CAJ | 학술논문

采用FFT（快速傅立叶变换）算法在电网中进行应用,方法简单、可靠、精度较高,可以对谐波进行准确分析.利用FFT算法编写谐波分析程序对三相电进行数据采样,采样频率为3 200 Hz,将采样到的数据进行FFT变换.利用FFT的结果求出对应点的幅值,计算基波的频率、幅度,及其有效值;对其他频率的幅值可通过阈值进行判断,超过阈值可认为是谐波信号,并提取其幅值、频率;最后利用提取出来基波和谐波的信息计算谐波次数和谐波的有效值、谐波畸变率等参数.
채용FFT（쾌속부립협변환）산법재전망중진행응용,방법간단、가고、정도교고,가이대해파진행준학분석.이용FFT산법편사해파분석정서대삼상전진행수거채양,채양빈솔위3 200 Hz,장채양도적수거진행FFT변환.이용FFT적결과구출대응점적폭치,계산기파적빈솔、폭도,급기유효치;대기타빈솔적폭치가통과역치진행판단,초과역치가인위시해파신호,병제취기폭치、빈솔;최후이용제취출래기파화해파적신식계산해파차수화해파적유효치、해파기변솔등삼수.
It is simple,reliable and accurate to apply FFT algorithm in a network and an accurate analysis of harmonics can be done.The paper uses FFT algorithm to compile harmonic analysis procedure to conduct data sampling on a three wire electricity,and the sampling frequency is 3200Hz.The sampling data are changed with FFT.KIPPO frequency,amplitude,and the valid values are to be calculated with the help of the results of the corresponding order;other frequency will be the result of the data sampling value judgment,and a harmonic signal is over the threshold,and its value and frequency are extracted;finally the calculations of the harmonic and harmonics valid values,and harmonic distortion rate for parameters are done by using the extracted information and harmonics.