Results 21 to 30 of about 110,149 (199)

DC Microgrid Technology: System Architectures, AC Grid Interfaces, Grounding Schemes, Power Quality, Communication Networks, Applications, and Standardizations Aspects

open access: yesIEEE Access, 2017
To meet the fast-growing energy demand and, at the same time, tackle environmental concerns resulting from conventional energy sources, renewable energy sources are getting integrated in power networks to ensure reliable and affordable energy for the ...
Dinesh Kumar, Firuz Zare, Arindam Ghosh
doaj   +1 more source

Transformation of Transient Overvoltages by Inductive Voltage Transformers

open access: yesSensors, 2021
Overvoltage transients occur after any type of switching activity in a power network, such as breaker operation, fault occurrence/clearance and rapid load change. This distortion of voltage is transformed to the secondary circuit of a voltage transformer.
Michał Kaczmarek, Dariusz Brodecki
doaj   +1 more source

Harmonic Morphisms Projecting Harmonic Functions to Harmonic Functions [PDF]

open access: yesAbstract and Applied Analysis, 2012
For Riemannian manifolds M and N, admitting a submersion ϕ with compact fibres, we introduce the projection of a function via its decomposition into horizontal and vertical components. By comparing the Laplacians on M and N, we determine conditions under which a harmonic function on U = ϕ−1(V) ⊂ M projects down, via its horizontal component, to a ...
openaire   +4 more sources

Interaction among Multiple Electric Vehicle Chargers: Measurements on Harmonics and Power Quality Issues

open access: yesEnergies, 2023
The electric vehicle (EV) market is growing rapidly due to the necessity of shifting from fossil fuel-based mobility to a more sustainable one. Smart charging paradigms (such as vehicle-to-grid (V2G), vehicle-to-building (V2B), and vehicle-to-home (V2H))
Andrea Mazza   +7 more
doaj   +1 more source

Harmonic Index and Harmonic Polynomial on Graph Operations [PDF]

open access: yesSymmetry, 2018
Some years ago, the harmonic polynomial was introduced to study the harmonic topological index. Here, using this polynomial, we obtain several properties of the harmonic index of many classical symmetric operations of graphs: Cartesian product, corona product, join, Cartesian sum and lexicographic product.
Juan Carlos Hernández-Gómez   +3 more
openaire   +3 more sources

tsutterley/read-GRACE-harmonics: v1.0.2.7

open access: yes, 2022
Bug fixes and new features for running Versions 0 and 1 of RL06 feat: add program for overwriting the GRACE/GRACE-FO index feat: Dynamically select newest version of granules for index feat: add GSFC SLR 5x5 download function feat: add option to replace
Tyler Sutterley
core   +1 more source

Accurate and Fast Parallelized Assessment of Waveform Distortions in Presence of Low and High frequency Spectral Components

open access: yes, 2022
The waveforms distortion assessment nowadays requires great research efforts due to the contemporaneous presence of low- and high-frequency harmonics and interharmonics (up to 150 kHz). In this paper, a new multi-method approach allowed accurate and fast
Varilone P.   +5 more
core   +1 more source

The Approximation of Harmonic Functions by Harmonic Polynomials and by Harmonic Rational Functions [PDF]

open access: yesBulletin of the American Mathematical Society, 1929
which converges uniformly f or all values of 6. This is of course a general fact, tha t if a given function can be uniformly approximated as closely as desired by a linear combination of other functions, then that function can be expanded in a uniformly convergent series of which each term is a linear combination of those other functions, and ...
openaire   +3 more sources

Voltage harmonic reduction for randomly time-varying source characteristics and voltage harmonics [PDF]

open access: yes, 2006
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

tsutterley/model-harmonics: v1.1.0

open access: yes, 2023
Some major refactors in spherical harmonic dependencies Added new SMB programs and new capabilities feat: add GSFC GIA program (#35) feat: shift ERA P-E, MERRA-2 SMB and GLDAS TWS to mid-month values (#35) feat: add option --mask to GLDAS harmonics to ...
Tyler Sutterley
core   +1 more source

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