@article{10902/22090,
year = {2021},
month = {6},
url = {http://hdl.handle.net/10902/22090},
abstract = {The two-sample phase locked loop (2S PLL) in single-phase digitally controlled grid-connected power converters provide synchronization with a minimal computational burden. However, the distortion of the grid voltage deteriorates the performance of the 2S quadrature signal generator. To solve this issue, this article introduces a harmonic filtering (HF) structure based on observers of the input voltage for the fundamental and selected harmonics. The stability and sensitivity of the 2S PLL with HF is analyzed. In comparison with second-order generalized integrator (SOGI)-based HF, the observers provide a narrower bandpass, and the subsequent deterioration of the response time is compensated by adapting the filter gains dynamically. The results obtained, both in simulation and experimentally, validate the proposal and compare its performance with other widely adopted PLLs providing harmonic rejection capability. The computational burden is analyzed and in the case of the proposals depends on the number of observers and the use or not of the adaptive strategy based on steepest descent.},
organization = {This work has been supported by the Spanish Ministry of Science and Innovation under Project RTI2018-095138-B-C31 PEGIA Power Electronics for the Grid and Industry Applications.},
publisher = {Institute of Electrical and Electronics Engineers},
publisher = {IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021, 9(3), 3072-3082},
title = {Two-sample PLL with harmonic filtering capability applicable to single-phase grid-connected converters},
author = {Lamo Anuarbe, Paula and Pigazo López, Alberto and Azcondo Sánchez, Francisco Javier},
}