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Research Project
Tools for the Design and modelling of new markets and negotiation mechanisms for a ~100% Renewable European Power Systems
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Publications
Impacto da integração em larga escala de capacidade solar fotovoltaica nos preços do mibel: análise da remuneração das centrais fotovoltaicas em ambiente de mercado
Publication . Couto, António; Algarvio, Hugo; Lopes, Fernando; Estanqueiro, Ana
RESUMO: Este artigo visa avaliar e compreender o impacto da integração em larga escala da tecnologia solar fotovoltaica (PV) no mercado ibérico de eletricidade. Esse impacto foi avaliado considerando as projeções de capacidade solar a instalar em Portugal, de acordo com Plano Nacional de Energia e Clima (PNEC) 2030, usando o modelo multi-agente MATREM (for Multi-Agent Trading in Electricity Markets) como simulador do mercado de eletricidade. Os resultados sugerem que tomando como referência aos valores observados em 2016, com as capacidades instaladas projetadas no PNEC, é possível uma redução do preço médio no mercado do dia seguinte de 8.03 €/MWh, passando de um valor de 53.55 €/MWh para 45.52 €/MWh. Analisando as horas do dia onde é expectável existir produção solar, a redução do preço médio é mais significativa, e igual a 10.33 €/MWh. Face aos valores atuais do custo de instalação desta tecnologia, o valor médio obtido sugere que é viável aos produtores optarem por uma remuneração em ambiente de mercado. Assim, para além dos benefícios ambientais, a integração da tecnologia solar PV em larga escala pode ter um impacto socioeconómico muito positivo.
The role of local citizen energy communities in the road to carbon-neutral power systems: outcomes from a case study in Portugal
Publication . Algarvio, Hugo
ABSTRACT: Global warming contributes to the worldwide goal of a sustainable carbon-neutral society. Currently, hydroelectric, wind and solar power plants are the most competitive renewable technologies. They are limited to the primary resource availability, but while hydroelectric power plants (HPPs) can have storage capacity but have several geographical limitations, wind and solar power plants have variable renewable energy (VRE) with stochastic profiles, requiring a substantially higher investment when equipped with battery energy storage systems. One of the most affordable solutions to compensate the stochastic behaviour of VRE is the active participation of consumers with demand response capability. Therefore, the role of citizen energy communities (CECs) can be important towards a carbon-neutral society. This work presents the economic and environmental advantages of CECs, by aggregating consumers, prosumers and VRE at the distribution level, considering microgrid trades, but also establishing bilateral agreements with large-scale VRE and HPPs, and participating in electricity markets. Results from the case-study prove the advantages of CECs and self-consumption. Currently, CECs have potential to be carbon-neutral in relation to electricity consumption and reduce consumers' costs with its variable term until 77%. In the future, electrification may allow CECs to be fully carbon-neutral, if they increase their flexibility portfolio.
Decarbonization of electricity systems in Europe: market design challenges
Publication . Strbac, Goran; Papadaskalopoulos, Dimitrios; Chrysanthopoulos, Nikolaos; Estanqueiro, Ana; Algarvio, Hugo; Lopes, Fernando; Vries, Laurens de; Morales-España, Germán; Sijm, Jos; Hernandez-Serna, Ricardo; Kiviluoma, Juha; Helistö, Niina
ABSTRACT: Driven by climate change concerns, Europe has taken significant initiatives toward the decarbonization of its energy system. The European Commission (EC) has set targets for 2030 to achieve at least 40% reduction in greenhouse gas emissions with respect to the 1990 baseline level and cover at least 32% of the total energy consumption in the European Union (EU) through renewable energy sources, predominantly wind and solar generation. However, these technologies are inherently characterized by high variability, limited predictability and controllability, and lack of inertia, significantly increasing the balancing requirements of the system with respect to historical levels. The flexibility burden is currently carried by flexible fossil-fueled conventional generators (mainly gas), which are required to produce significantly less energy (as low operating cost and CO2-free renewable and nuclear generation are prioritized in the merit order) and operate part loaded with frequent startup and shut-down cycles, with devastating effects on their cost efficiency.
Agent-based model of citizen energy communities used to negotiate bilateral contracts in electricity markets
Publication . Algarvio, Hugo
ABSTRACT: The worldwide targets for carbon-neutral societies increased the penetration of distributed generation and storage. Smart cities now play a key role in achieving these targets by considering the alliances of their demand and supply assets as local citizen energy communities. These communities need to have enough weight to trade electricity in wholesale markets. Trading of electricity can be done in spot markets or by bilateral contracts involving customers and suppliers. This paper is devoted to bilateral contracting, which is modeled as a negotiation process involving an iterative exchange of offers and counter-offers. This article focuses on local citizen energy communities. Specifically, it presents team and single-agent negotiation models, where each member has its sets of strategies and tactics and also its decision model. Community agents are equipped with intra-team strategies and decision protocols. To evaluate the benefits of CECs, models of both coalition formation and management have been adapted. This paper also describes a case study on forward bilateral contracts, involving a retailer agent and three different types of citizen energy communities. The results demonstrate the benefits of CECs during the negotiation of private bilateral contracts of electricity. Furthermore, they also demonstrate that in the case of using a representative strategy, the selection of the mediator may be critical for achieving a good deal.
From Wind to Hybrid: A Contribution to the Optimal Design of Utility-Scale Hybrid Power Plants
Publication . Silva, Ana Rita; Estanqueiro, Ana
ABSTRACT: When a substantial number of wind parks are approaching the end of their lifespan, and developers of renewables are facing decisions about what to do with their assets, concepts such as hybrid power plants are emerging as a promising solution to enable renewable integration in a cost-effective and robust manner. This work proposes a decision-aid algorithm to perform a comprehensive analysis of hybrid power plants, focusing on the energetic contribution and economic feasibility of converting existing wind power plants into hybrid power plants (i.e., installing photovoltaic panels and a storage system). The analysis was performed by comparing the option of converting existing wind plants into hybrid plants with a pure repowering exercise or overplanting using wind technology only. The obtained results unequivocally demonstrate the added value of hybrid power plants as they promote: (i) a higher installed capacity and yearly capacity factor (up to 50%); (ii) an increased efficiency of existing electric infrastructures; and (iii) a positive contribution to a sustainable energy system with the ability to generate economic value.
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Funding agency
European Commission
Funding programme
H2020
Funding Award Number
864276