mello, J; Rodrigues, L; Villar, J; Saraiva, J;

Publicação
2024 20TH INTERNATIONAL CONFERENCE ON THE EUROPEAN ENERGY MARKET, EEM 2024

Abstract
Energy allocation rules are one of the core aspects of collective self-consumption (CSC) regulations. It allows final consumers to share their surplus generation with other CSC members, while keeping their full rights as consumers, i.e., maintaining a supply contract with the retailers of their choice. Some European Union member states regulations use allocation coefficients so that local allocations are integrated with wholesale settlement and directly affect the retailers' billing. Several AC methods have been proposed so far, each one adapted to distribution system operators' settlement procedures with specific rules that can impact the benefits that each CSC member obtain. This paper analyses, assesses and compares two relevant AC methods, namely pre-delivery fixed AC and post-delivery dynamic AC, by developing a settlement formulation for a community with members with flexible assets and different opportunity costs. AC policy recommendations based on findings are provided.

2024

Building Flexibility Bidding Curves for Energy Communities

Autores
Rodrigues, L; Mello, J; Ganesan, K; Silva, R; Villar, J;

Publicação
2024 20TH INTERNATIONAL CONFERENCE ON THE EUROPEAN ENERGY MARKET, EEM 2024

Abstract
The integration of renewable generation requires new sources of flexibility, including the flexibility from distributed resources that can be unlocked via local flexibility markets (LFMs). In these markets, aggregators (AGGs) offer the flexibility from their portfolios to the flexibility requesting parties (FRP), i.e. system operators or other balancing requesting parties. To bid in LFMs and manage market uncertainty, AGGs must compute the flexibility they are willing to offer at each possible flexibility market price, by optimizing their portfolios. This paper proposes a 2-stage methodology to compute the flexibility bidding curve that an energy community can send to a LFM when behaving as an AGG of its members resources. At stage 1, the energy community (EC) manager computes the optimal EC operation without flexibility provision, minimizing the EC energy bill, and serving as the baseline to verify the flexibility provision. Then, at stage 2, for each possible flexibility price, the EC manager computes the optimal flexibility to be offered, minimizing the EC energy bill but including the flexibility provision incomes, to build the flexibility bidding curve.

2024

Review of commercial flexibility products and market platforms

Autores
Rodrigues, L; Ganesan, K; Retorta, F; Coelho, F; Mello, J; Villar, J; Bessa, R;

Publicação
2024 20TH INTERNATIONAL CONFERENCE ON THE EUROPEAN ENERGY MARKET, EEM 2024

Abstract
The European Union is pushing its members states to implement regulations that incentivize distribution system operators to procure flexibility to enhance grid operation and planning. Since flexibility should be obtained using market-based solutions, when possible, flexibility market platforms become essential tools to harness consumer-side flexibility, supporting its procurement, trading, dispatch, and settlement. These reasons have led to the appearance of multiple flexibility market platforms with different structure and functionalities. This work provides a comprehensive description of the main flexibility platforms operating in Europe and provides a concise review of the platform main characteristics and functionalities, including their user segment, flexibility trading procedures, settlement processes, and flexibility products supported.

2024

Virtual Batteries Business Models for Energy Suppliers

Autores
Gomes, I; Sousa, JVJ; Sousa, J; Lucas, A;

Publicação
2024 20TH INTERNATIONAL CONFERENCE ON THE EUROPEAN ENERGY MARKET, EEM 2024

Abstract
Self-consumption regulations are leading to the emergence of new business models proposed by new players and causing traditional players to make new proposals to take advantage of the new business opportunities. In this context, traditional retailers are assessing self-consumption business models, offering management services for self-consumption structures, or the installation of distributed resources, such as solar panels or batteries. Some of the new business models being proposed by electricity suppliers are related to virtual battery services. Indeed, suppliers can, in the free retail market, create innovative tariffs, and design them to make their customers believe they own and manage a battery, even if it does not correspond to a physical battery in the grid. This paper analyses the business model of a supplier offering a virtual battery service, comparing it to the installation of a physical battery, showing that it has no significant benefits compared to more simple approaches.

Teses
supervisionadas

2023

Local Electricity Market Simulator for Energy Communities

Autor
João Miguel da Costa Pinho

Instituição

2023

Modelling the Italian Electricity Market in CEVESA Market Model

Autor
Manuel Molina González

Instituição

2023

Comportamiento del Auto-consumidor de electricidad e impacto en el mercado eléctrico

Autor
Manuel Molina González

Instituição

2023

Comunidades de Energia Renovável: Decisão ótima de investimento em energia solar fotovoltaica/eólica e partilha eficiente de eletricidade verde entre membros

Autor
Inês Pequito Marques Carvalho

Instituição

2023

Local Electricity Market Simulator for Energy Communities

Autor
Pedro Henrique de Souza Guimarães

Instituição