L. Kadar et al., THE EFFECT OF CURRENT AND VOLTAGE TRANSFORMERS ACCURACY ON HARMONIC MEASUREMENTS IN ELECTRIC-ARC FURNACES, IEEE transactions on industry applications, 33(3), 1997, pp. 780-783
This paper presents a method to correct for measurement error, which c
an be introduced by current and voltage transformers, Motivated by the
development of an accurate real-time power quality analyzer, a compen
sation scheme was developed and implemented as a digital filter. An ex
ample of the reduction of measurement error from the uncompensated to
the compensated case is given, It is shown that the compensated system
provides reduction by a factor of more than 1000 in the measurement e
rror.