沈阳大学学报
瀋暘大學學報
침양대학학보
JOURNAL OF SHENYANG UNIVERSITY
2011年
6期
108-110,114
,共4页
电力系统%谐波检测%快速傅里叶变换(FFT)%窗函数%双峰插值
電力繫統%諧波檢測%快速傅裏葉變換(FFT)%窗函數%雙峰插值
전력계통%해파검측%쾌속부리협변환(FFT)%창함수%쌍봉삽치
power system%harmonic measurement%fast fourier transform（FFT）%window function%double peak of spectral lines interpolation
通过分析比较常用的谐波检测方法,根据电力谐波信号的特点,提出了布莱克曼窗与双峰插值相结合的算法,并推导出频率和幅值的修正计算公式,从而进一步降低了泄漏和噪声干扰,提高了计算频率和幅值的准确度.仿真结果验证了算法的正确性与有效性.
通過分析比較常用的諧波檢測方法,根據電力諧波信號的特點,提齣瞭佈萊剋曼窗與雙峰插值相結閤的算法,併推導齣頻率和幅值的脩正計算公式,從而進一步降低瞭洩漏和譟聲榦擾,提高瞭計算頻率和幅值的準確度.倣真結果驗證瞭算法的正確性與有效性.
통과분석비교상용적해파검측방법,근거전력해파신호적특점,제출료포래극만창여쌍봉삽치상결합적산법,병추도출빈솔화폭치적수정계산공식,종이진일보강저료설루화조성간우,제고료계산빈솔화폭치적준학도.방진결과험증료산법적정학성여유효성.
Through the analysis and comparison of harmonic measurement methods in common use,according to the characteristics of electric harmonic signal,the combination of Blackman window function and the algorithm of double peak of spectral lines interpolation are carried out.Based on this algorithm,the modified formula of frequency and amplitude are obtained by using the polynomial approximation method,which can further reduce leakage and noise interference,and improve the calculation accuracy of the frequency and amplitude.The results of MATLAB simulation have verified the exactness and effectiveness of the algorithm.
