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IEEE Transactions on Power Delivery, 2021
This paper proposes a new method to select single-line-to-ground (SLG) fault feeder in resonant grounding power distribution system based on compensation characteristic of extinction coil in different frequencies. The proposed method is insusceptible to the influence of device polarity reverse installation.
Penghui Liu +5 more
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This paper proposes a new method to select single-line-to-ground (SLG) fault feeder in resonant grounding power distribution system based on compensation characteristic of extinction coil in different frequencies. The proposed method is insusceptible to the influence of device polarity reverse installation.
Penghui Liu +5 more
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Power system resonance excited by VFD ground fault
2009 IEEE International Electric Machines and Drives Conference, 2009This paper investigates the resonance phenomenon produced by a voltage source PWM variable frequency drive (VFD) on an ungrounded delta system. Many drives are installed on ungrounded delta systems without isolation transformers or other means to provide inverter ground reference.
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Resonance Analysis of Small Current Grounding System in Distribution Network
2018 China International Conference on Electricity Distribution (CICED), 2018At present, there are a large number of arc suppression coil grounding mode in the low-voltage distribution network for the equipment insulation and power supply reliability considerations. The role of arc suppression coil grounding mode is when the grid single-phase ground fault occurs, arc suppression coil will provide inductor current to compensate ...
Zhou Desheng +5 more
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Systems with resonating-valence-bond ground states: Correlations and excitations
Physical Review B, 1988We consider a resonating-valence-bond state as a variational estimate for the ground state of a Heisenberg antiferromagnet. We derive an expression for the normalization of this wave function, which is a superposition of a very large number of singlet pair states, which we then use to show that the singularities, correlations, and low-lying excitations
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Magnetic Resonance Imaging, 2023
Accurately targeting specific regions of interest in the brain is pivotal for the success of neurosurgical procedures. For example, the outcome of brain tumor resection is improved dramatically when surgeons are better able to define surgical borders. Intraoperative magnetic resonance imaging (iMRI) helps reduce the risk of damaging critical areas of ...
Michael L, Lang +9 more
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Accurately targeting specific regions of interest in the brain is pivotal for the success of neurosurgical procedures. For example, the outcome of brain tumor resection is improved dramatically when surgeons are better able to define surgical borders. Intraoperative magnetic resonance imaging (iMRI) helps reduce the risk of damaging critical areas of ...
Michael L, Lang +9 more
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A novel fault line selection method of resonant grounding system
2017 IEEE Conference on Energy Internet and Energy System Integration (EI2), 2017In order to solve the problems of fault line selection in resonant grounding system, a novel fault line selection method for distribution network was proposed in this paper. First, continuously measure three-phase voltage and zero-sequence voltage, which detects single-phase ground fault.
Yongjun Yuan +5 more
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Fault Line Selection in Resonant Grounded System Based on IMEn
Advanced Materials Research, 2014When the single phase ground fault occurs in resonant grounded system, there are significant differences in the components of fault phase current between fault line and non-fault line. This feature can be reflected by intrinsic mode entropy (IMEn) of fault current. IMEn is a new signal analysis over multiple oscillation levels.
Meng Zhang, Jian Wen Ren
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Experience with Resonant Grounding in a Large 34.5-kY System
IEEE Transactions on Power Apparatus and Systems, 1966Since early 1946, when grounding of the 34.5-kV system of the Wisconsin Michigan Power Company was established through installation of a Peterson coil, very complete records have been maintained with regard to all ground faults on the system. The results of an analysis of these records, covering 19 years of operation with resonant grounding, are ...
H. Brown, E. B. Gross
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Ground State Solutions for Resonant Cooperative Elliptic Systems with General Superlinear Terms
Mediterranean Journal of Mathematics, 2015zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shi, Hongxia, Chen, Haibo
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IEEE Transactions on Power Delivery, 2017
High-impedance faults (HIF) occur frequently in resonant grounding systems and are difficult to detect. Thus, an effective HIF feeder identification technology is urgently needed. This paper establishes an HIF equivalent circuit in a resonant grounding system.
Yongduan Xue +3 more
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High-impedance faults (HIF) occur frequently in resonant grounding systems and are difficult to detect. Thus, an effective HIF feeder identification technology is urgently needed. This paper establishes an HIF equivalent circuit in a resonant grounding system.
Yongduan Xue +3 more
openaire +1 more source