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Publications

Publications by CPES

2013

Advanced models and simulation tools to address electric vehicle power system integration (steady-state and dynamic behavior)

Authors
Soares, FJ; Almeida, PMR; Lopes, JAP;

Publication
Electric Vehicle Integration into Modern Power Networks

Abstract

2013

Evaluation of the benefits of the introduction of electricity powered vehicles in an island

Authors
Baptista, PC; Silva, CM; Pecas Lopes, JAP; Soares, FJ; Almeida, PR;

Publication
ENERGY CONVERSION AND MANAGEMENT

Abstract
This paper evaluates the benefits of introducing electricity powered vehicles (EV) in one island of the Azores archipelago in Portugal, the island of Flores. A Life Cycle Analysis (LCA) for the road transportation sector including EV was performed and the EV impacts in the electricity grid were evaluated. Two scenarios considering the introduction of EV were considered (Scenarios 2 and 3 with a shift in the car stock in 2050 of 30% and 70% to EV) and compared to the baseline scenario (Scenario 1 with no EV penetration). The results show that, if no alternative solutions are adopted, the road transportation sector LCA energy consumption will increase 58% in 2050, compared to 2009. In the most attractive scenario studied regarding EV integration in Flores, the LCA energy consumption in 2050 decreases by 34% and CO2 emissions by 39%, when comparing with Scenario 1. Moreover, the island's electricity network is ready for EV arrival, at least until 2020. Thereafter, a smart charging scheme should be implemented to manage the vehicles' energy demand according to the network technical limitations and the presence of Renewable Energy Sources (RES) should be reinforced, to decrease the island's dependency on fossil fuels and, consequently, CO2 emissions.

2013

Operation of multi-microgrids

Authors
Lopes, JAP; Madureira, A; Gil, N; Resende, F;

Publication
Microgrids: Architectures and Control

Abstract

2013

Characterisation of electrical energy storage technologies

Authors
Ferreira, HL; Garde, R; Fulli, G; Kling, W; Lopes, JP;

Publication
ENERGY

Abstract
In the current situation with the unprecedented deployment of clean technologies for electricity generation, it is natural to expect that storage will play an important role in electricity networks. This paper provides a qualitative methodology to select the appropriate technology or mix of technologies for different applications. The multiple comparisons according to different characteristics distinguish this paper from others about energy storage systems. Firstly, the different technologies available for energy storage, as discussed in the literature, are described and compared. The characteristics of the technologies are explained, including their current availability. In order to gain a better perspective, availability is cross-compared with maturity level. Moreover, information such as ratings, energy density, durability and costs is provided in table and graphic format for a straightforward comparison. Additionally, the different electric grid applications of energy storage technologies are described and categorised. For each of the categories, we describe the available technologies, both mature and potential. Finally, methods for connecting storage technologies are discussed.

2013

Electric vehicle integration into modern power networks

Authors
Garcia Valle, R; Lopes, JAP;

Publication
Electric Vehicle Integration into Modern Power Networks

Abstract
Electric Vehicle Integration into Modern Power Networks provides coverage of the challenges and opportunities posed by the progressive integration of electric drive vehicles. Starting with a thorough overview of the current electric vehicle and battery state-of-the-art, this work describes dynamic software tools to assess the impacts resulting from the electric vehicles deployment on the steady state and dynamic operation of electricity grids, identifies strategies to mitigate them and the possibility to support simultaneously large-scale integration of renewable energy sources. New business models and control management architectures, as well as the communication infrastructure required to integrate electric vehicles as active demand are presented. Finally, regulatory issues of integrating electric vehicles into modern power systems are addressed. Inspired by two courses held under the EES-UETP umbrella in 2010 and 2011, this contributed volume consists of nine chapters written by leading researchers and professionals from the industry as well as academia.

2013

Modeling the multiobjective optimization of electricity consumption for residential consumers

Authors
Bernal Agustin, JL; Cortes Arcos, T; Dufo Lopez, R; Lujano Rojas, JM; Monteiro, C;

Publication
Advanced Materials Research

Abstract
This paper presents a mathematical model to simultaneously optimize the cost of electricity and the satisfaction of a residential consumer using the communication infrastructure of a smart grid. For this task the concept of Pareto optimality has been used. It is possible to consider the satisfaction of the consumer as an independent objective to be maximized, and simultaneously, to minimize the cost of the electrical bill. In future works a multiobjective evolutionary algorithm will be applied along with the mathematical model presented in this paper. © (2013) Trans Tech Publications, Switzerland.

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