VFTO作用下变压器绕组的过电压计算  

Computation of Very Fast Transient Overvoltages in Transformer Windings

作　　者：张喜乐[1] 梁贵书[1] 孙海峰[1] 崔翔[1] 

机构地区：[1]华北电力大学电气工程学院,保定071003

出　　处：《高电压技术》2005年第8期4-6,26,共4页High Voltage Engineering

基　　金：河北省自然科学基金资助项目(No.503624)

摘　　要：为研究气体绝缘变电站中陡波前过电压对变压器的影响和解决大型电力变压器建模时矩阵阶数过大问题,详细推导了以匝为单元建立的变压器绕组多导体传输线(MTL)模型的计算公式,提出了该模型结合等效阻抗建立变压器绕组模型的新方法,有效地提高了计算效率。仿真与试验结果说明该法正确可行。To study the transient process of transformer windings under Very Fast Transient Overvoltages （VFTOs） generated by switching operations in Gas Insulated Substation （GIS） and to simplify the calculation of modeling a power transformer, this paper deduces the solution procedure to Multi-conductor Transmission line （MTL） model based on the representation of transformer windings by its individual turns, and it presents a hybrid model based on MTL using equivalent impedance. For validation, the calculated results are compared with the measurements on a transformer winding model and the result is satisfactory.

关 键 词：陡波前过电压 变压器模型 多导体传输线 等效阻抗 

分 类 号：TM403[电气工程—电器]