scholarly journals A new active method for ground fault location in small current grounding system

2018 ◽  
Author(s):  
Xiaojing Wang ◽  
Jiawei Xu ◽  
Jing Yong ◽  
Lulu Li
Keyword(s):  
Fault Location ◽  
Small Current ◽  
Grounding System ◽  
Active Method ◽  
Ground Fault

Feasibility Analysis of Tripping in Small Current Grounding System

2011 ◽  
Vol 130-134 ◽  
pp. 4240-4244
Author(s):  
Yi Shi Shu ◽  
Li Li Ma ◽  
Pei Jie Yu
Keyword(s):  
Low Voltage ◽  
Distribution Automation ◽  
Personal Safety ◽  
Small Current ◽  
Grounding System ◽  
Voltage Security ◽  
Integrated Automation ◽  
Ground Fault ◽  
Automation Systems ◽  
Automation Technology

With the development of integrated automation systems and distribution automation technology, considering the safety of grid equipment, the voltage security of low-voltage power grid, personal safety and the characteristics of small current grounding system , this paper points out that still follow the old rules that run 0.5-2 hours allowed in dealing with ground fault of small current grounding system is unreasonable, elaborates the new philosophy that the protection function of small current grounding should be distributed to the feeder protection device and implemented tripping. Theoretical analysis shows that the scheme is accurate, reliable, and highly practical.

A Survey on Single-Phase Faulty Line Selection Techniques for Small Current Grounding System in Medium-Voltage Grid

2014 ◽  
Vol 492 ◽  
pp. 407-411 ◽  
Author(s):  
Yin Tao ◽  
Yu Juan
Keyword(s):  
Single Phase ◽  
Development Trend ◽  
Small Current ◽  
Simulation Research ◽  
Grounding System ◽  
Medium Voltage ◽  
Fault Line Selection ◽  
Ground Fault ◽  
Line Selection ◽  
The Development Trend

Single-phase ground fault line selection problem has never been satisfactorily resolved in small current neutral grounding system in china. According to such a situation and combining theoretical analysis and simulation research with reports published in literature, existing faulty line selection technologies are generalized, and working principles, application conditions and existing defects of these technologies are analyzed, meanwhile the feasible improvement of these technologies and the up-to-date research achievements, and deficiencies of applications in this field are summarized. Finally, the development trend of faulty line selection technology for small-current neutral grounding system is pointed out.

Fault Line Selection Research on Single Phase Ground Fault of Small Current Grounding System Based on Wavelet Theory

2014 ◽  
Vol 513-517 ◽  
pp. 3552-3555
Author(s):  
Xiang Gao ◽  
Lu Wang
Keyword(s):  
Single Phase ◽  
Selection Criterion ◽  
Fault Line ◽  
Wavelet Theory ◽  
Small Current ◽  
Grounding System ◽  
Fault Line Selection ◽  
Ground Fault ◽  
Line Selection ◽  
Wavelet Transform Modulus Maximum

For the problem of single-phase ground fault line selection of small current grounding system, in this paper, according to the wavelet theory advantage processing capabilities of transient mutation signal ,line selection criterion based on wavelet transform modulus maximum principle of singularity detection is proposed . By analyzing the single-phase ground fault waveform of small current grounding system in the neutral point not effective grounding system, steady state and transient characteristics of fault occurs is obtained, building bus with three outlets of 10KV small current grounding system simulation model by using MATLAB software, and verifying the validity though a large number of simulation experiments on the method.

Sign in / Sign up

Export Citation Format

Share Document