箔式空心电抗器雷电冲击过电压计算与分析  

Calculation and Analysis of Lightning Overvoltage for Foil-wound Air-core Reactors

作　　者：张卜元[1] 赵科 邹军[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]国网江苏省电力公司电力科学研究院,南京211103

出　　处：《高电压技术》2016年第2期666-672,共7页High Voltage Engineering

摘　　要：箔式电抗器与传统线绕电抗器在结构上有显著差异。为了计算箔式电抗器在标准雷电冲击波作用下的暂态波过程,对某箔式电抗器绕组进行了单元划分,对各单元等效自感参数、互感参数及电容参数进行了计算,并得到其等效电路。利用电路仿真软件PSpice,对该箔式电抗器等效电路雷电冲击过电压进行了求解。结果表明,在电抗器末端悬空情况下,其各段线圈首端过电压幅值由入波端向悬空端单调递增,最大对地过电压幅值为1.20(以入端雷电波幅值作为基准值),最大层间电压为1.10×10-3,最大段间电压为8.64×10-2;在电抗器末端接地情况下,其各段首端过电压幅值由入波端向接地端单调递减,最大对地过电压幅值为1.00,最大层间电压为2.61×10-3,最大段间电压为0.11。The structure of foil-wound reactor is significantly different from that of wire-wound reactor. In order to cal- culate the lightning overvoltage in foil-wound reactor, we introduced the element dividing scheme and the methods for calculating the self-inductance, mutual-inductance, and capacitance parameters of the elements. Using the PSpice soft- ware,we analyzed the equivalent circuit of certain type foil-wound reactor. The results show that, with the reactor＇s bottom being floated, the overvoltage increases monotonically from the first section to the last section of foil-wound reactor. The maximum reactor-to-ground overvoltage, the overvoltage between layers and the overvoltage between sec- tions are 1.20, 1.10×10-3, and 8.64×10-2, respectively （with the peak value of the input lightning voltage being the reference value）. With the reactor＇s bottom being grounded, the overvoltage decreases monotonically from the first sec- tion to the last section of the foil-wound reactor. The maximum reactor-to-ground overvoltage, the overvoltage between layers, and the overvoltage between sections are 1.00, 2.61 ×10-3, and 0.11, respectively.

关 键 词：箔式电抗器 雷电冲击过电压 等效电路 参数计算 PSPICE软件 暂态分析 

分 类 号：TM47[电气工程—电器]