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author:

Gou, Moufa (Gou, Moufa.) [1] (Scholars:郭谋发) | Chen, Jingjie (Chen, Jingjie.) [2] | Zhang, Weijun (Zhang, Weijun.) [3] | Yang, Gengjie (Yang, Gengjie.) [4] (Scholars:杨耿杰) | Miao, Xiren (Miao, Xiren.) [5] (Scholars:缪希仁)

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EI Scopus PKU CSCD

Abstract:

A novel approach with active grounding is proposed to solve the problems of ground fault arc extinguishing and line detection for distribution networks. The single-phase cascaded H-bridge multi-level converter is connected to the neutral point in distribution networks directly. When the single phase ground fault occurs, a compensating current is injected to neutral point by multi-level converter, fully compensating the fault current and controlling the fault phase voltage to zero, thus extinguishing the fault arc. After a certain delay, the ground fault judgment is executed when the compensating current is reduced to zero. If permanent ground fault is determined, the line detection is carried out to identify fault line according to changes of compensating current and zero-sequence current before and after the multi-level converter exiting. The theoretical analysis and simulation results show that this method has the advantages of clear principle, easy implementation and good feasibility. ©, 2015, Power System Technology Press. All right reserved.

Keyword:

Bridge circuits Electric grounding Electric power distribution Fault detection Power converters

Community:

  • [ 1 ] [Gou, Moufa]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; Fujian Province; 350116, China
  • [ 2 ] [Chen, Jingjie]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; Fujian Province; 350116, China
  • [ 3 ] [Zhang, Weijun]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; Fujian Province; 350116, China
  • [ 4 ] [Yang, Gengjie]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; Fujian Province; 350116, China
  • [ 5 ] [Miao, Xiren]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; Fujian Province; 350116, China

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Source :

Power System Technology

ISSN: 1000-3673

CN: 11-2410/TM

Year: 2015

Issue: 9

Volume: 39

Page: 2677-2674

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 45

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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