Title :
Tracking generator of calibrated harmonics
Author_Institution :
Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy
Abstract :
A tracking generator of calibrated harmonies has been experimented at IEN. This system acquires the sinusoidal input supplied by a precision AC calibrator and the internal DSP produces, by means of a DAC, an output signal combination of calibrated harmonics components, which is added to the sinusoidal signal of the calibrator. In this way an ordinary 12 bit DAC can obtain a precision signal with an assigned THD less than 10%. Some algorithms for generating the signal and for tracking with high accuracy the internal reference to the external input signal have been developed. By means of them the frequency and phase difference can be recovered within than 10-4 rad in less than 0.1 s
Keywords :
calibration; digital signal processing chips; digital-analogue conversion; harmonic distortion; phase locked loops; tracking; waveform generators; AC generator; DAC; PLL; analog adder; calibrated harmonics; distorted waveform; frequency difference; harmonic distortion; high accuracy; internal DSP; output signal combination; phase differenc; precision AC calibrator; precision signal; signal generation algorithms; sinusoidal input; tracking generator; Circuits; Digital signal processing; Electric variables measurement; Frequency; Phase distortion; Power generation; Power measurement; Power system harmonics; Signal generators; Tracking loops;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928893
