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Selection of portfolios of electricity generation projects : an exploratory study
Matos, Eduardo; Ferreira, Paula Varandas; Cunha, JorgeThe electricity planning traditionally relies on optimization models with the objective of minimizing system costs. However, the liberalization trend of the market and development of renewable energy increased the complexity of this planning exercise. It becomes then necessary to study other methodologies in order to include in the planning process the risk variables and potential correlation between technologi...
A modified-MVA approach for sustainable electricity planning : the case of Port...
Cunha, Jorge; Ferreira, Paula VarandasThe use of the mean-variance approach (MVA) is well demonstrated in the financial literature for the optimal design of financial assets portfolios. The electricity sector portfolios are also guided by similar objectives, namely maximizing return and minimizing risk. Based on this assumption, this paper proposes a possible MVA for the definition of optimal electricity portfolios relying on renewable energy sourc...
Evaluating future scenarios for the power generation sector using a Multi-Crite...
Ribeiro, Fernando; Ferreira, Paula Varandas; Araújo, Maria Madalena Teixeira deA Multi-Criteria Decision Analysis (MCDA) tool was designed and used to support the evaluation of different electricity production scenarios. The MCDA tool is implemented in a user-friendly Excel worksheet and uses information obtained from a mixed integer optimization model, to produce a set of optimal schemes under different assumptions. Given the input, the MCDA allowed ranking different scenarios relying on...
Strategic impact management of wind power projects
Lima, Fátima; Ferreira, Paula Varandas; Vieira, Filipa DionísioWind power projects, despite comparatively to conventional energy sources being considered cleaner alternatives, are not devoid of side effects requiring accurate assessment in order to attain a sustainably managed process. This paper presents a detailed overview of the most pertinent environmental and human effects of wind farms, encompassing Landscape and visual effect; Shadow flicker effect; Electromagnetic ...
Wind energy and local community perceptions
Lima, Fátima; Ferreira, Paula Varandas; Vieira, Filipa DionísioPortugal has seen in recent years an increased growth of wind farm’s deployment in its northern region, in accordance with national legal framework and current energy policies. The majority of existing academic studies focusing on impacts (benefits or costs) resulting from deployment of this technology, mainly addressee these aspects from a global point of view. Notwithstanding wind power projects have also bee...
Public opinion on renewable energy technologies : the Portuguese case
Ribeiro, Fernando; Ferreira, Paula Varandas; Araújo, Maria Madalena Teixeira de; Braga, A. C.Renewable energy technologies are part of the solution to meet future increasing demand of electricity and decommissioning of power plants in the European Union. Public opinion surveys indicate general support of these technologies, but particular projects face local opposition, a phenomenon known in the literature as the NIMBY (Not In My BackYard) hypothesis. In this study, the public opinion on renewable ener...
Renewable energy scenarios in the portuguese electricity system
Fernandes, Liliana; Ferreira, Paula VarandasPortugal has been demonstrating over the years a high dependence of imported fossil fuels, especially with regard to the transportation and electricity production sectors. The urgent need to balance supply and demand as well as the growing concern about environmental issues and reduction of external energy dependency justified an increasing interest in the exploitation of renewable energy sources (RES) looking ...
Electricity cost optimization in a renewable energy
Pereira, Sérgio; Ferreira, Paula Varandas; Vaz, A. Ismael F.The variable electricity output of the renewable energy sources (RES) power plants, such as wind and hydro power technologies, is seen as an important challenge for the electricity system managers. This paper addresses the problem of an electricity system supported mainly on hydro, thermal and wind power plants, presenting a short-term model planning. A binary mixed integer non-linear optimization model for one...
The cost and emission saving potential of wind power
Ferreira, Paula VarandasThis paper addresses the effect of the increasing wind penetration on the operating performance of a diversified electricity system comprising wind, thermal, hydro and other renewable power plants. A short term optimization model is used to run the exploration planning under different wind power scenarios. The seasonality of the hydro and wind regimes and the hourly variations of supply and demand are acknowled...
Conceptualizing a credits trading approach towards corporate social responsibil...
Hede, Shantesh; Ferreira, Paula Varandas; Nunes, Manuel L.; Rocha, Luís A.Life Cycles of both products and services significantly consume renewable and non-renewable resources across a worldwide scale. Thus, eliciting an enormous environmental impact, that is known to disproportionately instigate crises into the socio-economic and political domains of our civilization. Therefore, Creation of Shared Value and Corporate Social Responsibility (CSR) have been considered by Policy makers,...
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