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A closer look at lightning reveals needle-like structures
(Macmillan Publishers, 2019-04-17)
Article
Restricted access - publisher's policyStructural features have been identified on positively charged lightning channels that are not present on negatively charged ones. The discovery could explain why these two types of channel have different behaviours. -
Thunderstorm characteristics favouring downward and upward lightning to wind turbines
(2018-12-01)
Article
Restricted access - publisher's policyMeteorological conditions and thunderstorm characteristics related to lightning threats to wind turbines are discussed in this paper. Due to the rotating blades, wind turbines may be regarded peculiar tall objects, more ... -
Measuring urban energy sustainability and its application to two Spanish cities: Malaga and Barcelona
(Elsevier, 2019-02-01)
Article
Restricted access - publisher's policyThe aim of the paper is to propose a methodology for evaluating the energy sustainability of a city based on the characterization of the energy end-use, energy systems and flows, as well as other intrinsically related ... -
Voltage recovery influence on three-phase grid-connected inverters under voltage sags
(2019-02-12)
Article
Open Access -
Design methodology for a dc–dc power conversion system with EIS capability for battery packs
(2018-09-01)
Article
Restricted access - publisher's policyThis paper presents a design methodology for a dc-dc power conversion system (PCS) for battery packs. The methodology provides with an optimal design of the PCS and the associated inductive-capacitive filter interfacing ... -
Low-cost online contact resistance measurement of power connectors to ease predictive maintenance
(2019-03-12)
Article
Open AccessWith the increasing use of sensors and wireless communication systems, predictive maintenance is acquiring more and more importance to assess the condition of in-service equipment. Predictive maintenance presents promising ... -
Use of low smoke and halogen free cables for marine fire safety design
(2018-09-20)
Article
Open AccessSafety of shipping is a growing concern. The causes of shipping casualties are various. A fire on a ship is one of the most hazardous incidents which can happen on board and a common cause of damages and ... -
Lifetime, cost and fuel efficiency in diesel projects for rural electrification in Venezuela
(2018-10-01)
Article
Restricted access - publisher's policyFrom 2000–2016, 600 million people in developing countries accessed electricity through fossil-fuel-based technologies, both in isolated and grid-connected schemes. Although an increase in the use of renewable energy sources ... -
Identification of natural rubber samples for high-voltage insulation applications
(Pergamon Press, 2019-01-25)
Article
Restricted access - publisher's policy -
Real-time wireless, contactless and coreless monitoring of the current distribution in substation conductors for fault diagnosis
(2018-12-03)
Article
Restricted access - publisher's policyParallel conductors are found in electrical transmission and distribution systems including large ampacity feeders or loads. However, current unbalance often occurs, especially in alternating current systems. This non-regular ... -
OPEX of hybrid DC/AC power systems with large penetration of offshore wind taking into account spinning reserves
(2018-10-01)
Article
Restricted access - publisher's policyThis study presents a method to analyse the secure and optimal operation of transmission systems consisting of both HVDC (high-voltage direct current) and high-voltage alternating current interconnections under a scenario ... -
Complex-based controller for a three-phase inverter with an LCL filter connected to unbalanced grids
(Institute of Electrical and Electronics Engineers (IEEE), 2018-07-09)
Article
Open AccessA new controller for a grid connected inverter with an LCL filter is proposed in this paper. The system is described by its complex representation and the controller is designed using the complex root locus method. The ...
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