The quantizing error , linear error and differential linear error of an a / d converter were deduced , after that the error model of synchronous sampling , asynchronous sampling and quasi - synchronous sampling algorithms used in power measurement were build in condition that a / d was not perfect 推導(dǎo)了a / d量化誤差、非線性及微分非線性誤差的數(shù)學(xué)模型。然后,建立了采樣功率測量同步采樣算法、非同步采樣算法和準(zhǔn)同步采樣算法在非理想情況下的計算機(jī)仿真模型。
Abstract : the paper proposes a mathematical model of a / d converter with quantizing error , nonlinearity and differential nonlinearity errors for computer simulation , and based on the model , the errors caused by voltage change , current change and phase change in the power measurement are analyzed by computer simulation for both the asynchronous and quasi - synchronous sampling algorithms 文摘:本文提出了具有量化誤差、非線性誤差和微分非線性誤差的a / d轉(zhuǎn)換器的數(shù)學(xué)模型,在該數(shù)學(xué)模型的基礎(chǔ)上,仿真分析了非同步采樣法、準(zhǔn)同步采樣遞推算法各種情況下的誤差,包括功率測量中電壓線性、電流線性、相位變化誤差及電壓測量的誤差。