A skewness based method for diagnosis in quasi-Z T-type grid-connected converters

Tito G. Amaral; V. Fernao Pires; Armando Cordeiro; Daniel Foito

doi:10.1109/ICRERA47325.2019.8996558

A skewness based method for diagnosis in quasi-Z T-type grid-connected converters

Tito G. Amaral, V. Fernao Pires, Armando Cordeiro, Daniel Foito

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Citations (Scopus)

Abstract

One of the very interesting converters for transformerless grid-connected PV systems is the multilevel quasi-Z T-Type inverter. Besides their multilevel operation, it presents voltage Boost capability and robustness to instantaneous switching between power semiconductors of the same leg and capability to work in fault tolerant condition. However, to ensure this capability, it is essential to ensure a fast and correct diagnosis of the component under fault. Thus, this paper proposes a new method for the detection of an open switch fault. The proposed approach uses the inverter AC line currents that will be analyzed by a Skewness based method. The method has the capability to distinguish the switch under fault. Besides that, it presents robustness to interferences such as noise, as well is insensible to variations of the injected power into the grid. Several simulation and experimental results will be presented in order to verify the capability of the proposed method. 963478217

Original language	English
Title of host publication	8th International Conference on Renewable Energy Research and Applications, ICRERA 2019
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	131-136
Number of pages	6
ISBN (Electronic)	9781728135878
DOIs	https://doi.org/10.1109/ICRERA47325.2019.8996558
Publication status	Published - Nov 2019
Event	8th International Conference on Renewable Energy Research and Applications, ICRERA 2019 - Brasov, Romania Duration: 3 Nov 2019 → 6 Nov 2019

Conference

Conference	8th International Conference on Renewable Energy Research and Applications, ICRERA 2019
Country/Territory	Romania
City	Brasov
Period	3/11/19 → 6/11/19

Keywords

Fault detection and diagnosis
Grid-connected PV
Quasi-Z inverter (qZSI)
Skewness
T-Type

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/ICRERA47325.2019.8996558

Cite this

Amaral, T. G., Fernao Pires, V., Cordeiro, A., & Foito, D. (2019). A skewness based method for diagnosis in quasi-Z T-type grid-connected converters. In 8th International Conference on Renewable Energy Research and Applications, ICRERA 2019 (pp. 131-136). Article 8996558 Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ICRERA47325.2019.8996558

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title = "A skewness based method for diagnosis in quasi-Z T-type grid-connected converters",

abstract = "One of the very interesting converters for transformerless grid-connected PV systems is the multilevel quasi-Z T-Type inverter. Besides their multilevel operation, it presents voltage Boost capability and robustness to instantaneous switching between power semiconductors of the same leg and capability to work in fault tolerant condition. However, to ensure this capability, it is essential to ensure a fast and correct diagnosis of the component under fault. Thus, this paper proposes a new method for the detection of an open switch fault. The proposed approach uses the inverter AC line currents that will be analyzed by a Skewness based method. The method has the capability to distinguish the switch under fault. Besides that, it presents robustness to interferences such as noise, as well is insensible to variations of the injected power into the grid. Several simulation and experimental results will be presented in order to verify the capability of the proposed method. 963478217",

keywords = "Fault detection and diagnosis, Grid-connected PV, Quasi-Z inverter (qZSI), Skewness, T-Type",

author = "Amaral, {Tito G.} and {Fernao Pires}, V. and Armando Cordeiro and Daniel Foito",

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Amaral, TG, Fernao Pires, V, Cordeiro, A & Foito, D 2019, A skewness based method for diagnosis in quasi-Z T-type grid-connected converters. in 8th International Conference on Renewable Energy Research and Applications, ICRERA 2019., 8996558, Institute of Electrical and Electronics Engineers (IEEE), pp. 131-136, 8th International Conference on Renewable Energy Research and Applications, ICRERA 2019, Brasov, Romania, 3/11/19. https://doi.org/10.1109/ICRERA47325.2019.8996558

A skewness based method for diagnosis in quasi-Z T-type grid-connected converters. / Amaral, Tito G.; Fernao Pires, V.; Cordeiro, Armando et al.
8th International Conference on Renewable Energy Research and Applications, ICRERA 2019. Institute of Electrical and Electronics Engineers (IEEE), 2019. p. 131-136 8996558.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - A skewness based method for diagnosis in quasi-Z T-type grid-connected converters

AU - Amaral, Tito G.

AU - Fernao Pires, V.

AU - Cordeiro, Armando

AU - Foito, Daniel

N1 - UID/CEC/50021/2019 Sem PDF conforme despacho.

PY - 2019/11

Y1 - 2019/11

N2 - One of the very interesting converters for transformerless grid-connected PV systems is the multilevel quasi-Z T-Type inverter. Besides their multilevel operation, it presents voltage Boost capability and robustness to instantaneous switching between power semiconductors of the same leg and capability to work in fault tolerant condition. However, to ensure this capability, it is essential to ensure a fast and correct diagnosis of the component under fault. Thus, this paper proposes a new method for the detection of an open switch fault. The proposed approach uses the inverter AC line currents that will be analyzed by a Skewness based method. The method has the capability to distinguish the switch under fault. Besides that, it presents robustness to interferences such as noise, as well is insensible to variations of the injected power into the grid. Several simulation and experimental results will be presented in order to verify the capability of the proposed method. 963478217

AB - One of the very interesting converters for transformerless grid-connected PV systems is the multilevel quasi-Z T-Type inverter. Besides their multilevel operation, it presents voltage Boost capability and robustness to instantaneous switching between power semiconductors of the same leg and capability to work in fault tolerant condition. However, to ensure this capability, it is essential to ensure a fast and correct diagnosis of the component under fault. Thus, this paper proposes a new method for the detection of an open switch fault. The proposed approach uses the inverter AC line currents that will be analyzed by a Skewness based method. The method has the capability to distinguish the switch under fault. Besides that, it presents robustness to interferences such as noise, as well is insensible to variations of the injected power into the grid. Several simulation and experimental results will be presented in order to verify the capability of the proposed method. 963478217

KW - Fault detection and diagnosis

KW - Grid-connected PV

KW - Quasi-Z inverter (qZSI)

KW - Skewness

KW - T-Type

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BT - 8th International Conference on Renewable Energy Research and Applications, ICRERA 2019

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Y2 - 3 November 2019 through 6 November 2019

ER -

A skewness based method for diagnosis in quasi-Z T-type grid-connected converters

Abstract

Conference

Keywords

UN SDGs

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