1,721,073 research outputs found
Dimensionamento della compensazione derivata nelle linee AAT “miste” cavo-aerea
No full textCapri (Italia),101° Convegno Nazionale AEIT
No-load energization of a 380 kV underground cable: temporary overvoltages
No full textDresda (Germania),EEUG - European EMTP-ATP Users Group Meeting 200
Temporary Overvoltages due to Harmonic Resonance in Long EHV Cables
No full textWith the increasing recourse to cables in EHV networks the likelihood of low-order harmonic resonance is becoming of even more concern. The scope of this paper is to analyze the overvoltages due to harmonic resonance at the no-load energization of a prospective 400kV-50Hz double circuit submarine cable line. ATP-EMTP analyses are carried out to predict the possibility of occurrence of low-order harmonic resonance; a phenomenon more liable to happen in case of EHV cables connected to low short circuit power networks.
The occurrence of resonances is sought for in the frequency domain and overvoltages are calculated in the time domain for the no-load energization of the EHV double circuit cable line. A sensitivity analysis is carried out varying the switching instants of line circuit breakers and the network short circuit power, while load and operating configurations are taken as a parameter. The effect of shunt reactor saturation voltage on the harmonic overvoltages is also investigated. Operational and design countermeasure are proposed
Short Circuit and induced voltage transient study on a planned 1000 MW HVDC-VSC cable link
No full textDelft (Olanda
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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