Title :
The effect of current and voltage transformers accuracy on harmonic measurements in electric arc furnaces
Author :
Kadar, Laszlo ; Hacksel, Peter ; Wikston, James
Author_Institution :
Hatch Assoc. Ltd., Mississauga, Ont., Canada
Abstract :
This paper presents a method to correct for measurement error, which can be introduced by current and voltage transformers. Motivated by the development of an accurate real-time power quality analyzer, a compensation scheme was developed and implemented as a digital filter. An example 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 error
Keywords :
arc furnaces; current transformers; digital filters; electric current measurement; frequency-domain analysis; harmonics; measurement errors; potential transformers; power supply quality; voltage measurement; compensated system; current measurement; current transformers accuracy; digital filter; electric arc furnaces; frequency domain test; harmonic measurements; measurement error correction; real-time power quality analyzer; uncompensated system; voltage measurement; voltage transformer accuracy; Current measurement; Current transformers; Electric variables measurement; Frequency; Furnaces; Instrument transformers; Measurement errors; Power harmonic filters; Power quality; Voltage transformers;
Journal_Title :
Industry Applications, IEEE Transactions on
