Results 21 to 30 of about 790,941 (303)
High Voltage, 2023 Incorporating positive temperature coefficient (PTC) ceramic particles into polymers provides a prospective alternative solution for suppressing severe electric field distortions caused by negative temperature coefficient (NTC) of electrical resistivity ...
Guimin Jiang +6 more
doaj +1 more source
WIND-GENERATED LONGSHORE CURRENTS
Coastal Engineering Proceedings, 1978 This paper evaluates, through the use of a stepwise multiple regression procedure, whether parameters descriptive of the surf-zone wave field adequately explain the variability in longshore current velocities, or if the inclusion of additional physical environmental parameters could significantly improve the ability to predict such currents.
Dag Nummedal, Robert J. Finley
openaire +2 more sources
Energy Reports, 2022 Nano dielectrics have brought hope for solving the problem of cable insulation at high voltage levels. In this paper, nano Al2O3 and MgO are doped to silicone rubber and the nanocomposites are aged at 200 °C for 0-80 days. The electrical conductivity and
Yunxiao Zhang +3 more
doaj +1 more source
What to expect from a greater geographic dispersion of wind farms? - A risk portfolio approach [PDF]
, 2007 The UK, like many other industrialised countries, is committed to reducing greenhouse gas emissions under the Kyoto Protocol. To achieve this goal the UK is increasingly turning towards wind power as a source of emissions free energy.
Ben Drake +9 more
core +1 more source
A low leakage current (Co, Mn, Ta)-SnO2 varistor tailored by doping with chromium for power grids
Results in Physics, 2020 A SnO2 varistor which was prospected to be used in ultra-high voltages grids as an overvoltage protection element was developed. The SnO2 varistor was doped with Cr to improve the comprehensive electrical properties. The optimal electrical parameters are
Hongfeng Zhao +4 more
doaj +1 more source
No-load cutting-in control of the doubly fed induction generator based on grey prediction PI control
Energy Reports, 2021 The traditional method of stator flux oriented PI control of the doubly fed induction wind generator (DFIG) no-load cutting-in is easy to implement under ideal conditions, but in the actual project with high frequency of wind speed change, the feedback ...
Ping Jiang, Yanjun Xing, Peiguang Wang
doaj +1 more source
Benefits of spatio-temporal modelling for short term wind power forecasting at both individual and aggregated levels [PDF]
, 2017 The share of wind energy in total installed power capacity has grown rapidly in recent years around the world. Producing accurate and reliable forecasts of wind power production, together with a quantification of the uncertainty, is essential to ...
Ackermann +43 more
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Contracting for Wind Generation [PDF]
Economics of Energy & Environmental Policy, 2012 The UK Government proposes offering long-term Feed-in-Tariffs (FiTs) to low-carbon generation to reduce risk and encourage new entrants. Their preference is for a Contract-for-Difference (CfD) or a premium FiT (pFiT) for all generation regardless of type. I argue that neither is suitable for on-shore wind, where a fixed FiT appears less risky.
openaire +2 more sources
Probabilistic evaluation of renewable energy curtailment under forward electricity market [PDF]
E3S Web of Conferences, 2020 Forward electricity market has emerged as a pivotal section for the electricity transaction to keep stakeholders away from price risk and electricity shortage.
Jiang Jiheng +6 more
doaj +1 more source
Combining hydro-generation and wind energy biddings and operation on electricity spot markets [PDF]
, 2006 Wind generation is growing rapidly in all the world, especially in Europe. The power produced by this kind of generation is difficult to predict and the predictions are not very accurate. In most systems these imbalances are costly.
Angarita Márquez, Jorge Luis +1 more
core +3 more sources