As to steady state phenomena, the traditional signal analysis tool FFT is used forharmonic analysis, which is also conceived for a means to distinguish harmonic andflicker.

• 针对电力系统的稳态现象，本文利用快速傅立叶变换方法对谐波、闪变和纯正弦波电压等典型现象进行了分析，由傅立叶频谱作为区分谐波和闪变的一种手段。