Browsing by Author "Pereira, Agostinho Filipe da Rocha"
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- On the Dynamics of Generating Electricity from Diversified Sources: Evidence from PortugalPublication . Marques, António Cardoso; Fuinhas, José Alberto; Pereira, Agostinho Filipe da RochaBy studying the interaction among wind power, traditional sources including largehydro (ordinary regime), electricity consumption and electricity exports, the dynamics of generating electricity from diversified sources is the focus of this paper. Data for Portugal with daily frequency, for the time span from July 2007 until December 2012, are used. On the whole, the results confirm that the variables interact with each other (endogeneity). Wind power drives its own path, which is largely the outcome of political decisions. The analysis also suggests that the impact on economic activity is greater from the ordinary regime than from wind power.
- Wind power energy and electricity exports: empirical evidence from PortugalPublication . Pereira, Agostinho Filipe da Rocha; Marques, António Manuel Cardoso; Fuinhas, José Alberto Serra Ferreira RodriguesThe increasing integration of electricity generated from renewable sources in the national electricity generating systems are posing new challenges to these systems management. In particular, in off-peak hours, the system management must ensure a suitable destination to any exceeding electricity created. One solution to deal with this problem is to export. Portugal has belonged to the leading group of countries where renewable sources grew most. Therefore its being studied for this country, the relationship between wind power electricity and the electricity exports for the period July 2007 to 2012, on a daily basis. Given the strong endogeneity between wind sources, exports, and the electricity generated in the ordinary regime, the methodology Vector Autoregressive (VAR) is used. This option also allows to evaluate the nature of the relationships without the prior need to distinguish endogenous from exogenous variables. The results show that causalities exist between the variables, that is, they interact with each other. In addition, there is a bidirectional causal relationship between consumption and production of wind energy and between the proxy electricity export and consumption. This study shows that there is endogeneity between variables and a positive correlation between exports electricity and wind energy production in Portugal. These results will help policy makers to take balanced positions within the power system.