Indirect Grid Current Control of LCL Filter based Grid-Connected Converter
This paper presents a method to indirectly control the grid current of a grid connected converter interfaced with a LCL filter. The proposed method is based on estimating the fundamental and harmonic components of the current drawn by the filter capacitor. The estimated fundamental and harmonic components of the filter capacitor current are then compensated by injecting an equal amount of current from the converter side using a well-designed current controller. This indirectly ensures the grid current to be at the desired power factor and immune to any distortions in the grid voltage. The proposed estimation and control scheme is verified by experimental results.
S. Mukherjee et al., "Indirect Grid Current Control of LCL Filter based Grid-Connected Converter," Proceedings of the 2019 IEEE Applied Power Electronics Conference and Exposition (2019, Anaheim, CA), pp. 3024-3031, Institute of Electrical and Electronics Engineers (IEEE), Mar 2019.
The definitive version is available at https://doi.org/10.1109/APEC.2019.8721834
2019 IEEE Applied Power Electronics Conference and Exposition, APEC 2019 (2019: Mar. 17-21, Anaheim, CA)
Electrical and Computer Engineering
Intelligent Systems Center
Keywords and Phrases
Electric current control; Harmonic analysis; Power electronics; Grid-connected converters; Harmonic compensation; LCL filters; Sensor less control; Voltage estimation; Power converters; Grid connected converter
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Mar 2019