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Contactless capacitive (open-air) sensors are applied to monitor overvoltages near overhead line terminations at a substation or at the transition from underground cables to overhead lines. It is shown that these sensors, applied in a differentiating/int...
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Turan Cakil, Hamza Feza Carlak and Sukru Ozen
The impact of a lightning electromagnetic pulse (LEMP) on a power line or power station produces an effect similar to that of switching between a significant power source and a power line circuit. This switch closure causes a sudden change in routing con...
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Zhuofan Xu, Jing Yan, Guoqing Sui, Yanze Wu, Meirong Qi, Zilong Zhang, Yingsan Geng and Jianhua Wang
High-voltage circuit breakers (HVCBs) handle the important tasks of controlling and safeguarding electricity networks. In the case of insufficient data samples, improving the accuracy of the traditional HVCB mechanical fault diagnosis method is difficult...
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Igor Yudaev, Yuliia Daus, Vladimir Panchenko and Vadim Bolshev
Due to the emerging danger to the life of animals and people, today there is a turn to safe technologies for controlling weeds by physical methods, both from the point of view of ecology and food safety, which include the destruction of plants using an e...
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Van-Vinh Nguyen, Nhat-Tung Nguyen, Quang-Thuan Nguyen, Van-Hai Bui and Wencong Su
The primary function of hybrid direct current circuit breakers (HCBs) is to quickly interrupt fault currents to protect high-voltage direct current (HVDC) systems. To enhance the reliability and stability of HVDC systems, optimal design of HCBs is requir...
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Kihong Chun, Dongwoo Song and Kisung Kim
Most electrical transmission lines are located in forests, and currently in South Korea, deregulation has allowed various structures to be built on the ground below transmission lines. Events of fires occurring below high-voltage transmission lines can l...
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Luis Guillermo García Ordóñez, Maria Liz Crespo, Sergio Carrato, Andres Cicuttin, Werner Oswaldo Florian Samayoa, Daniele D?Ago and Stefano Levorato
Data logging and complex algorithm implementations acting on multichannel systems with independent devices require the use of time synchronization. In the case of Gas Electron Multipliers (GEM) and Thick-GEM (THGEM) detectors, the biasing potential can b...
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Tomasz Kossowski and Lukasz Matuszewski
This article presents the results of experimental tests of a measuring system dedicated to the study of lightning phenomena. A wireless non-real-time communication arrangement was used as a prototype to protect the system by overvoltage and electromagnet...
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San-Fu Wang, Hua-Pin Chen, Yitsen Ku and Yi-Fang Li
This paper proposes a high-input impedance voltage-mode (VM) multifunction biquad filter which employs three current-feedback amplifiers (CFAs), three resistors, and two grounded capacitors. The proposed VM multifunction biquad filter has single-input an...
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Jianmin Qiu, Ying Yang, Xin Hong, Piotr Vasiljev, Dalius Mazeika and Sergejus Borodinas
This paper presents a disc-type ultrasonic piezoelectric motor, which is designed for micro flying vehicles. It provides a high output rotation speed under low operating voltage, compared with common piezoelectric devices, by employing a ?contact teeth? ...
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Yanxiong Xiang, Lingling Huang and Changwei Zou
Cr?Si?N nanocomposite coatings were deposited by multi-arc ion plating under different bias voltages. The influences of bias voltage on composition, microstructure, surface morphology and mechanical properties of Cr?Si?N nanocomposite coatings were inves...
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Jerzy Skubis and Michal Koziol
In this article, the authors present the results of the analysis of the ionization efficiency of drill-type needle electrodes in air. The analysis was carried out on the basis of experimental laboratory measurements, examined at alternating voltages. Dri...
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Javed Ahmad, Mohammad Zaid, Adil Sarwar, Chang-Hua Lin, Shafiq Ahmad, Mohamed Sharaf, Mazen Zaindin and Muhammad Firdausi
In this paper, a new transformerless high voltage gain dc-dc converter is proposed for low and medium power application. The proposed converter has high quadratic gain and utilizes only two inductors to achieve this gain. It has two switches that are ope...
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Huatan Chen, Gaofeng Zheng, Juan Liu, Jiaxin Jiang, Guoyi Kang, Xiang Wang, Wenwang Li and Yifang Liu
The precise manufacturing of micro/nano structures is the key to the rapid development of flexible micro/nano systems. In this paper, a sinusoidal high-voltage alternating current (AC) power is designed for electrohydrodynamic direct-writing (EDW) techno...
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Francisco-Javier Moreno-Marimbaldo and Miguel-Ángel Manso-Callejo
Any artificial infrastructure built in a territory causes changes in its environment, especially when it is a question of large or extensive infrastructures such as high-voltage transmission lines (HVTLs). Such changes are perceived unevenly by the diffe...
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Aleksandr Vovchenko,Larysa Demydenko,Sergey Kozyrev
Pág. 29 - 38
Studying the high-voltage electrochemical explosion as a control object has established a significant impact exerted by the modes of controlled energy input into a discharge channel on the efficiency of exothermal energy conversion. Dependence has been d...
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Artur Rojek
Pág. 35 - 40
High-speed circuit breakers (HSCB) used in DC circuits are one of the basic elements of overload, short-circuit and electric shock protection. Such breakers are used in transport (trams, trolleybuses, subways and railways) in electric power supply facili...
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Ryan J. McCarty and Konstantinos P. Giapis
This paper summarizes the design and construction of an adaptable electrospinner capable of spinning fluids over a large range of viscosities. The design accommodates needless electrospinning technologies and enables researchers to explore a large range ...
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Rolf Behling
Abrupt formation of plasma in a high-voltage insulating vacuum gap and subsequent discharge of electrodes limits the reliability of a class of vacuum electronic devices, such as X-ray tubes. It has been suggested that electron field emission from negativ...
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Michael Zipf, Samarth Kumar, Hendrik Scharf, Christoph Zöphel, Constantin Dierstein and Dominik Möst
The integration of different stakeholders? perspectives when planning large-scale infrastructure projects such as power transmission lines is becoming increasingly important in the public debate. Partly conflicting interests of stakeholders should be tak...
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