Research on pilot protection for single phase to ground fault in low resistance ground active distribution network

After the multi-distributed generation is incorporated into the distribution network with small resistance grounding at the neutral point, the system structure of the distribution network will change, and the reliability of the original single-phase grounding protection will be greatly affected. Bas...

Full description

Saved in:
Bibliographic Details
Published in2021 China Automation Congress (CAC) pp. 3950 - 3955
Main Authors Wu, Na, Mu, Jiayao, Fan, Shuxian
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.10.2021
Subjects
distributed generators
Distribution networks
Grounding
low resistance grounding system
Measurement uncertainty
Resistance
Sensitivity
single phase grounding protection
Voltage measurement
Voltage transformers
Online AccessGet full text

Cover

More Information
Summary:After the multi-distributed generation is incorporated into the distribution network with small resistance grounding at the neutral point, the system structure of the distribution network will change, and the reliability of the original single-phase grounding protection will be greatly affected. Based on the typical structure of small resistance grounding distribution network with multi-distributed generation, this paper analyzes the fault characteristics of zero sequence current at both ends of the protected area section when single-phase grounding fault occurs, and proposes a longitudinal protection scheme based on the phase relationship of zero sequence current according to the fault characteristics. The protection scheme effectively solves the problem of misoperation of single-phase grounding protection in traditional small resistance grounding distribution network after multi-distributed generation is connected to the grid.
ISSN:2688-0938
DOI:10.1109/CAC53003.2021.9728650