Inês Roça

Redes Energéticas Nacionais (Portugal)

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Co-Authors

Pedro M. S. Carvalho

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento

L. Coelho

Redes Energéticas Nacionais (Portugal)

Ricardo Prata

Redes Energéticas Nacionais (Portugal)

Luísa Jorge

Polytechnic Institute of Bragança

Ricardo Ferreira Bento

Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo

João Rafael

Redes Energéticas Nacionais (Portugal)

Jorge Viais

Energias de Portugal (Portugal)

AÁ

André Águas

Luís Marcelino Ferreira

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento

Vera Lúcia Duarte do Valle Pereira

Universidade Federal de Santa Catarina

Cooperative Institutions

Redes Energéticas Nacionais (Portugal)

Energias de Portugal (Portugal)

Institute for Systems Engineering and Computers

University of Lisbon

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento

Universidade do Porto

Universidade Federal de Santa Maria

Instituto Politécnico de Lisboa

University of Coimbra

INESC TEC

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E-REDES flexibility strategy to enhance distribution system hosting capacity

IET conference proceedings. (2025)

Maria C. Teixeira Luís Ascenso Inês Roça Eduardo de Rezende Francisco João Rafael

10.1049/icp.2024.2108

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Citations (0)

Solving Ill-Conditioned State-Estimation Problems in Distribution Grids With Hidden-Markov Models of Load Dynamics

IEEE Transactions on Power Systems (2019)

Inês Roça Pedro M. S. Carvalho

Future smart grid operations must rely upon accurate state estimation (SE). Estimation at the distribution level is very challenging since the customary monitoring infrastructure inhibits access to real-time widespread information, precluding redundancy. To overcome the lack of redundancy, we propose to use Markov information on load dynamics instead of load pseudo-measurements directly. The proposed SE methodology Combines a (i) regularization-based method for solving ill-conditioned load-estimation problems with (ii) a Markov model for restricting load variations to probable time-varying load changes. Two Markov approaches are implemented. First, Markov information is used to estimate load one-step ahead, allowing a simple forward dynamic estimation. Then, the SE problem is formulated as a Hidden Markov problem and solved with the Viterbi algorithm to estimate load evolution. Several monitoring contexts are finally analyzed to illustrate the approaches proposed and to discuss the limitations of their application in realistic contexts.

Viterbi algorithm

Forward algorithm

10.1109/tpwrs.2019.2928211

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Citations (6)

Risk-controlled planning methodology: comparison between stochastic and deterministic approaches

CIRED - Open Access Proceedings Journal (2020)

Inês Roça Luís M. Coelho João Machado Jorge Viais Luísa Jorge

The evolution of the electrical system towards decentralisation, with intermittent generation and responsive loads, has created important challenges in terms of planning and operating the distribution grid. Being aware of such challenges, EDP Distribuição developed a data analytics methodology to better understand loads and generation patterns and enhance the support to investment decisions by embracing through an explicit risk-controlled probabilistic paradigm. This study presents a comparison between an investment analysis based on a static approach of loads and an analysis based on the stochastic properties of loads and generation profiles. Furthermore, the authors will discuss the impact of such change on the EDP Distribuição operations.

Investment

10.1049/oap-cired.2021.0008

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Citations (1)

Data Analytics and Stochastic Simulation Methods for Risk-Controlled Network Planning: Validation Case Study

André Águas Vera Lúcia Duarte do Valle Pereira Inês Roça Luísa Jorge Ricardo Prata

Data Analysis

10.34890/366

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The conceptualisation of flexibility solutions as an alternative to traditional investment

IET conference proceedings. (2023)

Inês Roça L. Coelho Ricardo Ferreira Bento

In recent years the electrical system has been challenged by the high proliferation of distributed generation and the emergence of loads with new consumption dynamics. In Portugal, this changing context has been accompanied by a massive deployment of metering infrastructure, which creates an in-depth knowledge of load dynamics. Building upon these developments, E-REDES, the Portuguese Distribution System Operators (DSO), has been challenged to provide solutions where one acting upon electrical loads eliminates technical constraints, in a system named flexibility. This paper presents the findings of several analyses performed and details the case of the failure of the MV bus at the Alcanede Primary Substation. Furthermore, we will discuss challenges that E-REDES expects to face in this new paradigm of operation and planning of the electrical grid.

Investment

Metering mode

Consumption

10.1049/icp.2023.0715

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Flexibility: bridging the gap between planning and market

IET conference proceedings. (2025)

Inês Roça L. Coelho Ricardo Ferreira Bento João Rafael Pedro M. S. Carvalho

The planning and operation of the distribution grid have been challenged by the high proliferation of distributed generation and the emergence of loads with new consumption dynamics. Nevertheless, these changes were accompanied by a massive deployment of metering infrastructure allowing an in-depth knowledge of load dynamics. Building on these developments, Portuguese Distribution System Operators (DSOs) has been challenged to provide alternatives to reinforcement investment consisting of market-based flexibility services. Since then, E-REDES has developed an effort, along with other stakeholders, to incorporate these alternatives into grid planning and operation and promote the development of this new market. This new paradigm involved the development of the current grid analysis tool –DPlan– to provide the flexibility service requirements for a particular grid congestion. The methodology to assess investment projects also evolved to evaluate the potential of flexibility services as a viable alternative to investment. Finally, a pilot project – FIRMe – was launched to develop internal knowledge on the subject, allowing define priorities for grid flexibility as an alternative to the investment.

10.1049/icp.2024.2015

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Citations (1)