本文選題：互感器 + 虛擬儀器�。� 參考：《電網(wǎng)與清潔能源》2015年11期

【摘要】：鑒于傳統(tǒng)的FFT(快速傅里葉)算法僅適用于整周期采樣后的離散信號,電流互感器校驗系統(tǒng)硬件容易混入噪聲等問題,基于矩形卷積窗算法設(shè)計了一種可對電子式電流互感器進(jìn)行不停電校驗的在線校驗系統(tǒng)。介紹了校驗系統(tǒng)的整體結(jié)構(gòu),采用FFT加四重矩形卷積窗的高精度插值算法,并設(shè)計了一種復(fù)合濾波法程序以消除隨機誤差。其中,設(shè)計的虛擬校驗系統(tǒng)可以有效降低硬件成本,避免硬件中可能混入的噪聲,可以針對現(xiàn)場運行的電子式電流互感器進(jìn)行在線校驗,更精確地反映一次側(cè)電流電壓值,提高了電力系統(tǒng)的可靠性。實驗結(jié)果表明:相對于傳統(tǒng)的FFT算法的校驗系統(tǒng),所設(shè)計基于矩形卷積窗算法的虛擬校驗系統(tǒng)有更高精度。
[Abstract]:Since the traditional FFT (Fast Fourier transform) algorithm is only suitable for discrete signals after the whole period sampling, it is easy to mix noise into the hardware of the current transformer calibration system. Based on the algorithm of rectangular convolutional window, an online calibration system is designed to check the failure of the electronic current transformer. This paper introduces the whole structure of the checking system, adopts the high precision interpolation algorithm of FFT and quadrilateral convolution window, and designs a compound filter program to eliminate the random error. The designed virtual calibration system can effectively reduce the cost of hardware and avoid the possible noise in the hardware. It can be used to calibrate the electronic current transformer running in the field and reflect the primary side current and voltage more accurately. The reliability of power system is improved. The experimental results show that the virtual verification system based on the rectangular convolution window algorithm is more accurate than the traditional FFT algorithm.
【作者單位】： 湖北宜昌供電公司;三峽大學(xué)電氣與新能源學(xué)院;
【基金】：國家自然科學(xué)基金項目(51507091)~~
【分類號】：TM452
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本文編號：1943746