Impedance Analysis of SOGI-FLL-Based Grid Synchronization

Hao Yi; Xiongfei Wang; Frede Blaabjerg; Fang Zhuo

doi:10.1109/TPEL.2017.2673866

Impedance Analysis of SOGI-FLL-Based Grid Synchronization

Hao Yi, Xiongfei Wang, Frede Blaabjerg, Fang Zhuo

Research output: Contribution to journal › Letter › peer-review

87 Citations (Scopus)

Abstract

The latest research has pointed out that the Phase-Locked Loop (PLL) plays an important role in shaping the impedance of grid-connected converters, yet most of the works so far merely focus on the synchronous reference-frame PLL. Alternatively, this letter presents the impedance analysis of the Second-Order Generalized Integrator Frequency-Locked Loop (SOGI-FLL), which has been introduced for realizing grid synchronization in the stationary reference frame. The influences of the voltage perturbation on the estimated phase and further on the output current are revealed for the grid-connected converter using the SOGI-FLL. The frequency coupling effect of the SOGI-FLL is also identified and verified in the experimental tests.

Original language	English
Journal	I E E E Transactions on Power Electronics
Volume	32
Issue number	10
Pages (from-to)	7409 - 7413
Number of pages	5
ISSN	0885-8993
DOIs	https://doi.org/10.1109/TPEL.2017.2673866
Publication status	Published - Oct 2017

Keywords

Phase-Locked Loop
Second-Order Generalized Integrator Frequency-Locked Loop
Impedance Analysis
Grid-Connected Converter

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10.1109/TPEL.2017.2673866

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HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems
Blaabjerg, F., Bak, C. L., Wang, X., Beres, R. N., Kwon, J., Gui, Y., Yoon, C. & Ebrahimzadeh, E.
European Research Counsil
01/02/2013 → 28/02/2018
Project: Research

Cite this

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title = "Impedance Analysis of SOGI-FLL-Based Grid Synchronization",

abstract = "The latest research has pointed out that the Phase-Locked Loop (PLL) plays an important role in shaping the impedance of grid-connected converters, yet most of the works so far merely focus on the synchronous reference-frame PLL. Alternatively, this letter presents the impedance analysis of the Second-Order Generalized Integrator Frequency-Locked Loop (SOGI-FLL), which has been introduced for realizing grid synchronization in the stationary reference frame. The influences of the voltage perturbation on the estimated phase and further on the output current are revealed for the grid-connected converter using the SOGI-FLL. The frequency coupling effect of the SOGI-FLL is also identified and verified in the experimental tests.",

keywords = "Phase-Locked Loop, Second-Order Generalized Integrator Frequency-Locked Loop, Impedance Analysis, Grid-Connected Converter",

author = "Hao Yi and Xiongfei Wang and Frede Blaabjerg and Fang Zhuo",

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PY - 2017/10

Y1 - 2017/10

N2 - The latest research has pointed out that the Phase-Locked Loop (PLL) plays an important role in shaping the impedance of grid-connected converters, yet most of the works so far merely focus on the synchronous reference-frame PLL. Alternatively, this letter presents the impedance analysis of the Second-Order Generalized Integrator Frequency-Locked Loop (SOGI-FLL), which has been introduced for realizing grid synchronization in the stationary reference frame. The influences of the voltage perturbation on the estimated phase and further on the output current are revealed for the grid-connected converter using the SOGI-FLL. The frequency coupling effect of the SOGI-FLL is also identified and verified in the experimental tests.

AB - The latest research has pointed out that the Phase-Locked Loop (PLL) plays an important role in shaping the impedance of grid-connected converters, yet most of the works so far merely focus on the synchronous reference-frame PLL. Alternatively, this letter presents the impedance analysis of the Second-Order Generalized Integrator Frequency-Locked Loop (SOGI-FLL), which has been introduced for realizing grid synchronization in the stationary reference frame. The influences of the voltage perturbation on the estimated phase and further on the output current are revealed for the grid-connected converter using the SOGI-FLL. The frequency coupling effect of the SOGI-FLL is also identified and verified in the experimental tests.

KW - Phase-Locked Loop

KW - Second-Order Generalized Integrator Frequency-Locked Loop

KW - Impedance Analysis

KW - Grid-Connected Converter

U2 - 10.1109/TPEL.2017.2673866

DO - 10.1109/TPEL.2017.2673866

M3 - Letter

SN - 0885-8993

VL - 32

SP - 7409

EP - 7413

JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

IS - 10

ER -

Impedance Analysis of SOGI-FLL-Based Grid Synchronization

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Keywords

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Projects

HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems

Cite this