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About

About

Joao Silva was born in Póvoa de Varzim, Portugal. He graduated in Electrotechnical and Computers Engineering in 2014 and is now pursuing the corresponding Ph.D. degree in FEUP, the Faculty of Engineering of the University of Porto, Portugal. In 2014, he joined the Center for Power and Energy Systems (CPES) of INESC Technology and Science (INESC TEC), as a researcher where he actively participated in the evolvDSO European project under the seventh framework program (FP7). His main fields of interest are related with optimizing the operation of distribution and transmission networks as well as with network asset management. 

Interest
Topics
Details

Details

  • Name

    João Vieira Silva
  • Cluster

    Power and Energy
  • Role

    Research Assistant
  • Since

    23rd October 2014
Publications

2018

The challenges of estimating the impact of distributed energy resources flexibility on the TSO/DSO boundary node operating points

Authors
Silva, J; Sumaili, J; Bessa, RJ; Seca, L; Matos, M; Miranda, V;

Publication
Computers and Operations Research

Abstract
The increasing penetration of renewable energy sources characterized by a high degree of variability and uncertainty is a complex challenge for network operators that are obligated to ensure their connection while keeping the quality and security of supply. In order to deal with this variable behavior and forecast uncertainty, the distribution networks are equipped with flexible distributed energy resources capable of adjusting their operating point to avoid technical issues (voltage problems, congestion, etc.). Within this paradigm, the flexibility that, in fact, can be provided by such resources, needs to be estimated/forecasted up to the transmission network node (primary substation) and requires new tools for TSO/DSO coordination. This paper addresses this topic by developing a methodology capable of finding the flexibility area while taking into account the technical grid constraints. The proposed approach is based on the formulation of a single optimization problem which is run several times, according with the expected precision for the flexibility area estimation. To each optimization problem run, a different objective function belonging to a family of straight lines is assigned. This allows exploring the active and reactive power flow limits at the TSO/DSO boundary nodes - which define the flexibility area. The effectiveness of the proposed model has been evaluated on two test networks and the results suggest a step forward in the TSO/DSO coordination field. Nevertheless, further investigations to study the effect of assets with discrete control nature (e.g., on load tap changers - OLTC, capacitor banks) on the occurrence of disjoint flexibility areas should be carried. © 2017 Elsevier Ltd.

2018

Estimating the Active and Reactive Power Flexibility Area at the TSO-DSO Interface

Authors
Silva, J; Sumaili, J; Bessa, RJ; Seca, L; Matos, MA; Miranda, V; Caujolle, M; Goncer, B; Sebastian Viana, M;

Publication
IEEE Transactions on Power Systems

Abstract

2017

LV state estimation and TSO–DSO cooperation tools: results of the French field tests in the evolvDSO project

Authors
Viania Sebastian, M; Caujolle, M; Goncer Maraver, B; Pereira, J; Sumaili, J; Barbeiro, P; Silva, J; Bessa, R;

Publication
CIRED - Open Access Proceedings Journal

Abstract

2016

Assessing DER flexibility in a German distribution network for different scenarios and degrees of controllability

Authors
Silva, A; Carvalho, L; Bessa, R; Sumaili, J; Seca, L; Schaarschmidt, G; Silva, J; Matos, M; Hermes, R;

Publication
IET Conference Publications

Abstract
This paper evaluates the flexibility provided by distributed energy resources (DER) in a real electricity distribution network in Germany. Using the Interval Constrained Power Flow (ICPF) tool, the maximum range of flexibility available at the primary substation was obtained for different operation scenarios. Three test cases were simulated, differing mainly in the considered level of renewable energy sources (RES) production. For each test case, the obtained results enabled the construction of flexibility areas that define, for a given operating point, the limits of feasible values for the active and reactive power that can be exchanged between the TSO and the DSO. Furthermore, the tool can also be used to evaluate the contribution from each type of DER to the overall distribution network flexibility.

2016

EvolvDSO grid management tools to support TSO-DSO cooperation

Authors
Fonseca, N; Silva, J; Silva, A; Sumaili, J; Seca, L; Bessa, R; Pereira, J; Matos, M; Matos, P; Morais, AC; Caujolle, M; Sebastian Viana, M;

Publication
IET Conference Publications

Abstract
This paper presents two contributions developed in the framework of evolvDSO Project to support TSO-DSO cooperation. The Interval Constrained Interval Power Flow (ICPF) tool estimates the flexibility range at primary substations by aggregating the distribution network flexibility. The Sequential Optimal Power Flow (SOPF) tool defines a set of control actions that keep the active and reactive power flow within pre-agreed limits at primary substations level, by integrating different types of flexibility levers. Several study test cases were simulated using data of four real distribution networks from France and Portugal, with different demand/generation profiles and several degrees of flexibility.