电力系统暂态波形分析方法

本文介绍利用非线性最小二乘优化法进行电力系统暂态波形分析的基本原理，改进了各个分量参数初始值的计算方法，提出首先采用快速高精度频谱分析方法（ＦＡＦＴ）求出暂态波形中各个分量的角频率和衰减常数，再利用曲线拟合方法求出各个分量的幅值和初相角，算例表明；本文方法较现有的其它方法大幅度提高了计算精度和收敛速度。

Analysis Method of Transient Waveform in Electric Power System

An analysis method of transient waveform in power system based on non-linear least square optimization approach is presented and basic principle of the method is decribed. The initialization procedure for computing all the parameters of each component in transient waveforms is improved. It uses the fast anti-aliasing Fourier transform method (FAFT)to find the angular frequency and the decay constant,and takes the linear curve fitting method to get the ampltude and the initial phase of each component. Specific examples show that the proposed method in the paper has the superiority of very high precision and very good convergence over the existing methods.