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author:

Zheng, Feng (Zheng, Feng.) [1] (Scholars:郑峰) | Wu, Guojing (Wu, Guojing.) [2] | Lin, Xiangqun (Lin, Xiangqun.) [3] | Zheng, Song (Zheng, Song.) [4] (Scholars:郑松) | Wu, Xudong (Wu, Xudong.) [5] | Lin, Yanzhen (Lin, Yanzhen.) [6] | Deng, Changhong (Deng, Changhong.) [7]

Indexed by:

EI Scopus SCIE

Abstract:

Under weak-grid condition, the mismatch degree between grid impedance and inverter output impedance can increase, which will lead to inverter instability. Compared with conventional power grid, the parallel resonance of multi-inverter parallel system is more likely to happen. In order to improve inverter stability and suppress multiple-inverter parallel resonance under weak-grid condition, a new generalized control mode for control layer is proposed in this paper, which is based on finite set model predictive control (FCS-MPC) and inverse dynamic model control (IDM). The FCS-MPC with delay compensation is introduced into the current inner loop of the control layer, and the IDM control is introduced into the voltage outer loop, so as to make the transfer functions of current inner loop and voltage outer loop unitized and further reduce the order of the inverter's control system. Order reduction can improve the phase margin of the inverter output impedance, in other words, enhance inverter dynamic performance. Finally, the simulation model of multi-inverter parallel system is built, and by comparing with the traditional control strategies, the effectiveness of the proposed control strategy is verified.

Keyword:

Finite set model prediction Inverse model feedforward Multi -inverter parallel system Weak grid

Community:

  • [ 1 ] [Zheng, Feng]Fuzhou Univ, Sch Elect Engn & Automat, Fuzhou, Peoples R China
  • [ 2 ] [Wu, Guojing]Fuzhou Univ, Sch Elect Engn & Automat, Fuzhou, Peoples R China
  • [ 3 ] [Zheng, Song]Fuzhou Univ, Sch Elect Engn & Automat, Fuzhou, Peoples R China
  • [ 4 ] [Wu, Xudong]Fuzhou Univ, Sch Elect Engn & Automat, Fuzhou, Peoples R China
  • [ 5 ] [Lin, Xiangqun]State Grid Fujian Elect Power Co Ltd, UHV Co, Xiamen, Peoples R China
  • [ 6 ] [Lin, Yanzhen]State Grid Fuzhou Power Supply Co, Fuzhou, Peoples R China
  • [ 7 ] [Deng, Changhong]Wuhan Univ, Sch Elect Engn & Automat, Wuhan, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS

ISSN: 0142-0615

Year: 2023

Volume: 153

5 . 0

JCR@2023

5 . 0 0 0

JCR@2023

ESI Discipline: ENGINEERING;

ESI HC Threshold:35

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 6

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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