Results 71 to 80 of about 5,995,861 (234)
Gong-kuang zidonghua, 2012 For problem of ineffectiveness of traditional line selection methods by use of single feature value caused by complex and random fault borderline, small steady component of fault and reverse phase of instantaneous zero-sequence power when single-phase ...
TIAN Shu, HE Jin-peng, NIE He
doaj
Sequence of Exact Zero-Divisors
, 2011 18 pages, with some ...
Dibaei, Mohammad T., Gheibi, Mohsen
openaire +2 more sources
International Journal of Electrical Power & Energy SystemsThe network-level characteristics of zero-sequence currents during single-phase ground faults in existing low-resistance grounding systems with inverter-interfaced distributed generators (IIDGs) remain unclear. Moreover, the influence of IIDG integration
Jianwen Zhao, Fuyang Zeng
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A Novel Zero-Sequence Current Elimination PWM Scheme for an Open-Winding PMSM With Common DC Bus
IEEE transactions on power electronics, 2019 This paper introduces a novel pulsewidth modulation (PWM) scheme for an open-winding permanent magnet synchronous machine (OW-PMSM) driven by dual two-level three-phase inverter with common dc bus, which can effectively deal with the inherent zero ...
Zewei Shen +6 more
semanticscholar +1 more source
IEEE transactions on industry applications, 2020 This article presents an optimal carrier-based voltage balancing scheme for three-phase three-level converters. The proposed scheme utilizes two available degrees of freedom, i.e., zero-sequence signal injection and virtual zero-level modulation (VZM ...
Jun Wang +3 more
semanticscholar +1 more source
Long $n$-zero-free sequences in finite cyclic groups
, 2006 A sequence in the additive group ${\mathbb Z}_n$ of integers modulo $n$ is called $n$-zero-free if it does not contain subsequences with length $n$ and sum zero.
Chen, Fang, Savchev, Svetoslav
core +2 more sources
Induction Motor Fault Diagnosis Based on Zero-Sequence Current Analysis
Energies, 2020 This paper presents some considerations regarding the application of the stator zero-sequence current component (ZSC) in the fault detection of cage induction machines, including the effects of magnetic core saturation.
Arkadiusz Duda, P. Drozdowski
semanticscholar +1 more source
Weakly increasing zero-diminishing sequences
, 1996 The following problem, suggested by Laguerre's Theorem (1884), remains open: Characterize all real sequences \(\{\mu_k\}_{k=0}^\infty\) which have the zero-diminishing property; that is, if \(p(x)=\sum_{k=0}^n a_k x^k\) is any real polynomial, then \(\sum_{k=0}^n \mu_k a_k x^k\) has no more real zeros than \(p(x)\). In this paper this problem is solved
Bakan, Andrew +3 more
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IEEE Access, 2020 Aiming at the issue of zero-sequence current (ZSC) in the dual-inverter fed open-end winding transformer (OEWT-DI) based photovoltaic (PV) grid-tied system with common DC bus, a carrier-based pulse width modulation (CBPWM) strategy with steerable zero ...
Baoji Wang, Xing Zhang, Renxian Cao
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Zhejiang dianliTo address the poor tolerance to transitional resistance and incomplete utilization of fault information in grounding protection for flexible grounding systems， a fault line selection method based on current phase variation is proposed.
LI Zong +5 more
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