2019
Autores
Sheikh, M; Aghaei, J; Nikoobakht, A; Osório, GJ; khah, MS; Lotfi, M; Catalão, JPS;
Publicação
Conference on Next Generation Computing Applications, NextComp 2019, Mauritius, September 19-21, 2019
Abstract
In order to decrease operation costs in a security constrained unit commitment (SCUC) problem, strategies such as transmission switching (TS) can be utilized. However, having no limit for the switching of circuit breakers (CBs) in the system is troublesome, since a high number of switching increases the failure probability and decreases the reliability of a CB, in addition to resulting in shorter CB lifespans and higher maintenance and operating costs. In this paper, the reliability of CBs is integrated into the SCUC problem with TS to limit its switching. Since the higher reliability of CBs will increase the reliability of the system, it can be inferred that the reliability of CBs will affect the amount of load shedding. A linearization method is presented to linearize the CB reliability equation. Also, an improved linear AC optimal power flow (ILACOPF) with dynamic thermal line rating (DTLR) which considers weather conditions is used in the model to further reduce the number of switching. In order to evaluate the suggested approach, numerical testing is performed for 6-bus and large-scale 118-bus IEEE test systems with different scenarios. © 2019 IEEE.
2019
Autores
Pessoa L.M.; Duarte C.; Salgado H.M.; Correia V.; Ferreira B.; Cruz N.A.; Matos A.;
Publicação
OCEANS 2019 - Marseille, OCEANS Marseille 2019
Abstract
In this paper we evaluate the long-term deployment feasibility of a large-scale network of abandoned underwater sensors, where power is provided by autonomous underwater vehicles (AUVs) in periodic visits.
2019
Autores
Martins, CA; Vaz, CB; Alves, JMA;
Publicação
VISION 2025: EDUCATION EXCELLENCE AND MANAGEMENT OF INNOVATIONS THROUGH SUSTAINABLE ECONOMIC COMPETITIVE ADVANTAGE
Abstract
The Hospitality industry is one of the main sectors of tourism activity, being important to assess the performance of the hotel companies. The aim of the present paper is to study the financial performance of 570 companies operating hotel units in Portugal, in 2017, allowing for comparison among companies with similar stars rating and market orientation to explore the question of branded and non-branded affiliation. This issue is studied using a methodology based on Data Envelopment Analysis to assess the overall performance for each company. The hotel company performance is assessed through the aggregation of multiple financial indicators using the composite indicator derived from the DEA model. The empirical results show that the hotel branded companies have, on average, significantly, higher overall financial performance than hotel non-branded companies. Although, the best practices are observed in hotel branded and non-branded companies. This analysis can support the strategic decision process of the hotel companies in choosing to operate independently or selecting a brand affiliation.
2019
Autores
Furtado, JV; Pereira, AR; Pereira, I; Moreira, AC;
Publicação
Handbook of Research on Entrepreneurship, Innovation, and Internationalization - Advances in Business Strategy and Competitive Advantage
Abstract
2019
Autores
Martins, TC; Gomes de Azevedo Pinto, MM;
Publicação
Políticas Culturais em Revista
Abstract
2019
Autores
Erdinc, O; Tascikaraoglu, A; Paterakis, NG; Catalao, JPS;
Publicação
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Abstract
In this paper, a novel direct load control (DLC) planning based on providing free energy credits to residential end-users for their heating, ventilation, and air conditioning load during demand response (DR) events is proposed. The obtained credit can then be used by the end-users during relatively higher price periods free-of-cost to enable them lowering their energy procurement costs. Furthermore, the resulting reduction in the total household energy consumption considerably decreases the critical load demands in power systems, which is of vital importance for load-serving entities in maintaining the balance between supply and demand during peak load periods. In this regard, the aforementioned energy credits-based incentive mechanism is proposed for end-users enrolled in the DLC-based DR program, as a new contribution to the existing literature, testing it in a stochastic day-ahead planning context.
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