A new control method for three phase inverters under unsymmetrical voltage sag conditions

Jiabin Shi, Liang Ji, Qiteng Hong, Yang Mi, Zhe Cao, Asif Khan, Campbell Booth

Research output: Contribution to conferencePaper

Abstract

Under grid fault conditions, especially the unbalanced grid faults, the PCC voltage of DG will suffer notably unbalanced voltage droops, which may cause the unnecessary disconnection of DGs according to the grid codes. Moreover, the overcurrent risk during voltage sag will also result in the disconnection of DGs, and even damage the inverter. In this paper, a new fault control strategy including three control objectives, was proposed to enhance the low-voltage ride-through (LVRT) capability for three-phase inverters. Firstly, the positive sequence (PS) voltage method is proposed to maximize the voltage support capability in any types of unbalanced voltage sags. As to ensure the safe operation of the inverter, a current limitation algorithm is designed based on different operation scenarios. Also, the active power delivery is considered as an ancillary service to fully use the capacity of the inverter. Then, a new control method towards the scenario classification and reference current selection is proposed to simultaneously achieve these control objectives. Finally, the simulation results based on MATLAB/Simulink are presented to verify the effectiveness of the proposed fault control strategy.

Conference

Conference8th International Conference on Advanced Power System Automation and Protection
Abbreviated titleAPAP2019
CountryChina
CityXi'an
Period21/10/1924/10/19
Internet address

Fingerprint

Electric potential
MATLAB

Keywords

  • fault control strategy
  • grid faults
  • voltage sag
  • inverter interfaced distributed generation
  • positive sequence (PS) voltage support

Cite this

Shi, J., Ji, L., Hong, Q., Mi, Y., Cao, Z., Khan, A., & Booth, C. (2019). A new control method for three phase inverters under unsymmetrical voltage sag conditions. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.
Shi, Jiabin ; Ji, Liang ; Hong, Qiteng ; Mi, Yang ; Cao, Zhe ; Khan, Asif ; Booth, Campbell. / A new control method for three phase inverters under unsymmetrical voltage sag conditions. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.5 p.
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abstract = "Under grid fault conditions, especially the unbalanced grid faults, the PCC voltage of DG will suffer notably unbalanced voltage droops, which may cause the unnecessary disconnection of DGs according to the grid codes. Moreover, the overcurrent risk during voltage sag will also result in the disconnection of DGs, and even damage the inverter. In this paper, a new fault control strategy including three control objectives, was proposed to enhance the low-voltage ride-through (LVRT) capability for three-phase inverters. Firstly, the positive sequence (PS) voltage method is proposed to maximize the voltage support capability in any types of unbalanced voltage sags. As to ensure the safe operation of the inverter, a current limitation algorithm is designed based on different operation scenarios. Also, the active power delivery is considered as an ancillary service to fully use the capacity of the inverter. Then, a new control method towards the scenario classification and reference current selection is proposed to simultaneously achieve these control objectives. Finally, the simulation results based on MATLAB/Simulink are presented to verify the effectiveness of the proposed fault control strategy.",
keywords = "fault control strategy, grid faults, voltage sag, inverter interfaced distributed generation, positive sequence (PS) voltage support",
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note = "8th International Conference on Advanced Power System Automation and Protection, APAP2019 ; Conference date: 21-10-2019 Through 24-10-2019",
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Shi, J, Ji, L, Hong, Q, Mi, Y, Cao, Z, Khan, A & Booth, C 2019, 'A new control method for three phase inverters under unsymmetrical voltage sag conditions' Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China, 21/10/19 - 24/10/19, .

A new control method for three phase inverters under unsymmetrical voltage sag conditions. / Shi, Jiabin; Ji, Liang; Hong, Qiteng; Mi, Yang ; Cao, Zhe; Khan, Asif; Booth, Campbell.

2019. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.

Research output: Contribution to conferencePaper

TY - CONF

T1 - A new control method for three phase inverters under unsymmetrical voltage sag conditions

AU - Shi, Jiabin

AU - Ji, Liang

AU - Hong, Qiteng

AU - Mi, Yang

AU - Cao, Zhe

AU - Khan, Asif

AU - Booth, Campbell

PY - 2019/10/21

Y1 - 2019/10/21

N2 - Under grid fault conditions, especially the unbalanced grid faults, the PCC voltage of DG will suffer notably unbalanced voltage droops, which may cause the unnecessary disconnection of DGs according to the grid codes. Moreover, the overcurrent risk during voltage sag will also result in the disconnection of DGs, and even damage the inverter. In this paper, a new fault control strategy including three control objectives, was proposed to enhance the low-voltage ride-through (LVRT) capability for three-phase inverters. Firstly, the positive sequence (PS) voltage method is proposed to maximize the voltage support capability in any types of unbalanced voltage sags. As to ensure the safe operation of the inverter, a current limitation algorithm is designed based on different operation scenarios. Also, the active power delivery is considered as an ancillary service to fully use the capacity of the inverter. Then, a new control method towards the scenario classification and reference current selection is proposed to simultaneously achieve these control objectives. Finally, the simulation results based on MATLAB/Simulink are presented to verify the effectiveness of the proposed fault control strategy.

AB - Under grid fault conditions, especially the unbalanced grid faults, the PCC voltage of DG will suffer notably unbalanced voltage droops, which may cause the unnecessary disconnection of DGs according to the grid codes. Moreover, the overcurrent risk during voltage sag will also result in the disconnection of DGs, and even damage the inverter. In this paper, a new fault control strategy including three control objectives, was proposed to enhance the low-voltage ride-through (LVRT) capability for three-phase inverters. Firstly, the positive sequence (PS) voltage method is proposed to maximize the voltage support capability in any types of unbalanced voltage sags. As to ensure the safe operation of the inverter, a current limitation algorithm is designed based on different operation scenarios. Also, the active power delivery is considered as an ancillary service to fully use the capacity of the inverter. Then, a new control method towards the scenario classification and reference current selection is proposed to simultaneously achieve these control objectives. Finally, the simulation results based on MATLAB/Simulink are presented to verify the effectiveness of the proposed fault control strategy.

KW - fault control strategy

KW - grid faults

KW - voltage sag

KW - inverter interfaced distributed generation

KW - positive sequence (PS) voltage support

M3 - Paper

ER -

Shi J, Ji L, Hong Q, Mi Y, Cao Z, Khan A et al. A new control method for three phase inverters under unsymmetrical voltage sag conditions. 2019. Paper presented at 8th International Conference on Advanced Power System Automation and Protection, Xi'an, China.