Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage

Yuanyuan Wu; Guangchen Liu; Guowei Chen; Qiang Yao; Jianwei Zhang; Guizhen Tian

doi:10.1109/CIEEC54735.2022.9845971

Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage

Yuanyuan Wu
, Guangchen Liu
, Guowei Chen
, Qiang Yao
, Jianwei Zhang
, Guizhen Tian

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

1 Citation (Scopus)

Abstract

As the actual grid voltage is not always balanced, the control strategy of the photovoltaic inverter will affect the quality of the current injected into the grid. The double closed-loop control strategy of the traditional PI controller is not effective in restraining the second-order harmonic fluctuation of inverter output power and grid current distortion under unbalanced grid voltage. This paper adopts a new type of sliding mode control (SMC) and this method does not need separation of positive- and negative-sequence current and decoupling control. By selecting the proportional-integral sliding surface of current error, the control accuracy of grid-connected current can be improved. The chattering issue can be alleviated by properly selecting the approaching law function of the sliding surface when the system tends to be stable. The control strategy of suppressing the negative sequence current is adopted to reduce the distortion of the grid-connected current. The proposed controller can improve the dynamic performance and insensitivity to external disturbances of the grid-connected inverter. The simulation results verify the effectiveness of the proposed strategy.

Original language	English
Title of host publication	Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	410-416
Number of pages	7
ISBN (Electronic)	9781665411042
DOIs	https://doi.org/10.1109/CIEEC54735.2022.9845971
Publication status	Published - 2022
Externally published	Yes
Event	5th IEEE International Electrical and Energy Conference, CIEEC 2022 - Nanjing, China Duration: 27 May 2022 → 29 May 2022

Publication series

Name	Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022

Conference

Conference	5th IEEE International Electrical and Energy Conference, CIEEC 2022
Country/Territory	China
City	Nanjing
Period	27/05/22 → 29/05/22

UN SDGs

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

SDG 7 Affordable and Clean Energy

Free Keywords

grid voltage imbalance
negative sequence current
second-order harmonic
SMC

ASJC Scopus subject areas

Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering

Access to Document

10.1109/CIEEC54735.2022.9845971

Cite this

Wu, Y., Liu, G., Chen, G., Yao, Q., Zhang, J., & Tian, G. (2022). Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage. In Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022 (pp. 410-416). (Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CIEEC54735.2022.9845971

Wu, Yuanyuan ; Liu, Guangchen ; Chen, Guowei et al. / Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage. Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022. Institute of Electrical and Electronics Engineers Inc., 2022. pp. 410-416 (Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022).

@inproceedings{680dd5cd46a04d6c992b4fd9bef7bc21,

title = "Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage",

abstract = "As the actual grid voltage is not always balanced, the control strategy of the photovoltaic inverter will affect the quality of the current injected into the grid. The double closed-loop control strategy of the traditional PI controller is not effective in restraining the second-order harmonic fluctuation of inverter output power and grid current distortion under unbalanced grid voltage. This paper adopts a new type of sliding mode control (SMC) and this method does not need separation of positive- and negative-sequence current and decoupling control. By selecting the proportional-integral sliding surface of current error, the control accuracy of grid-connected current can be improved. The chattering issue can be alleviated by properly selecting the approaching law function of the sliding surface when the system tends to be stable. The control strategy of suppressing the negative sequence current is adopted to reduce the distortion of the grid-connected current. The proposed controller can improve the dynamic performance and insensitivity to external disturbances of the grid-connected inverter. The simulation results verify the effectiveness of the proposed strategy.",

keywords = "grid voltage imbalance, negative sequence current, second-order harmonic, SMC",

author = "Yuanyuan Wu and Guangchen Liu and Guowei Chen and Qiang Yao and Jianwei Zhang and Guizhen Tian",

note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 5th IEEE International Electrical and Energy Conference, CIEEC 2022 ; Conference date: 27-05-2022 Through 29-05-2022",

year = "2022",

doi = "10.1109/CIEEC54735.2022.9845971",

language = "English",

series = "Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "410--416",

booktitle = "Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022",

address = "United States",

}

Wu, Y, Liu, G, Chen, G, Yao, Q, Zhang, J & Tian, G 2022, Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage. in Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022. Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022, Institute of Electrical and Electronics Engineers Inc., pp. 410-416, 5th IEEE International Electrical and Energy Conference, CIEEC 2022, Nanjing, China, 27/05/22. https://doi.org/10.1109/CIEEC54735.2022.9845971

Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage. / Wu, Yuanyuan; Liu, Guangchen; Chen, Guowei et al.
Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022. Institute of Electrical and Electronics Engineers Inc., 2022. p. 410-416 (Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022).

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

TY - GEN

T1 - Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage

AU - Wu, Yuanyuan

AU - Liu, Guangchen

AU - Chen, Guowei

AU - Yao, Qiang

AU - Zhang, Jianwei

AU - Tian, Guizhen

PY - 2022

Y1 - 2022

N2 - As the actual grid voltage is not always balanced, the control strategy of the photovoltaic inverter will affect the quality of the current injected into the grid. The double closed-loop control strategy of the traditional PI controller is not effective in restraining the second-order harmonic fluctuation of inverter output power and grid current distortion under unbalanced grid voltage. This paper adopts a new type of sliding mode control (SMC) and this method does not need separation of positive- and negative-sequence current and decoupling control. By selecting the proportional-integral sliding surface of current error, the control accuracy of grid-connected current can be improved. The chattering issue can be alleviated by properly selecting the approaching law function of the sliding surface when the system tends to be stable. The control strategy of suppressing the negative sequence current is adopted to reduce the distortion of the grid-connected current. The proposed controller can improve the dynamic performance and insensitivity to external disturbances of the grid-connected inverter. The simulation results verify the effectiveness of the proposed strategy.

AB - As the actual grid voltage is not always balanced, the control strategy of the photovoltaic inverter will affect the quality of the current injected into the grid. The double closed-loop control strategy of the traditional PI controller is not effective in restraining the second-order harmonic fluctuation of inverter output power and grid current distortion under unbalanced grid voltage. This paper adopts a new type of sliding mode control (SMC) and this method does not need separation of positive- and negative-sequence current and decoupling control. By selecting the proportional-integral sliding surface of current error, the control accuracy of grid-connected current can be improved. The chattering issue can be alleviated by properly selecting the approaching law function of the sliding surface when the system tends to be stable. The control strategy of suppressing the negative sequence current is adopted to reduce the distortion of the grid-connected current. The proposed controller can improve the dynamic performance and insensitivity to external disturbances of the grid-connected inverter. The simulation results verify the effectiveness of the proposed strategy.

KW - grid voltage imbalance

KW - negative sequence current

KW - second-order harmonic

KW - SMC

UR - https://www.scopus.com/pages/publications/85137332180

U2 - 10.1109/CIEEC54735.2022.9845971

DO - 10.1109/CIEEC54735.2022.9845971

M3 - Conference contribution

AN - SCOPUS:85137332180

T3 - Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022

SP - 410

EP - 416

BT - Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 5th IEEE International Electrical and Energy Conference, CIEEC 2022

Y2 - 27 May 2022 through 29 May 2022

ER -

Wu Y, Liu G, Chen G, Yao Q, Zhang J, Tian G. Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage. In Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022. Institute of Electrical and Electronics Engineers Inc. 2022. p. 410-416. (Proceedings of 2022 IEEE 5th International Electrical and Energy Conference, CIEEC 2022). doi: 10.1109/CIEEC54735.2022.9845971

Sliding Mode Control Strategy of Grid-Connected Inverter under Unbalanced Grid Voltage

Abstract

Publication series

Conference

UN SDGs

Free Keywords

ASJC Scopus subject areas

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