Impedance modeling of virtual synchronous generator considering dead-band effect

Lijun Zhang; Wang Fei; Lintao Ren; Xinwei Xu; Jorge L.  Duarte

doi:10.1109/IECON.2019.8927298

Impedance modeling of virtual synchronous generator considering dead-band effect

Lijun Zhang, Wang Fei, Lintao Ren, Xinwei Xu, Jorge L. Duarte

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

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Abstract

The virtual synchronous generator (VSG) has been widely studied due to its ability in simulating synchronous generator. From the perspective of output impedance, the harmonic interaction between grid and VSG-based inverters are analyzed in this paper. Firstly, the dynamic response between the outer loop and the inner loop of the VSG is analyzed. It is found that the dynamic response of inner loop is much faster than that of the outer loop. Therefore, the VSG output impedance model neglecting outer loop is established, which reveals that there is still a harmonic resonance risk for the grid-connected inverter using the VSG control strategy. Secondly, considering the influence of the low-order harmonics generated by the dead-band effect on the grid-connected current, this paper establishes an accurate VSG model considering the dead-band effect. Based on the established VSG accurate model, the output impedance of the multi-VSGs cluster is derived. It is found that the output impedance decreases with the increase of the paralleled VSGs, and the dead-band effect has more obvious influence on the grid-connected current. Finally, the correctness of the proposed output impedance model of VSG is verified by simulation.

Original language	English
Title of host publication	Proceedings IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Pages	4727-4732
Number of pages	6
ISBN (Electronic)	9781728148786
ISBN (Print)	978-1-7281-4878-6
DOIs	https://doi.org/10.1109/IECON.2019.8927298
Publication status	Published - Oct 2019
Event	45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019 - Lisbon, Portugal Duration: 14 Oct 2019 → 17 Oct 2019 Conference number: 45

Conference

Conference	45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019
Abbreviated title	IECON 2019
Country/Territory	Portugal
City	Lisbon
Period	14/10/19 → 17/10/19

Keywords

dead-band effect
harmonic interaction
impedance modeling
virtual synchronous generator (VSG)

Access to Document

10.1109/IECON.2019.8927298

Cite this

@inproceedings{f1ce27eb7ebf45458aefc138d7be9064,

title = "Impedance modeling of virtual synchronous generator considering dead-band effect",

abstract = "The virtual synchronous generator (VSG) has been widely studied due to its ability in simulating synchronous generator. From the perspective of output impedance, the harmonic interaction between grid and VSG-based inverters are analyzed in this paper. Firstly, the dynamic response between the outer loop and the inner loop of the VSG is analyzed. It is found that the dynamic response of inner loop is much faster than that of the outer loop. Therefore, the VSG output impedance model neglecting outer loop is established, which reveals that there is still a harmonic resonance risk for the grid-connected inverter using the VSG control strategy. Secondly, considering the influence of the low-order harmonics generated by the dead-band effect on the grid-connected current, this paper establishes an accurate VSG model considering the dead-band effect. Based on the established VSG accurate model, the output impedance of the multi-VSGs cluster is derived. It is found that the output impedance decreases with the increase of the paralleled VSGs, and the dead-band effect has more obvious influence on the grid-connected current. Finally, the correctness of the proposed output impedance model of VSG is verified by simulation.",

keywords = "dead-band effect, harmonic interaction, impedance modeling, virtual synchronous generator (VSG)",

author = "Lijun Zhang and Wang Fei and Lintao Ren and Xinwei Xu and Duarte, \{Jorge L.\}",

year = "2019",

month = oct,

doi = "10.1109/IECON.2019.8927298",

language = "English",

isbn = "978-1-7281-4878-6",

pages = "4727--4732",

booktitle = "Proceedings IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society",

publisher = "Institute of Electrical and Electronics Engineers",

address = "United States",

note = "45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019, IECON 2019 ; Conference date: 14-10-2019 Through 17-10-2019",

}

Zhang, L, Fei, W, Ren, L, Xu, X & Duarte, JL 2019, Impedance modeling of virtual synchronous generator considering dead-band effect. in Proceedings IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society., 8927298, Institute of Electrical and Electronics Engineers, Piscataway, pp. 4727-4732, 45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019, Lisbon, Portugal, 14/10/19. https://doi.org/10.1109/IECON.2019.8927298

Impedance modeling of virtual synchronous generator considering dead-band effect. / Zhang, Lijun; Fei, Wang; Ren, Lintao et al.
Proceedings IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. Piscataway: Institute of Electrical and Electronics Engineers, 2019. p. 4727-4732 8927298.

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

TY - GEN

T1 - Impedance modeling of virtual synchronous generator considering dead-band effect

AU - Zhang, Lijun

AU - Fei, Wang

AU - Ren, Lintao

AU - Xu, Xinwei

AU - Duarte, Jorge L.

N1 - Conference code: 45

PY - 2019/10

Y1 - 2019/10

N2 - The virtual synchronous generator (VSG) has been widely studied due to its ability in simulating synchronous generator. From the perspective of output impedance, the harmonic interaction between grid and VSG-based inverters are analyzed in this paper. Firstly, the dynamic response between the outer loop and the inner loop of the VSG is analyzed. It is found that the dynamic response of inner loop is much faster than that of the outer loop. Therefore, the VSG output impedance model neglecting outer loop is established, which reveals that there is still a harmonic resonance risk for the grid-connected inverter using the VSG control strategy. Secondly, considering the influence of the low-order harmonics generated by the dead-band effect on the grid-connected current, this paper establishes an accurate VSG model considering the dead-band effect. Based on the established VSG accurate model, the output impedance of the multi-VSGs cluster is derived. It is found that the output impedance decreases with the increase of the paralleled VSGs, and the dead-band effect has more obvious influence on the grid-connected current. Finally, the correctness of the proposed output impedance model of VSG is verified by simulation.

AB - The virtual synchronous generator (VSG) has been widely studied due to its ability in simulating synchronous generator. From the perspective of output impedance, the harmonic interaction between grid and VSG-based inverters are analyzed in this paper. Firstly, the dynamic response between the outer loop and the inner loop of the VSG is analyzed. It is found that the dynamic response of inner loop is much faster than that of the outer loop. Therefore, the VSG output impedance model neglecting outer loop is established, which reveals that there is still a harmonic resonance risk for the grid-connected inverter using the VSG control strategy. Secondly, considering the influence of the low-order harmonics generated by the dead-band effect on the grid-connected current, this paper establishes an accurate VSG model considering the dead-band effect. Based on the established VSG accurate model, the output impedance of the multi-VSGs cluster is derived. It is found that the output impedance decreases with the increase of the paralleled VSGs, and the dead-band effect has more obvious influence on the grid-connected current. Finally, the correctness of the proposed output impedance model of VSG is verified by simulation.

KW - dead-band effect

KW - harmonic interaction

KW - impedance modeling

KW - virtual synchronous generator (VSG)

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U2 - 10.1109/IECON.2019.8927298

DO - 10.1109/IECON.2019.8927298

M3 - Conference contribution

SN - 978-1-7281-4878-6

SP - 4727

EP - 4732

BT - Proceedings IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

PB - Institute of Electrical and Electronics Engineers

CY - Piscataway

T2 - 45th Annual Conference of the IEEE Industrial Electronics Society, IECON 2019

Y2 - 14 October 2019 through 17 October 2019

ER -

Impedance modeling of virtual synchronous generator considering dead-band effect

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