Results 51 to 60 of about 703 (139)
Dianci bileiqi, 2011 MOV型SPD在运行时,一些因素会使MOV启动后的电流过大,电流发热量超出MOV热容量就会使SPD失效。国家标准中热稳定实验考查的就是MOV对于这种热量累积的耐受程度。对国家标准中关于MOV（Metal Oxide Varistor）型SPD（Surge Protective Device）的热稳定性判断条件进行试验和分析,对比了直流和交流电压两种情况下的热量累积并设计试验。把直流电和交流电热累积统一到"热阻"的概念,试验表明,直流电造成的SPD发热量比交流电造成的SPD发热量大10%。
杨天琦, 王振会, 朱传林, 孙涌
doaj
Consideration of surge arresters for low voltage mains applications [PDF]
, 2012 The work presented in this report details the background to surge arresters and surge protective device components, viz., spark gaps, gas discharge tubes and metal oxide varistors.
Michalopoulos, Aristidis
core
A Device for Investigating the AC Characteristics of Metal Oxide Varistors
IET Power Electronics, Volume 18, Issue 1, January/December 2025.This study presents an insulated‐gate bipolar transistor‐based device designed to address the limitations of existing power supply systems, which are unable to simultaneously maintain waveform stability and provide sufficient power when varistors operate in the non‐linear region. ABSTRACT In recent years, the AC characteristics of metal oxide varistors
Xinyan Xiao, Lanjun Yang, Yonggang Yue
wiley +1 more source
STUDY ON SURGE ARRESTER PERFORMANCE DUE TO LIGHTNING STROKE IN 20 KV DISTRIBUTION LINES [PDF]
, 2009 Abstrak Electric energy has been transmiting from power station to end user with transmission and distribution lines. Lightning strokes are problems that occure in transmission and distribution lines and make them fault when the electric energy were ...
Liliyana NS, Liliyana NS +2 more
core
Computer Aided Model for a Low Voltage Varistor with Increased Thermal Stability [PDF]
, 2019 Metal Oxide Varistors are a very common power electronic device, applied for efficient overvoltage protection at any voltage level. This piece of equipment has a high non-linear current response function of the applied voltage, and, it provides a ...
Balcu, Florin I. +5 more
core +2 more sources
A novel thyristor‐based hybrid DC circuit breaker with short arcing capability
High Voltage, Volume 9, Issue 6, Page 1288-1301, December 2024.Abstract Multi‐terminal flexible high‐voltage direct current (HVDC) transmission and DC grid technology are developing rapidly. The hybrid DC circuit breaker (HCB) has broad application prospects in the field of HVDC transmission and DC power grid. Nevertheless, existing HCBs have one or more following blemishes: arc suppression scheme of mechanical ...
Guanlong Jia +4 more
wiley +1 more source
Gaoya dianqi, 2014 结合串联补偿装置的工作原理,仔细分析了金属氧化物限压器（metal oxide varistor,MOV）的工况,比较了TCSC与FSC不同构成的串联补偿装置中MOV的特点,对MOV的过电压保护和控制措施进行了较深入的讨论、总结。对设计MOV的关键技术——保护水平、能量耐受和工频电压稳定性、电流分布、特殊的短路电流释放能力等进行了深入研究。笔者根据国内某一500 kV交流电力系统串补工程的招标技术要求,设计了复合外套和瓷外套不同结构的MOV,产品通过了中国电力科学研究院的型式试验,满足工程需要。
赵冬一 +5 more
doaj
Detection of failures in HV surge arrester using chaos pattern with deep learning neural network
IET Science, Measurement &Technology, Volume 18, Issue 9, Page 603-615, November 2024.This paper proposes a fault diagnosis method for HV surge arresters based on the chaotic system and CNN. Compared to AlexNet, HOG+BPNN, HOG+SVM, HOG+DT, and HOG+KNN detection methods, the accuracy of the method proposed in this paper is 97%. Abstract As a protective component of HV equipment, the primary function of a surge arrester is to mitigate the ...
Chun‐Chun Hung +3 more
wiley +1 more source
Rural Facility Electric Power Quality Enhancement [PDF]
, 1991 Electric power disturbances are known to be more prevalent in small, isolated power systems than in larger interconnected grids which service most of the United States. This fact has given rise to a growing concern about the relative merits of different
Aspnes, J.D. +3 more
core
Recycling Zinc from Metal Oxide Varistors Through Leaching and Cementation of Cobalt and Nickel [PDF]
, 2017 Metal oxide varistors (MOVs) are housed in a surge arrestor and composed of zinc oxide (> 90 wt%) and other metal oxides such as antimony, bismuth, cobalt, manganese, and nickel.
Colombus, Yuda Chryspian +2 more
core +1 more source