Indirect Grid Current Control of LCL Filter based Grid-Connected Converter

Abstract

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.

Meeting Name

2019 IEEE Applied Power Electronics Conference and Exposition, APEC 2019 (2019: Mar. 17-21, Anaheim, CA)

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

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)

978-1-5386-8330-9

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Mar 2019

Link to Full Text

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