Results 11 to 20 of about 471,713 (315)

Characteristics of the Partial Discharge in the Development of Conductive Particle-Initiated Flashover of a GIS Insulator

Energies, 2020
Conductive particles are one of the most important defects which can greatly degrade the performance of gas-insulated metal-enclosed switchgear (GIS). Many efforts have been made to clarify the influence on the withstand voltage, understand the flashover
Junping Zhao, Zhengjie An, Bin Lv, Zhicheng Wu, Qiaogen Zhang   +4 more
doaj   +1 more source

Design and short‐circuit current breaking test verification of a 72.5 kV single‐break fast vacuum circuit breaker

IET Generation, Transmission & Distribution, 2022
Fast clearing of a short‐circuit fault is vital to increase the transmission capacity of power grid transmission lines and improve the transient stability of a power system.
Chen Guan, Xiaofei Yao, Xinggui Chen, Luyang Zhang, Ran Zhang, Zhiyuan Liu, Jianhua Wang, Yingsan Geng, Hui Ma   +8 more
doaj   +1 more source

Spin-Hall Insulator [PDF]

Physical Review Letters, 2004
Recent theories predict dissipationless spin current induced by an electric field in doped semiconductors. Nevertheless, the charge current is still dissipative in these systems. In this work, we theoretically predict the dissipationless spin Hall effect, without any accompanying charge current, in some classes of band insulators, including zero-gap ...
Murakami, Shuichi, Nagaosa, Naoto, Zhang, Shou-Cheng   +2 more
openaire   +3 more sources

Polypropylene nanocomposite for power equipment: a review

IET Nanodielectrics, 2018
Polypropylene (PP), with high breakdown strength, low dissipation and good processibility, is one of the most widely used dielectric material for power equipment, especially in power capacitors and power cables.
Lu Cheng, Xiaohong Chi, Chenyu Yan, Dongri Xie, Xiaowei Liu, Yinian Wen, Wenfeng Liu, Shengtao Li   +7 more
doaj   +1 more source

Capacitive making of double‐break vacuum circuit breaker: Transverse magnetic field contacts are superior to axial magnetic field contacts

IET Generation, Transmission & Distribution, 2022
Previous studies mainly focused on the behaviours of single‐break vacuum circuit breakers (VCBs) in switching capacitor banks. The prestrike characteristics of double‐break VCBs subjected to axial magnetic fields (AMFs) and transverse magnetic fields ...
Yun Geng, Xinggui Chen, Luyang Zhang, Xiaofei Yao, Jing Peng, Yingsan Geng, Zhiyuan Liu   +6 more
doaj   +1 more source

Study on high-temperature and high-voltage insulation characteristics of polypropylene blend with highly packed elastomeric domains for power cable applications

Polymer Testing, 2023
In this paper, we report the high-temperature and high-voltage (HV) insulation characteristics of the polypropylene (PP) blend with highly packed elastomeric domains that showed excellent mechanical toughness in our previous study to find its suitability
Do-Kyun Kim, Seong Hwan Lee, Tae Hoon Kwon, Ik-Su Kwon, Dong Hee Han, Hoyyul Park, Se Won Han, Dae Ho Lee, Seunggun Yu   +8 more
doaj   +1 more source

Reinforcement influence on non-autoclave foam cement concrete strength characteristics/Armavimo įtaka putų cementbetonio stiprumo charakteristikoms

Journal of Civil Engineering and Management, 2000
The volume and surface reinforcement treatment influence on 900–1000 kg/m3 density non-autoclave foam cement concrete strength characteristics are discussed in this paper. Carbon fibres of a length up to 5 mm and diameter of 4, 6-7.7 mkm were used for
Marijonas Sinica, Antanas Dudik, Alexander Laukaitis, Georgij Sezeman   +3 more
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Fractional Topological Insulators [PDF]

Physical Review Letters, 2009
We analyze generalizations of two dimensional topological insulators which can be realized in interacting, time reversal invariant electron systems. These states, which we call fractional topological insulators, contain excitations with fractional charge and statistics in addition to protected edge modes.
Levin, Michael, Stern, Ady
openaire   +3 more sources

A full sequence impedance modelling and stability analysis of the virtual synchronous generator with inner loops

IET Renewable Power Generation, 2021
Virtual synchronous generator (VSG) has been widely studied owing to its inertia support to the grid. However, the stability of VSG is not analysed accurately for actual applications in previous studies that overlook voltage and current inner loops of ...
Yang Peng, Yue Wang, Yonghui Liu, Peng Yu, Sirui Shu, Wanjun Lei   +5 more
doaj   +1 more source

Study on overvoltage characteristics and arrester configuration strategy for ±1 100 kV HVDC transmission lines

The Journal of Engineering, 2018
Overvoltage caused by faults or switching is one of the decisive factors affecting the insulation level of equipment in UHVDC transmission systems.
Xiaoguang Zhu, Yichen Liu, Junbo Deng, Fang Yu, Jiangtao Li, Jie Guo, Guanjun Zhang   +6 more
doaj   +1 more source