一种基于FFT谱分析的水电机组相干性判定新方法  

A New Method Based FFT Spectrum Analysis for Predicting Hydroelectric Generating Set Coherence

作　　者：包晓晖[1] 高厚磊[2] 

机构地区：[1]福建水利电力职业技术学院,福建永安366000 [2]山东大学电气工程学院,山东济南250100

出　　处：《水电能源科学》2016年第4期143-145,74,共4页Water Resources and Power

基　　金：福建省教育厅科技项目(JB13313)

摘　　要：为判定发电机相干性,提出了一种基于发电机功角预测和谱分析技术的新方法,即先推演电力系统模型的泰勒级数展开式来预测发电机过渡过程的功角,再以此作为采样数据进行FFT谱分析。运用基于谱分析的发电机相干性判定准则对一个9机组34节点的电力系统进行仿真,验证了该方法快速、有效,且具有实际意义。For predicting hydroelectric generating set coherence,this paper put forward a new technical method based on predicting of alternator power angle and spectrum analysis.That is,firstly it deduced the Taylor＇s series expansion of power system model to predict rotor angle of the transitional process.And then the FFT spectrum analysis was implemented by taking the predicted rotor angle as the sampled data.Based on spectral analysis prediction of the generators coherence estimation for a 9unit 34-node power system simulation,it demonstrate that the method is fast,effective,and meaningful.

关 键 词：水电机组 相干性 FFT谱分析 判定 

分 类 号：TM622[电气工程—电力系统及自动化]