Encontrados 15 documentos, a visualizar página 1 de 2
A real time pricing approach to deal with excessive wind power situations
Faria, Pedro; Vale, Zita; Morais, H.The introduction of wind power generation in several countries around the world, including in European countries, where energy policy directives have encouraged the use of renewables, led to several changes in market and power systems operation. The intensive integration of these sources has led to situations in which the demand is lower than the available renewable resources. In these situations a part of the ...
Real-time energy resources scheduling considering intensive wind penetration
Silva, Marco; Morais, H.; Vale, ZitaThe use of distributed energy resources, based on natural intermittent power sources, like wind generation, in power systems imposes the development of new adequate operation management and control methodologies. A short-term Energy Resource Management (ERM) methodology performed in two phases is proposed in this paper. The first one addresses the day-ahead ERM scheduling and the second one deals with the five-...
Energy resource scheduling considering reactive power management
Morais, H.; Vale, Zita; Sousa, TiagoThe reactive power management is an important task in future power systems. The control of reactive power allows the increase of distributed energy resources penetration as well as the optimal operation of distribution networks. Currently, the control of reactive power is only controlled in large power units and in high and very high voltage substations. In this paper a reactive power control in smart grids par...
Multi-criteria short-term maintenance outage scheduling in smart distribution s...
Mohammad, Ali F.G.; Morais, H.; Vale, ZitaEffective legislation and standards for the coordination procedures between consumers, producers and the system operator supports the advances in the technologies that lead to smart distribution systems. In short-term (ST) maintenance scheduling procedure, the energy producers in a distribution system access to the long-term (LT) outage plan that is released by the distribution system operator (DSO). The impact...
Advances in smart grids - benefits on sharing background experiences from Portu...
Vale, Zita; Styczynski, Zbigniew; Hadjsaid, Nouredine; Caire, Raphael; Souza, André; Rolim, Jacqueline; Ferreira, Golberi; Aquiles, José; Morais, H.This paper presents ELECON - Electricity Consumption Analysis to Promote Energy Efficiency Considering Demand Response and Non-technical Losses, an international research project that involves European and Brazilian partners. ELECON focuses on energy efficiency increasing through consumer´s active participation which is a key area for Europe and Brazil cooperation. The project aims at significantly contributing...
Electric vehicle scenario simulator tool for smart grid operators
Soares, João; Canizes, Bruno; Lobo, Cristina; Vale, Zita; Morais, H.This paper presents a simulator for electric vehicles in the context of smart grids and distribution networks. It aims to support network operator´s planning and operations but can be used by other entities for related studies. The paper describes the parameters supported by the current version of the Electric Vehicle Scenario Simulator (EVeSSi) tool and its current algorithm. EVeSSi enables the definition of e...
Energy resources scheduling in competitive environment
Vale, Zita; Morais, H.; Pereira, NarcisoThe increasing use of distributed generation units based on renewable energy sources, the consideration of demand-side management as a distributed resource, and the operation in the scope of competitive electricity markets have caused important changes in the way that power systems are operated. The new distributed resources require an entity (player) capable to make them able to participate in electricity mark...
Energy resources management for more sustainable distribution systems: an intel...
Vale, Zita; Morais, H.; Ramos, Carlos; Khodr, H. M.; Faria, PedroEnergy Resources Management can play a very relevant role in future power systems in SmartGrid context, with high penetration of distributed generation and storage systems. This paper deals with the importance of resources management in incident situation. The system to consider a high penetration of distributed generation, demand response, storage units and network reconfiguration. A case study evidences the a...
Transmission tariffs in competitive electricity markets
Ferreira, Judite; Vale, Zita; Morais, H.In context of electricity market, the transmission price is an important tool to an efficient development of the electricity system. The electricity market is influenced by several factors; however the transmission network management is one of the most important aspects, because the network is a natural monopoly. The transmission tariffs can help to regulate the market, for that reason evaluate tariff must have...
Multi-agent systems and birtual producers in electronic marketplaces
Praça, Isabel; Viamonte, Maria João; Morais, H.; Vale, Zita; Ramos, CarlosThis paper presents an agent-based simulator designed for analyzing agent market strategies based on a complete understanding of buyer and seller behaviours, preference models and pricing algorithms, considering user risk preferences. The system includes agents that are capable of improving their performance with their own experience, by adapting to the market conditions. In the simulated market agents i...
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