摘要
MOV(metal oxide varistors)被广泛应用在低压配电系统的后续雷击防护中,MOV的应用特性已被广泛研究。但为了便于设计,常常需要借助仿真手段进行初步研究来对MOV进行选型;因此MOV的建模便成了重要的一方面。基于PSPICE,考虑了MOV在小电流区的伏安特性和快速脉冲作用下响应特性,并转化成电路模型,给出了MOV在全电流下的模型;并利用8/20μs冲击电流发生回路和上升时间为2 ns的方波回路进行实测。仿真验证了模型的可行性。这对工程设计有一定的应用价值。
The Metal Oxide Varistors （MOV）, of which the application features have been extensively re-searched, are widely used in the follow-up lightning protection in the low voltage power distribution system. Howev-er, to facilitate the design process, the simulation is always carried out to have preliminary study on the model se-lection of MOV, and therefore the MOV modeling becomes important. Based on the PSPICE, two characteristics of MOV, i. e. , the V-A characteristic in the low current region and the response characteristic under fast impulses, are considered, for a circuit model to be translated into and further a MOV model under total current conditions giv-en. What＇ s more, the 8/20 μs impulse current generator and the square wave circuit with a rising edge of 2 ns are utilized to have actual measurement, to a conclusion that the simulation results verify the feasibility of the model. This is of a certain application value to engineering design.
出处
《科学技术与工程》
北大核心
2014年第2期112-115,共4页
Science Technology and Engineering
基金
国家自然科学基金(41075025)资助
