According to the power system coherency and the swing curves of the disturbed generators, apply the data mining and the principle of the correlation, define the indicator for coherence.
文章在电力系统同调性概念的基础上，通过数字仿真获取发电机的时间响应曲线，定义了基于相关性原理的发电机同调指标。
The correlation method and FFT method of the power spectrum estimation could not completely reflect the concept of the power spectrum of the non-stationary random signals because of data truncation.
对于非平稳随机信号的功率谱分析，采用自相关函数傅里叶变换和直接傅里叶变换分析时，由于存在数据截断，二者从概念上都不能很好地反映随机信号的功率谱。
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