TY - GEN
T1 - Implementation of PLL and FLL trackers for signals with high harmonic content and low sampling frequency
AU - Mathe, Laszlo
AU - Iov, Florin
AU - Sera, Dezso
AU - Török, Lajos
AU - Teodorescu, Remus
PY - 2014
Y1 - 2014
N2 - The accurate tracking of phase, frequency, and amplitude of different frequency components from a measured signal is an essential requirement for many digitally controlled equipment. The accurate and robust tracking of a frequency component from a complex signal was successfully applied for example in: grid connected inverters, sensorless motor control for rotor position estimation, grid voltage monitoring for ac-dc converters etc. Usually, the design of such trackers is done in continuous time domain. The discretization introduces errors which change the performance, especially when the input signal is rich in harmonics and the sampling frequency is close to the tracked frequency component. In this paper different discretization methods and implementation issues, such as Tustin, Backward-Forward Euler, are discussed and compared. A special case is analyzed, when the input signal is reach in harmonics and the sampling frequency is only 10 times larger than the tracked frequency component.
AB - The accurate tracking of phase, frequency, and amplitude of different frequency components from a measured signal is an essential requirement for many digitally controlled equipment. The accurate and robust tracking of a frequency component from a complex signal was successfully applied for example in: grid connected inverters, sensorless motor control for rotor position estimation, grid voltage monitoring for ac-dc converters etc. Usually, the design of such trackers is done in continuous time domain. The discretization introduces errors which change the performance, especially when the input signal is rich in harmonics and the sampling frequency is close to the tracked frequency component. In this paper different discretization methods and implementation issues, such as Tustin, Backward-Forward Euler, are discussed and compared. A special case is analyzed, when the input signal is reach in harmonics and the sampling frequency is only 10 times larger than the tracked frequency component.
U2 - 10.1109/OPTIM.2014.6851014
DO - 10.1109/OPTIM.2014.6851014
M3 - Article in proceeding
SN - 978-1-4799-5183-3
T3 - Optimization of Electrical and Electronic Equipment (OPTIM), Proceedings
SP - 633
EP - 638
BT - Proceedings of the 14th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2014
PB - IEEE Press
T2 - 14th International Conference on Optimization of Electrical and Electronic Equipment
Y2 - 22 May 2014 through 24 May 2014
ER -