Tampere University of Technology

TUTCRIS Research Portal

MIMO-Identification Techniques for Rapid Impedance-based Stability Assessment of Three Phase Systems in DQ Domain

Research output: Contribution to journalArticleScientificpeer-review

Standard

MIMO-Identification Techniques for Rapid Impedance-based Stability Assessment of Three Phase Systems in DQ Domain. / Roinila, Tomi; Messo, Tuomas; Santi, Enrico.

In: IEEE Transactions on Power Electronics, Vol. 33, No. 5, 2018.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

APA

Vancouver

Author

Bibtex - Download

@article{e39e2bb2e7c84f999dac492fec8b9c57,
title = "MIMO-Identification Techniques for Rapid Impedance-based Stability Assessment of Three Phase Systems in DQ Domain",
abstract = "Grid impedance and the output impedance of grid-connected inverter are important parameters for the operation of grid-connected systems, such as solar, wind, and other distributed-generation resource systems. The impedance mismatch between the grid and the interfacing circuit often generates harmonic resonances that lead to reduced power quality and even instability. Since the impedances usually vary over time as a function of many parameters, online measurements are required for stability assessment and adaptive control of the inverters. Several methods have been proposed for quick, accurate measurements of impedances, but the use of multiple-input multiple-output (MIMO) identification techniques have not been considered. Applying the MIMO techniques, different components of the inverter output impedance or grid impedance can be simultaneously measured during a single measurement cycle. Therefore, the operating conditions of the system can be kept constant during the measurements, and the overall measurement time is significantly reduced. This paper shows the use of orthogonal binary sequences to simultaneously measure the d and q components of grid-connected inverter output impedance and/or grid impedance. Experimental results based on a three-phase grid-connected inverter are presented and used to demonstrate the effectiveness of the proposed methods.",
author = "Tomi Roinila and Tuomas Messo and Enrico Santi",
note = "EXT={"}Roinila, Tomi{"}",
year = "2018",
doi = "10.1109/TPEL.2017.2714581",
language = "English",
volume = "33",
journal = "IEEE Transactions on Power Electronics",
issn = "0885-8993",
publisher = "Institute of Electrical and Electronics Engineers",
number = "5",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - MIMO-Identification Techniques for Rapid Impedance-based Stability Assessment of Three Phase Systems in DQ Domain

AU - Roinila, Tomi

AU - Messo, Tuomas

AU - Santi, Enrico

N1 - EXT="Roinila, Tomi"

PY - 2018

Y1 - 2018

N2 - Grid impedance and the output impedance of grid-connected inverter are important parameters for the operation of grid-connected systems, such as solar, wind, and other distributed-generation resource systems. The impedance mismatch between the grid and the interfacing circuit often generates harmonic resonances that lead to reduced power quality and even instability. Since the impedances usually vary over time as a function of many parameters, online measurements are required for stability assessment and adaptive control of the inverters. Several methods have been proposed for quick, accurate measurements of impedances, but the use of multiple-input multiple-output (MIMO) identification techniques have not been considered. Applying the MIMO techniques, different components of the inverter output impedance or grid impedance can be simultaneously measured during a single measurement cycle. Therefore, the operating conditions of the system can be kept constant during the measurements, and the overall measurement time is significantly reduced. This paper shows the use of orthogonal binary sequences to simultaneously measure the d and q components of grid-connected inverter output impedance and/or grid impedance. Experimental results based on a three-phase grid-connected inverter are presented and used to demonstrate the effectiveness of the proposed methods.

AB - Grid impedance and the output impedance of grid-connected inverter are important parameters for the operation of grid-connected systems, such as solar, wind, and other distributed-generation resource systems. The impedance mismatch between the grid and the interfacing circuit often generates harmonic resonances that lead to reduced power quality and even instability. Since the impedances usually vary over time as a function of many parameters, online measurements are required for stability assessment and adaptive control of the inverters. Several methods have been proposed for quick, accurate measurements of impedances, but the use of multiple-input multiple-output (MIMO) identification techniques have not been considered. Applying the MIMO techniques, different components of the inverter output impedance or grid impedance can be simultaneously measured during a single measurement cycle. Therefore, the operating conditions of the system can be kept constant during the measurements, and the overall measurement time is significantly reduced. This paper shows the use of orthogonal binary sequences to simultaneously measure the d and q components of grid-connected inverter output impedance and/or grid impedance. Experimental results based on a three-phase grid-connected inverter are presented and used to demonstrate the effectiveness of the proposed methods.

U2 - 10.1109/TPEL.2017.2714581

DO - 10.1109/TPEL.2017.2714581

M3 - Article

VL - 33

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

SN - 0885-8993

IS - 5

ER -