Title :
A New Calibration Method for Current and Voltage Sensors Used in Power Quality Measurements
Author :
Ramos, Pedro M. ; Brás, Nuno B. ; Serra, A. Cruz
Author_Institution :
Dept. of Electr. & Comput. Eng., Tech. Univ. of Lisbon
Abstract :
Sensor calibration plays an important role in instrument development and accuracy. This paper presents a method to calibrate current and voltage sensors specially dedicated to power quality measurements which can significantly reduce the distortions introduced by the sensors. The first approach to sensor calibration is based on the response of sensors to DC values imposed by a calibrator. The second method is an AC calibration, where a 50 Hz power signal is applied to the sensors also through a calibrator. The calibration coefficients are obtained by minimizing the output distortion. The minimized output distortion is assessed by the signal to noise and distortion ratio (SINAD) at the output of the sensor correction module
Keywords :
Hall effect transducers; calibration; distortion; electric current measurement; electric sensing devices; power supply quality; voltage measurement; 50 Hz; AC calibration; current sensors; distortion ratio; instrument accuracy; instrument development; power quality measurement; sensor calibration; signal to noise ratio; sine-fitting; voltage sensors; Calibration; Current measurement; Data acquisition; Hall effect; Instruments; Linearity; Power measurement; Power quality; Transducers; Voltage; power quality; sensor calibration; sine-fitting;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE
Conference_Location :
Sorrento
Print_ISBN :
0-7803-9359-7
Electronic_ISBN :
1091-5281
DOI :
10.1109/IMTC.2006.328579
