Results 11 to 20 of about 420,105 (198)
Overvoltage Simulation Analysis and Suppression of Breaking in a 35 kV Shunt Reactor
EnergiesWhen a 35 kV distribution network has the problem of insufficient reactive power, the input of a shunt reactor is a common compensation method. Vacuum circuit breakers are widely used in 35 kV distribution networks because of their superior arc ...
Jing Chen +4 more
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Overvoltage suppression method for DC microgrid under inter-pole short-circuit fault [PDF]
AIP AdvancesAiming at the problems that the existing methods do not fully consider the influence of fault states and have poor overvoltage suppression effects and irregular voltage waveforms, an overvoltage suppression method for DC microgrids under inter-electrode ...
Xiaobin Cai +3 more
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EnergiesDuring the asymmetric short-circuit period and the fault recovery stage of the renewable energy collection system, the non-fault phase and the PCC point show transient overvoltage characteristics, respectively, which threaten the safe and stable ...
Biyang Wang +4 more
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Novel method for restraining 35 kV shunt reactor switching overvoltage – phase controlled breaker
The Journal of Engineering, 2019 Phenomena such as current chopping, arc reignition and equivalent current chopping might appear when cutting off shunt reactor. Overvoltage caused by switching will lead to interphase fault in related equipment and inter-turn insulation damage in the ...
Yiming Zheng +5 more
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电力工程技术Line commutated converter based high voltage direct current (LCC-HVDC) is the key to large-scale grid connection and long-distance transmission of renewable energy. However, faults such as DC blocking and commutation failure may lead to short-term excess
SHANG Lei +5 more
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IEEE Open Journal of Power Electronics, 2023 This article proposes an improved overvoltage suppression method for the initial charge of the dc capacitor in voltage source power converters. The proposed method makes multiple short-circuits in each leg, utilizing power devices in the converter. These
Tomoyuki Mannen, Keiji Wada
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Study of Power Frequency Overvoltage Suppression on UHV Transmission Line
Kongzhi Yu Xinxi Jishu, 2014 It mainly studied the improvement measures of overvoltage level for UHV transmission line from Jindongnan to Jingmen. It analyzed single-phase grounding load shedding overvoltage and fault-free load shedding overvoltage in the case of the single ...
HAN Mengmeng +3 more
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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 +6 more
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Analysis of Gate Drivers for Overvoltage Suppression in Matrix Converters for Integrated Drives
Electrical, Control and Communication Engineering, 2009 This paper describes commutation overvoltage suppression methods by means of gate voltage and current control. Power IGBT gate drive circuits are compared in order to estimate the most compact and efficient topology in terms of gate charge and discharge ...
Alvis Sokolovs, Ilja Galkins
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Suppression of Generator-Side Transient Overvoltage in a DC 600 V Power Car System Based on AZSVPWM
EnergiesGenerator-side transient overvoltage may occur in DC 600 V AC–DC–AC railway power supply systems because switching-induced common-mode voltage generated by the front-end rectifier can propagate in reverse through cable distributed parameters, grounding ...
Fangdong Hou +4 more
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