【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。更多还原

【Abstract】 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.更多还原