Abstract
The method of frequency transformations measurement for digital power of electrical signals meters is offered. The method is based on instantaneous power correlation processing. Such approach allows increasing noise immunity of the proposed method, and, as a consequence, its accuracy. Proposed mathematical theory to estimate the variance measurement error of the power of electrical signals. Proposals have been made to reduce the error in measuring the power of electrical signals. The analysis of the interference immunity of the correlation method for measuring power can be extended to the condition under which the interference spectra in voltage and current signals are different.
Highlights
The application of such methods is limited by the lack of applied theory for estimating their errors, and the synthesis of appropriate meters
In this paper we evaluate the methodological errors of digital correlation method of power measurement: sampling and quantization errors, as well as instrumental dynamic dating error, or aperture error depending on the sampling parameters, based on the general theory of digital signal processing presented in [4]
The method is based on instantaneous power correlation processing
Summary
The method of frequency transformations measurement for digital power of electrical signals meters is offered. The method is based on instantaneous power correlation processing. Such approach allows increasing noise immunity of the proposed method, and, as a consequence, its accuracy. Proposed mathematical theory to estimate the variance measurement error of the power of electrical signals. Proposals have been made to reduce the error in measuring the power of electrical signals. The analysis of the interference immunity of the correlation method for measuring power can be extended to the condition under which the interference spectra in voltage and current signals are different
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