@article{YAN2023, 
author = {Qingzeng YAN and Rende ZHAO and Jinkui HE and Zhishun MA and Longzhen GUO},
title = {Research on low-voltage single-phase AC electronic loads with variable power factors based on SOGI-FLL},
year = {2023},
journal = {Experimental Technology and Management},
volume = {40},
number = {6},
pages = {49-53},
keywords = {electronic loads, SOGI-FLL, power factors, dc-link oscillations},
url = {https://www.sciopen.com/article/10.16791/j.cnki.sjg.2023.06.008},
doi = {10.16791/j.cnki.sjg.2023.06.008},
abstract = {In order to overcome the drawbacks of the conventional passive loads with constant parameters, single-phase AC electronic loads with the back-to-back topology have emerged. However, in low-voltage and low-power situations, the grid voltage will be affected by harmonic currents and easily distorted. Therefore, a variable power-factor control strategy based on the second-order generalized integrator frequency locked loop (SOGI-FLL) is proposed. SOGI-FLL is adopted to improve the phase locking accuracy under the distorted grid voltage, and the fundamental and quadrature components are obtained, based on which a control scheme is designed to continuously adjust power factors; the power factor angles of rectifier side and inverter side are controlled cooperatively to reduce dc-link oscillations. Experimental results show that, the designed single-phase low-voltage AC electronic load can simulate capacitive, resistive and inductive loads, respectively, and the power factor is continuously adjustable in the range of 0.5~1.0.}
}