Results 41 to 50 of about 181 (134)
Impact of MOV models on asymmetrical fault current calculations in fixed series compensated lines
, 2017 The investigation carried out in the paper addresses the effect of series compensation on short circuit calculations in Extra High Voltage (EHV) system.
Shenoy, U J +5 more
core +1 more source
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
International Journal of Electrical Power & Energy SystemsThe DC fault is a serious challenge to voltage-source-converter-based HVDC (VSC-HVDC) systems, and the fault current limiter (FCL) is one of the key measures to solve the DC fault and reduce the capacity of the DC circuit breaker.
Ziao Yuan +4 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.In this method, by increasing the degrees of freedom of the unbalanced IEEE 906 bus low‐voltage reference network through load transfer switches, the optimal network configuration is proposed using a meta‐heuristic algorithm to solve this constrained large‐scale optimization problem for the purpose of electrical losses reduction.
Pooya Najafi Zanjani +3 more
wiley +1 more source
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
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
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
The effects of fast rise multiple lightning impulse on the physical and LC Circuit Parameters of MOV [PDF]
, 2006 The behaviour and performance of lightning protective devices such as metal oxide varistor under the application of multiple lightning impulse are different from the standard single stroke test.
Wong, Ing Siong
core
Investigation into the equivalent circuit of MOV and the determination of its parameters
, 2004 The Metal Oxide Varistor (MOV) has been widely utilized in the power industry due to its high degree of nonlinearity and excellent capability of carrying a large amount of electrical current.
Zhou, Chengke +3 more
core +1 more source
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