基于全相位傅里叶变换的煤矿电网电能质量分析  

Analysis of power quality of coal mine grid based on all-phase fast Fourier transform

作　　者：任子晖[1] 付华科[1] 李伟泺[1] 岳明道[2] 吴新忠[1] 刘伟伟[1] 

机构地区：[1]中国矿业大学信电学院,江苏徐州221008 [2]宿州学院机械与电子工程学院,安徽宿州234000

出　　处：《电力系统保护与控制》2011年第22期103-107,共5页Power System Protection and Control

基　　金：安徽省高校优秀青年人才基金项目(2009SQRZ170)

摘　　要：根据当前煤矿电网负荷特点,在详细对比了当前谐波和间谐波分析方法的基础上,引入全相位傅里叶变换对煤矿电网中的谐波和间谐波进行分析。在谐波的测量中,对基于Hanning加窗插值法、基于B-H加窗插值法、基于Blackman加窗插值算法和全相位傅里叶算法分别进行了仿真计算比较。发现基于全相位傅里叶算法对谐波的测量误差远远小于其他三种加窗算法。在间谐波的测量中,对比了Rife-Vincent(Ⅲ)窗法和全相位傅里叶算法的仿真计算结果,表明基于全相位傅里叶算法对间谐波相位和频率的测量误差远远小于Rife-Vincent(Ⅲ)窗法,对间谐波的幅值测量精度也远高于Rife-Vincent(Ⅲ)窗法。仿真计算结果表明,基于全相位傅里叶修正算法能对谐波中的偶次、奇次及间谐波中的特定次谐波进行有效测量分析,该算法精度高,可靠性高。The all-phase fast Flourier transform is adopted to analyze the harmonic and inter-harmonic of coal mine grid based on a detailed comparison of the current analytical methods for harmonic and inter-harmonic according to the grid load characteristic. In harmonic measurement, it compares the simulation results of all-phase fast Flourier transform with Harming-based window interpolation method, B-H based window interpolation method, and Blackman based interpolation method. It is found that the accuracy of all-phase fast Fourier transform is higher than that of other methods. In inter-harmonic measurement, it compares the accuracy of all-phase fast Flourier transform with the Rife-Vincent （Ⅲ） window, and the simulation results show that the accuracy the phase and frequency of inter-harmonic with all-phase fast Flourier transform is higher than the Rife-Vincent （Ⅲ） window. The simulation results show that Fourier correction algorithm based on all phase can effectively measure and analyze the even and odd harmonics, as well as the specific harmonic of the inter-harmonic, and it has the advantages of high precision and high reliability.

关 键 词：电能质量 谐波 间谐波 全相位傅里叶变换 插值 窗函数 

分 类 号：TM711[电气工程—电力系统及自动化]