Results 21 to 30 of about 124 (111)
Current interruption tests of HVDC circuit‐breakers: Requirements, methods and a testing case
IET Generation, Transmission & Distribution, 2022 Development towards HVDC grids is drawing intense development of HVDC circuit‐breakers (CBs). The increasing rated voltage and capacity requires HVDC CBs with excellent performance to be installed and comprehensive tests on HVDC CBs are indispensable ...
Shenli Jia +6 more
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Calculation and protection on the lighting intruding waves of 550 kv GIS substation
The Journal of Engineering, 2018 Electromagnetic Transient Programme has been used to calculate the lightning intruding wave of 550 kV GIS substation. The effects of mode operation, surge impedance and length of cable have been considered in the process of calculation.
Dongpeng Sui +5 more
doaj +1 more source
Residual Voltage Tests of 4.5 kV Metal Oxide Surge Arrester
2023 14th International Conference on Electrical and Electronics Engineering (ELECO), 2023 Overvoltages can cause various malfunctions in electrical power systems and high voltage facilities. Metal oxide surge arresters (MOSAs) are used to prevent overvoltage-related malfunctions in electrical power systems and high voltage facilities. MOSAs protect the system from high amplitude currents by conducting overvoltage-induced discharge currents ...
Tunç, Emre, Fidan, Murat
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Analysis and comparison of metal-oxide surge arrester models
Technology audit and production reserves, 2017 The objects of the research are: full and simplified dynamic models of surge arresters, as well as the model of surge arrester in the form of a nonlinear resistor. For the simulation of the voltage-current characteristics, in the latter case the approximation was used, describing by one expression both switching and lightning surge domain.
Brzhezitsky, Volodymyr +2 more
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Design of Defect Identification and Location System for UHV AC Surge Arrester
IEEE AccessUltra high voltage (UHV) metal oxide arrester (MOA) is prone to problems such as resistance sheet aging and moisture exposure during long-term operation.
Dantian Zhong, Lei Gao, Zhiyuan Cai
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Simplified Modeling of Metal Oxide Surge Arresters
Energy Procedia, 2014 AbstractThis paper describes simplified modeling of metal oxide surge arrester (MOSA) to operate analysis. This model is a new model proposed (P-K Model) to verify the accuracy in order to compare with IEEE and Pinceti Model. The simulations are performed with the Alternative Transients Program version of Electromagnetic Transient Program (ATP-EMTP ...
openaire +1 more source
Development of a Low-Energy Mobile Current Waveform Impulse Generator for Application in Low Voltage Surge Arresters [PDF]
Brazilian Archives of Biology and TechnologySurge arresters are at the forefront of protection against voltage surges. The loss of the protective effect of surge arresters imposes accidents and unplanned shutdowns on the power system.
Tiago Goncalves Zacarias +9 more
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Iranian Journal of Electrical and Electronic Engineering, 2014 Metal oxide surge arresters (ZNO) are used widely in power system to protect equipments from over voltages. Non uniform potential distribution leads to the depressed service life and low safe reliability, so grading ring is applied on HV surge arrester ...
M. Khodsuz, M. Mirzaie
doaj
Surge Arrester Monitoring under Different Operating Conditions Using Bees-ANFIS
Iranian Journal of Electrical and Electronic Engineering, 2019 The essential role of surge arresters is equipment protection against over-voltages to increase system reliability. Different monitoring techniques have been used to diagnose surge arrester condition.
M. Khodsuz, S. Seyyedbarzegar
doaj
Iranian Journal of Electrical and Electronic Engineering, 2015 This paper aims to measure and analyze of the leakage current of 20 kV polymer and porcelain metal oxide surge arresters under humid ambient conditions by applying different voltages to the arresters terminal.
K. Mokhtari, M. Mirzaie, M. Shahabi
doaj