State-space control for LCL filters: Comparison between the converter and grid current measurements

F. M. Mahafugur Rahman; Jarno Kukkola; Ville Pirsto; Mikko Routimo; Marko Hinkkanen

doi:10.1109/ECCE.2019.8913204

State-space control for LCL filters: Comparison between the converter and grid current measurements

F. M. Mahafugur Rahman, Jarno Kukkola, Ville Pirsto, Mikko Routimo, Marko Hinkkanen

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Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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Abstract

This paper deals with discrete-time state-space current control of converters equipped with an LCL filter. Either the converter or grid current is measured and the unknown states are estimated using a reduced-order observer. These two current measurement options are compared by means of analysis and experiments under strong and weak grid conditions. To provide the basis for the comparison, equal reference-tracking performance is designed for both cases under strong grid conditions. In weak grids, the converter current measurement provides faster reference tracking, faster disturbance rejection, and better resonance damping in the case of the studied system where the LCL-filter resonance frequency is below the critical frequency.

Original language	English
Title of host publication	Proceedings of the 11th IEEE Energy Conversion Congress and Exposition, ECCE 2019
Publisher	IEEE
Pages	1491-1498
Number of pages	8
ISBN (Electronic)	978-1-7281-0395-2
DOIs	https://doi.org/10.1109/ECCE.2019.8913204
Publication status	Published - 29 Sept 2019
MoE publication type	A4 Conference publication
Event	IEEE Energy Conversion Congress and Exposition - Baltimore, United States Duration: 29 Sept 2019 → 3 Oct 2019 Conference number: 11

Publication series

Name	IEEE Energy Conversion Congress and Exposition
Publisher	IEEE
ISSN (Print)	2329-3721
ISSN (Electronic)	2329-3748

Conference

Conference	IEEE Energy Conversion Congress and Exposition
Abbreviated title	ECCE
Country/Territory	United States
City	Baltimore
Period	29/09/2019 → 03/10/2019

Keywords

Grid converter
LCL filter
Reduced-order observer
State-space current control
Weak grid

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10.1109/ECCE.2019.8913204

ELEC_Rahman_etal_State-Space-Control-for-LCL_ECCE_2019_authoracceptedmanuscriptAccepted author manuscript, 791 KB

Cite this

Rahman, F. M. M., Kukkola, J., Pirsto, V., Routimo, M., & Hinkkanen, M. (2019). State-space control for LCL filters: Comparison between the converter and grid current measurements. In Proceedings of the 11th IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 1491-1498). (IEEE Energy Conversion Congress and Exposition). IEEE. https://doi.org/10.1109/ECCE.2019.8913204

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title = "State-space control for LCL filters: Comparison between the converter and grid current measurements",

abstract = "This paper deals with discrete-time state-space current control of converters equipped with an LCL filter. Either the converter or grid current is measured and the unknown states are estimated using a reduced-order observer. These two current measurement options are compared by means of analysis and experiments under strong and weak grid conditions. To provide the basis for the comparison, equal reference-tracking performance is designed for both cases under strong grid conditions. In weak grids, the converter current measurement provides faster reference tracking, faster disturbance rejection, and better resonance damping in the case of the studied system where the LCL-filter resonance frequency is below the critical frequency.",

keywords = "Grid converter, LCL filter, Reduced-order observer, State-space current control, Weak grid",

author = "Rahman, {F. M. Mahafugur} and Jarno Kukkola and Ville Pirsto and Mikko Routimo and Marko Hinkkanen",

year = "2019",

month = sep,

day = "29",

doi = "10.1109/ECCE.2019.8913204",

language = "English",

series = "IEEE Energy Conversion Congress and Exposition",

publisher = "IEEE",

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booktitle = "Proceedings of the 11th IEEE Energy Conversion Congress and Exposition, ECCE 2019",

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note = "IEEE Energy Conversion Congress and Exposition, ECCE ; Conference date: 29-09-2019 Through 03-10-2019",

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Rahman, FMM, Kukkola, J, Pirsto, V, Routimo, M & Hinkkanen, M 2019, State-space control for LCL filters: Comparison between the converter and grid current measurements. in Proceedings of the 11th IEEE Energy Conversion Congress and Exposition, ECCE 2019. IEEE Energy Conversion Congress and Exposition, IEEE, pp. 1491-1498, IEEE Energy Conversion Congress and Exposition, Baltimore, Maryland, United States, 29/09/2019. https://doi.org/10.1109/ECCE.2019.8913204

State-space control for LCL filters: Comparison between the converter and grid current measurements. / Rahman, F. M. Mahafugur; Kukkola, Jarno; Pirsto, Ville et al.
Proceedings of the 11th IEEE Energy Conversion Congress and Exposition, ECCE 2019. IEEE, 2019. p. 1491-1498 (IEEE Energy Conversion Congress and Exposition).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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N2 - This paper deals with discrete-time state-space current control of converters equipped with an LCL filter. Either the converter or grid current is measured and the unknown states are estimated using a reduced-order observer. These two current measurement options are compared by means of analysis and experiments under strong and weak grid conditions. To provide the basis for the comparison, equal reference-tracking performance is designed for both cases under strong grid conditions. In weak grids, the converter current measurement provides faster reference tracking, faster disturbance rejection, and better resonance damping in the case of the studied system where the LCL-filter resonance frequency is below the critical frequency.

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KW - Weak grid

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State-space control for LCL filters: Comparison between the converter and grid current measurements

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