Correction of delays in channels of information-measuring system by methods of digital signal processing by analysis of harmonics of current and voltage

Abstract

The article considers an effective algorithm for group delay correction in the channels of multichannel information and measurement systems. The description of the method is carried out for the case of harmonics measuring for current and voltage in electrical networks. The algorithm is based on the linear interpolation method using a non-recursive digital filter. The filter coefficients are a discretized windowed sinc. After the description of the method, the results of effective band modeling of the interpolating filter are presented. In conclusion, recommendations are given to reduce the amount of processor memory in the implementation of the algorithm.

Keywords

• electric energy quality
• current and voltage harmonics
• dirac delta function
• interpolation error
• digital filter
• window methods
• linear transformations