Results 181 to 190 of about 233 (207)
Some of the next articles are maybe not open access.
Current control optimization for grid-tied inverters with grid impedance estimation
2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2010The control of a PWM inverter is affected by variable inductance present in the power line of the grid. This paper presents a new implementation of grid-tied inverter with weighted-average-current feedback control (WAC) and an embedded online technique to determine the grid line impedance.
Guoqiao Shen +4 more
openaire +1 more source
Seamless Transition between Grid Forming and Grid Following Inverters based on Online Grid Impedance Estimation [PDF]
2025 IEEE Power & Energy Society General Meeting (PESGM)The rapid increase in the penetration of inverterbased resources (IBRs) into the distribution network causes thepower system to behave as a weak grid and often alters system strength. IBRs operate as either grid-following (GFL) or grid forming (GFM) inverters, differing in both control stability and inertia support capabilities under varying operating ...
Pavan Kumar, Yadala +6 more
openaire +1 more source
Grid impedance estimation based on particle swarm optimization
2017 IEEE 2nd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2017The estimation of grid impedance can be used to improve the control performance of the grid-connected inverter in distributed power generation systems and to achieve islanding detection simultaneously. Particle swarm optimization(PSO) algorithm has been widely studied in parameter identification since it converges fast and has few parameters to be set.
Kewen Lin, Fei Xiao, Guisheng Jie
openaire +1 more source
Robustness testing of two impedance estimation techniques in weak grids
IET Conference Proceedings, 2021Due to instability issues that arise in weak grids, knowledge of the grid impedance can improve the performance of converters connected to such networks. The existing method of active and reactive power variation is adapted to weak grid control, where the active power and voltage magnitude are varied instead.
M. Kervyn, K. Ahmed, A. Egea-Alvarez
openaire +1 more source
An Improved Grid Impedance Estimation Technique under Unbalanced Voltage Conditions
2019 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe), 2019The coupling in synchronous reference frame (dq-axis) of grid-connected inverter reduces the estimation accuracy of grid impedance based on variations of inverter's output power. Therefore, in this paper, an improved grid impedance estimation technique (at fundamental frequency) based on small variations of the inverter's output power is proposed ...
Nabil Mohammed +2 more
openaire +1 more source
Hybrid Method for Grid Impedance Estimation Based on Local Measurements
2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2018A new method for on-line grid impedance estimation is presented in the paper. It is based on an algorithm that requires no measurements from other buses. What is more, in normal operation it does not need to inject any current to the grid at the point of common coupling as it common in active methods for impedance estimation.
Michał Kosmecki, Robert Rink
openaire +1 more source
Transient-Responses-Based Grid Impedance Estimation for Grid-Forming Converters
2022 4th International Conference on Electrical Engineering and Control Technologies (CEECT), 2022Jianwen Sun +3 more
openaire +1 more source
2023 IEEE 2nd International Power Electronics and Application Symposium (PEAS), 2023
Fei Li +3 more
openaire +1 more source
Fei Li +3 more
openaire +1 more source
Grid Impedance Estimation with Large SCR Disturbances based on Grid-Forming Converter
Grid-Forming (GFM) converters face significant synchronization challenges when suddenly exposed to ultra-weak grid conditions, primarily due to the lack of prior knowledge about grid impedance. This paper proposes a passive method for estimating grid impedance during large disturbances caused by a substantial reduction in the grid short-circuit ratio ...Liu, Wentao +3 more
openaire +1 more source
Online grid impedance estimation for grid-connected inverters using APT-BMFO
Sustainable Energy Technologies and Assessments, 2023N. Palanisamy, Prawin Angel Michael
openaire +1 more source