变电站电磁瞬态过程的Prony分析  

Prony analysis on electromagnetic transient process in substation

作　　者：吴茂林[1] 崔翔[1] 卢铁兵[1] 张卫东[1] 

机构地区：[1]华北电力大学电力工程系,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2004年第2期24-27,共4页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50077006);教育部高等学校优秀青年教师奖励基金计划;骨干教师资助计划.

摘　　要：在变电站内,一次回路中的开关操作会在高压母线上产生电磁瞬态过程。该电磁瞬态过程将在电压互感器二次侧产生瞬态电压,从而在二次回路中产生干扰。利用Prony法对母线上以及互感器二次侧的电磁瞬态过程进行拟合,得到了相应的时域表达式。对拟合得到的时域表达式进行傅立叶变换,可得到电磁瞬态过程的频率特性。结果表明,Prony法是分析变电站电磁瞬态过程的一种有效方法。In substation, the switching operation in the primary circuit will cause the electromagnetic transient process in the high-voltage bus, which in turn produces the transient voltage in the secondary side of the potential transformer (PT) and consequently the interference in the secondary circuit. Prony method is used to fit the electromagnetic transient processes in the high-voltage bus and the secondary side of the PT, and the time-domain expressions of the electromagnetic transient processes are obtained. If the time-domain expression is transformed with the Fourier transformation, its frequency characteristic will be acquired. The results prove that Prony method is effective for analyzing the electromagnetic transient process in substation.

关 键 词：变电站 电磁瞬态过程 PRONY法 傅立叶变换 数学模型 

分 类 号：TM63[电气工程—电力系统及自动化]