ESTGV - DEE - Artigo em revista científica, indexada ao WoS/Scopus
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Browsing ESTGV - DEE - Artigo em revista científica, indexada ao WoS/Scopus by Subject "Adequacy"
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- Analysis of Transmission System Adequacy Considering the Constrained Fuzzy Power FlowPublication . Gouveia, Eduardo Miguel; Costa, Paulo Moisés; Sagredo, JesúsPower flow calculations are one of the most important tools for power system planning and operation. The need to account for uncertainties when performing power flow studies led, among others methods, to the development of the fuzzy power flow (FPF). This kind of models is especially interesting when a scarcity of information exists, which is a common situation in liberalized power systems (where generation and commercialization of electricity are market activities). In this framework, the symmetric/constrained fuzzy power flow (SFPF/CFPF) was proposed in order to avoid some of the problems of the original FPF model. The SFPF/CFPF models are suitable to quantify the adequacy of transmission network to satisfy “reasonable demands for the transmission of electricity” as defined, for instance, in the European Directive 2009/72/EC. In this work it is illustrated how the SFPF/CFPF may be used to evaluate the impact on the adequacy of a transmission system originated by specific investments on new network elements
- Constrained fuzzy power flow models with correlation between nodal injectionsPublication . Gouveia, Eduardo M.; Costa, Paulo MoisésThis paper extends the symmetric/constrained fuzzy powerflow models by including the potential correlations between nodal injections. Therefore, the extension of the model allows the specification of fuzzy generation and load values and of potential correlations between nodal injections. The enhanced version of the symmetric/constrained fuzzy powerflow model is applied to the 30-bus IEEE test system. The results prove the importance of the inclusion of data correlations in the analysis of transmission system adequacy.