CAJ | 학술논문

国际电工委员会（IEC）闪变仪无法准确测量高频间谐波引起的峰值波动闪变,为此提出了一种改进的时域和频域混合方法用于高频间谐波引起的闪变测量。在时域方面,采用一种同步解调方法替代IEC方法中的平方解调以提取高频间谐波引起的波动信号,该方法首先采用一种简单的方法提取基波同步信号,然后将该信号的奇次方进行配比运算得到同步的谐波信号集合,最后则通过谐波信号集合对原始信号进行运算以实现对高频间谐波信号的解调。在频域方面,则采用递推傅里叶变换对不同频率分量进行视感度加权的方法代替原有的视感度加权滤波器,以弥补视感度加权滤波器无法准确模拟视感度曲线的缺陷。在Labview中搭建了相应算法的模型,通过实验证明了所述算法能准确检测高频间谐波引起的闪变。最后还通过所述方法制定了单个间谐波和间谐波对决定的间谐波闪变曲线,分析了不同频段间谐波闪变限值的特点。
국제전공위원회（IEC）섬변의무법준학측량고빈간해파인기적봉치파동섬변,위차제출료일충개진적시역화빈역혼합방법용우고빈간해파인기적섬변측량。재시역방면,채용일충동보해조방법체대IEC방법중적평방해조이제취고빈간해파인기적파동신호,해방법수선채용일충간단적방법제취기파동보신호,연후장해신호적기차방진행배비운산득도동보적해파신호집합,최후칙통과해파신호집합대원시신호진행운산이실현대고빈간해파신호적해조。재빈역방면,칙채용체추부리협변환대불동빈솔분량진행시감도가권적방법대체원유적시감도가권려파기,이미보시감도가권려파기무법준학모의시감도곡선적결함。재Labview중탑건료상응산법적모형,통과실험증명료소술산법능준학검측고빈간해파인기적섬변。최후환통과소술방법제정료단개간해파화간해파대결정적간해파섬변곡선,분석료불동빈단간해파섬변한치적특점。
IEC flickermeter cannot accurately measure peak fluctuation flicker caused by high-frequency interharmonics,therefore,an improved hybrid time and frequency domain method for the flicker measurement caused by high-frequency interharmonics is presented here.In the time domain,a synchronous demodulation method is used to replace square demodulation of the IEC method to extract fluctuant signal caused by high-frequency interharmonics.Firstly,a simple method is used to extract the synchronizing fundamental signal,then ratio operation is performed to odd power of the signal to get synchronous harmonic signal set,and finally the high-frequency interharmonic signals are demodulated through operating the original signal with harmonic signal set.In the frequency domain,the recursive Fourier transform is used,and then,different frequency components are weighted according to a visual sensitivity curve.This process is used to compensate for the defect that visual sensitivity weighting filter cannot accurately simulate the visual sensitivity curve.Corresponding algorithm model is built in Labview,experiments are conducted to prove that the proposed algorithm can accurately detect the flicker caused by high-frequency interharmonics.Finally,the interharmonics flicker curve caused by a single interharmonic and a pair of interharmonics is obtained through the proposed method,and the characteristics of interharmonics flicker limits of different frequency bands are analyzed.