摘要
金属氧化物限压器(MOV)是快速开关型串联电容补偿装置中的关键元件之一,其容量的选择取决于快速开关合闸时间、短路电流值的大小、非线性阀片并联时的不均匀系数以及阀片温度特性等因素。由于MOV的工况与Zn O避雷器不同,其承受的负荷是由工频而不是雷电或者操作过电压产生,作用时间长,因而,MOV容量的选择与常规避雷器存在很大差别。采用EMTP数值仿真方法对上述各影响因素进行了计算分析,给出了各因素与MOV吸收能量的关系,提出了在实际串联补偿装置设计时必须综合考虑各方面的因素并进行技术经济分析后确定MOV的容量。
MOV is one of the key elements of highspeed- switchgear-type series capacitor compensation, and its capacity is determined by the close time of highspeed-switchgear, the current value of short circuit and the nonuniform coefficient of shunt connected non-line valves and the temperature charac- teristic of valves. Because of the different working conditions, MOV bears the power freqrtency stress rather than lighting or switching stress, thus the stress applied is longer, and the method to determine the capacity of MOV is quilt different from those for conventional lightning arrestors. This paper makes an analysis of the above effect ：factors using the EMTP, and gives the relationship between the energy MOV received and the effect factors. The paper puts forward the MOV capacity which should be determined by comprehensively considering all the effect factors and through the tech-economic analysis in the practical design of the series shunt reactors.
出处
《电网与清洁能源》
北大核心
2016年第6期7-10,15,共5页
Power System and Clean Energy
基金
国家自然科学基金项目支持(51277148)~~
