Results 21 to 30 of about 5,995,861 (234)
Electrical engineering & Electromechanics, 2017 Purpose. Information technologies allow multidimensional analysis of information about the state of the power system in a single information space in terms of providing network-centric approach to control and use of unmanned aerial vehicles as tools for ...
Ye. I. Sokol +5 more
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Energies, 2021 We developed an International Electrotechnical Commission (IEC) 61850-based centralized protection scheme to prevent single line-to-ground (SLG) faults in the feeders and busbars of ungrounded distribution systems.
Soon-Ryul Nam +4 more
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The spectral gap of graphs and Steklov eigenvalues on surfaces [PDF]
, 2013 Using expander graphs, we construct a sequence of smooth compact surfaces with boundary of perimeter N, and with the first non-zero Steklov eigenvalue uniformly bounded away from zero. This answers a question which was raised in [9].
Colbois, Bruno, Girouard, Alexandre
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Вестник Северо-Кавказского федерального университета, 2022 The article presents a technique for assessment the level of consumers’ impact on the voltage asymmetry by the zero sequence at the point of common connection. The results of a computational experiment that determine the possibility of using the level of
Dmitrii Kostyukov
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On Sequences Without Short Zero-Sum Subsequences
The Electronic Journal of Combinatorics, 2023 Let $G$ be a finite abelian group. It is well known that every sequence $S$ over $G$ of length at least $|G|$ contains a zero-sum subsequence of length at most $\mathsf{h}(S)$, where $\mathsf{h}(S)$ is the maximal multiplicity of elements occurring in $S$.
Zeng, Xiangneng, Yuan, Pingzhi
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Zeros of linear recurrence sequences [PDF]
manuscripta mathematica, 1999 Let \(f(x)= P_0(x) \alpha_0^x+\cdots+ P_k(x) \alpha_k^x\) be an exponential polynomial over a field \(\mathbb{K}\) of zero characteristic. For \(i=0,\dots, k\), \(0\neq P_i\in \mathbb{K}[x]\) and \(0\neq \alpha_i\in \mathbb{K}\) such that for each pair \((i,j)\) with \(i\neq j\), \(\alpha_i/ \alpha_j\) is not a root of unity.
Schlickewei, Hans Peter +2 more
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Energies, 2020 Through the analysis of the recovery inrush current generated by the external fault removal of the converter transformer, it is pointed out that the zero-sequence current caused by the recovery inrush may result in the saturation of the neutral current ...
Tao Zheng +4 more
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Control Strategies for Open-End Winding Drives Operating in the Flux-Weakening Region [PDF]
, 2013 This paper presents and compares control strategies for three-phase open-end winding drives operating in the flux-weakening region. A six-leg inverter with a single dc-link is associated with the machine in order to use a single energy source.
BRUYERE, Antoine +4 more
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Design of a mine-used low-voltage leakage protection device
Gong-kuang zidonghua, 2020 In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was ...
ZHENG Qingle +3 more
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Applied Sciences, 2020 In microgrids, paralleled converters can increase the system capacity and conversion efficiency but also generate zero-sequence circulating current, which will distort the AC-side current and increase power losses.
Zhao Han +3 more
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