Results 11 to 20 of about 435 (264)
Feasibility analysis of neutral grounding by small reactor of HVDC converter transformer
Energy Reports, 2022 Nowadays, the scale of power grid is remarkably increasing and there is a continuous reinforcement of AC–DC hybrid systems. Thus, the single-phase grounding fault currents on the AC grid-side of rectifier and inverter stations increase significantly ...
Ensheng Zhao +5 more
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The Earth systems and Earth science informatics [PDF]
Earth Science Informatics, 2008 Earth scientists collect, store, manage, process, and organize data about the different components of the Earth system, and about natural and simulated processes. The transition from data to information is achieved through computation, visualization, and other processes that make the data more meaningful to the scientists.
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The Lehtinen–Pirjola method modified for efficient modelling of geomagnetically induced currents in multiple voltage levels of a power network [PDF]
Annales Geophysicae, 2022 The need for accurate assessment of the geomagnetic hazard to power systems is driving a requirement to model geomagnetically induced currents (GIC) in multiple voltage levels of a power network.
R. J. Pirjola +4 more
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Nature, 2001 Imagine that we could let the world's economy continue to grow, bring the disadvantaged classes up from poverty and at the same time not threaten the atmosphere or global ecosystems with unprecedented build-up of greenhouse gases and the projected climatic risks of such growth.
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Effect of Impulse Polarity on a New Grounding Device with Spike Rods (GDSR)
Energies, 2020 The characterizations of grounding systems subjected to high impulse conditions are known to be dependent on the polarity, current to peak time and discharge time, as well as the electrical properties of the soil, and the grounding electrodes themselves.
Abdul Wali Abdul Ali +2 more
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Measurement + Control, 2017 This paper addresses accepted practice for the earthing of control systems in a variety of environments and is intended to give control and instrument technicians and engineers a basic understanding of the power supply earthing systems to which their ...
David W Otterson
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Earth Observing System AM1 mission to Earth [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 1998 In 1998, NASA launches EOS-AMI, the first of a series of the Earth Observing System (EOS) satellites. EOS will monitor the evolution of the state of the earth for 18 years, starting with the morning observations of EOS-AM1 (10:30 a.m. equatorial crossing time).
Kaufman, Yoram J. +5 more
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Energies, 2020 In a recently published work, the characteristics of a new grounding device with spike rods (GDSR) with various arrangements of ground electrodes under high magnitude impulse currents (up to 16 kA), was investigated.
Abdul Wali Abdul Ali +4 more
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Science, 2009 Burn, Baby, Burn Wildfires can have dramatic and devastating effects on landscapes and human structures and are important agents in environmental transformation. Their impacts on nonanthropocentric aspects of the environment, such as ecosystems, biodiversity, carbon reserves, and climate, are often overlooked.
Bowman, David M. J. S. +21 more
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New Method for Modelling Seasonal Variation in Resistance and Performance of Earthing Systems
Energies, 2023 The current techniques utilized for estimating seasonal fluctuations in earthing system resistance, including artificial neural networks (ANNs) and correlation/correction factors, rely on resistance records, soil resistivity measurements, and ...
Onyedikachi Samuel Nnamdi +1 more
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