@inproceedings{6de26b14b09e4b91ae571ba9c9ec647c,
title = "Grid-voltage-feedforward active damping for grid-connected inverter with LCL filter",
abstract = "For the grid-connected voltage source inverters, the feedforward scheme of grid voltage is commonly adopted to mitigate the current distortion caused by grid background voltages harmonics. This paper investigates the grid-voltage-feedforward active damping for grid connected inverter with LCL filter. It reveals that proportional feedforward control can not only fulfill the mitigation of grid disturbance, but also offer damping effects on the LCL filter resonance. Digital delays are intrinsic to digital controlled inverters; with these delays, the feedforward control can be equivalent to a damping resistor and a reactance paralleled with filter capacitor. The damping performance in different frequency regions are discussed through Bode diagrams. Compared to other widely used active damping strategies, no extra sensor is needed because the Point of Common Coupling (PCC) voltage is sampled for Phase Locked Loop (PLL). Simulation and experiment results are provided for verifying the theoretical analyses.",
keywords = "Digital time delay, feedforward, grid-connected inverter, LCL filter, resonance damping",
author = "Minghui Lu and Xiongfei Wang and Frede Blaabjerg and Muyeen, {S. M.} and Ahmed Al-Durra and Siyu Leng",
note = "Publisher Copyright: {\textcopyright} 2016 IEEE.; 31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 ; Conference date: 20-03-2016 Through 24-03-2016",
year = "2016",
month = may,
day = "10",
doi = "10.1109/APEC.2016.7468134",
language = "British English",
series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "1941--1946",
booktitle = "2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016",
address = "United States",
}