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《Insulators and Surge Arresters》 2008-01
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Appling of Simultaneous Sampling in MOA Performance Inspection

FU Zhong-jun(Jiangsu Teachers University of Technology,Changzhou 213001,China)  
The fundamentals of measurement of cardinal wave of resistive current was described and the necessity for simultaneous sampling at measuring cardinal wave of resistive current was analyzed.Application of AD converter MAX1310 can ensure simultaneous sampling of voltage and current signals avoiding measurement error of projection angle.Application of locked phase loop technology may realize sampling at integer points of given period.Practice shows considerable rise of measurement precision(esc in case of angle measurement) with usage of simultaneous sampling which reduces the grid leakage effect occurred at sampling at non-integer period,making possibility of applying FFT harmony analysis to measurement of cardinal current wave and reducing the angle measurement error between cardinal voltage and current.The simultaneous sampling technique has an universal significance in accurate measurement of angle between two cardinal wave signals.
【CateGory Index】: TM862
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