Authors: B. Boulet, L. Kadar, J. Wikston
IEEE Instrumentation and Measurement Technology Conferece, Ottawa, Canada, May 1997
Abstract
The dynamics of current and voltage transformers often limit the accuracy of measurements in high voltage power systems. These dynamics may not be well known, but frequency response data obtained on the instrument transformer may be available for a finite set of frequencies. A compensating digital filter that approximately inverts the instrument transformer's frequency response is calculated using frequency-domain interpolation techniques. The Power Quality Analyser makes use of the compensating filter technique for improved accuracy of its real time power quality calculations and analyses.
