Results 11 to 20 of about 703 (139)
High VoltageThe submodule in multilevel modular converters experiences a very fast transient overvoltage (VFTO) during switch operation of gas‐insulated switchgear, which also results in overvoltage on power devices, such as thyristors and insulated gate bipolar ...
Hong Shen +7 more
doaj +2 more sources
Leaching Kinetics of Zinc from Metal Oxide Varistors (MOVs) with Sulfuric Acid [PDF]
Metals, 2016 The leaching kinetics of zinc from zinc oxide-based metal oxide varistors (MOVs) was investigated in H2SO4 at atmospheric pressure. Kinetics experiments were carried out at various agitation speeds, particle sizes, initial H2SO4 concentrations, and reaction temperatures.
Youngjin Kim, Jaeryeong Lee
openaire +2 more sources
Journal of Modern Power Systems and Clean Energy, 2021 The nonlinear operation of metal oxide varistor (MOV)-protected series compensator in transmission lines introduces complications into fault detection approaches.
Mohammed Hussien Hassan Musa +3 more
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Investigation of Limitations in Passive Voltage Clamping-Based Solid-State DC Circuit Breakers
IEEE Open Journal of Power Electronics, 2022 This paper investigates limitations of passive voltage clamping based dc solid-state circuit breakers (SSCBs). There are two major contributions of this paper.
Shuyan Zhao +4 more
doaj +1 more source
High Voltage, Volume 8, Issue 6, Page 1275-1284, December 2023., 2023 Abstract With the development of a distributed generation, direct current (DC) load and energy‐storage equipment, voltage‐source‐converter‐based medium‐voltage DC systems (VSC‐MVDC) have attracted more attention due to its low power consumption, high reliability, independent power control and so on.
Muhammad Junaid +6 more
wiley +1 more source
Varistor coupling method and recommendation parameters for combination wave test
IET Science, Measurement &Technology, Volume 17, Issue 7, Page 277-286, September 2023., 2023 Low‐voltage varistors are adopted here in the OrCAD/PSpice environment to analyze the influence of varistor coupling on the output characteristic of the combination wave generator (CWG). Experiments have also been conducted here, and our simulation results are found to match the experimental ones well.
Mi Zhou +6 more
wiley +1 more source
A supercapacitor based enhancement technique for stand-alone surge protection circuits [PDF]
, 2013 With the International Technology Roadmap for Semiconductors predicting below-25nm feature-size VLSIs, powered by DC power supplies of less than 1V, protection against transients has become mandatory for modern electronic systems.
Fernando, Jayathu, Kularatna, Nihal
core +2 more sources
A three‐stage switching MMC topology for capacitor voltage ripple reduction in HVDC applications
IET Generation, Transmission &Distribution, Volume 17, Issue 13, Page 2953-2962, July 2023., 2023 Here, the three‐stage switching MMC (TSS‐MMC) topology is proposed, which can greatly reduce the capacitor voltage ripple of sub modules (SMs) by dynamically adjusting the position of inductance on the upper and down bridge arms. The effectiveness and engineering practicability of the proposed TSS‐MMC is verified by transient simulation program built ...
Qiang Fan +4 more
wiley +1 more source
Προστασία επαφών ηλεκτρονόμου με varistor [PDF]
, 2016 Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία.
Mavrakis, Vasileios +1 more
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Influence of UHV GIL access on transient recovery voltage of circuit breaker
电力工程技术, 2022 The access of ultra high voltage (UHV) gas-insulated transmission line (GIL) affects both the transient recovery voltage (TRV) amplitude and the rate of rise of TRV (RRRV) of circuit breakers,which may endanger the breaking capacity of circuit breakers ...
SUN Yi +5 more
doaj +1 more source