scholarly journals Single-phase-to-ground fault model analysis of arc suppression coil grounding system in distribution network

2020 ◽  
Vol 605 ◽  
pp. 012002
Author(s):  
Zhang Xinyu ◽  
Nie Yu ◽  
Zhao Chuanzong ◽  
Du Wei ◽  
Wang Yanan ◽  
...  
Keyword(s):  
Single Phase ◽  
Distribution Network ◽  
Model Analysis ◽  
Fault Model ◽  
Grounding System ◽  
Ground Fault ◽  
Arc Suppression Coil

The Research Based on Zero Sequence Energy to the Line Selection in Distribution Network

2012 ◽  
Vol 614-615 ◽  
pp. 846-849
Author(s):  
Shu Tian ◽  
Jin Peng He ◽  
Yu Zheng
Keyword(s):  
Single Phase ◽  
Distribution Network ◽  
Power Network ◽  
Fault Line ◽  
Ground Fault ◽  
Arc Suppression Coil ◽  
Zero Sequence ◽  
Line Selection ◽  
Fault Lines ◽  
Resistance Component

When single phase-to-ground fault happened in power network with arc suppression coil grounded, capacitor current through fault point is compensated and reduced by installing arc suppression coil. Zero-sequence current’s amplitude and phase of fault lines and sound lines are so similar that it increases the difficulty of selecting the fault line. But the resistance component of zero sequence current has no relationship with the arc extinguishing coil compensation, absolute value of resistance component to the fault lines show the maximum, and zero sequence current’s polarity of fault lines is contrary to sound lines. In this paper, because of the characteristic of resistance component, a method is put forward based on zero sequence energy to the line selection in distribution network, it import auto-reclosing techniques into the line selection. The principle is verified by MATLAB simulator. It has high accuracy to select the fault line with this method.

Research on Single-Phase Grounding Fault in Distribution Networks with a DC Power Positioning Method

2014 ◽  
Vol 530-531 ◽  
pp. 353-356
Author(s):  
Run Sheng Li
Keyword(s):  
Power Distribution ◽  
Single Phase ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Distribution Network ◽  
Power Outage ◽  
Location Method ◽  
Fault Resistance ◽  
Ground Fault ◽  
Positioning Method

Due to the high ground fault resistance and the complexity of power distribution network structure (such as too many nodes, branches and too long lines), adopting common traveling wave method and ac injection method can not effectively locate the single-phase grounding fault in the distribution network system.To solve above problems and determine the position of the point of failure prisely, this paper adopted the dc location method of injecting the dc signal from the point of failure under the power outage offline. This paper introduces the single phase dc method and the method of three phase dc, and the simulation shows that the dc location method is effective and feasible.

The Simulation Platform of 10kV Distribution Network Based on PSCAD/EMTDC

2011 ◽  
Vol 354-355 ◽  
pp. 918-921
Author(s):  
Bo Xu ◽  
Jun Zhang ◽  
Xu Cai
Keyword(s):  
Laboratory Experiments ◽  
Power Grid ◽  
Distribution Network ◽  
Simulation Platform ◽  
Data Comparison ◽  
Ground Fault ◽  
Basic Framework ◽  
Arc Suppression Coil ◽  
Measurement Units ◽  
Ground Faults

This paper aims at constructing the 10kV distribution network simulation platform on the principle of the laboratory experiments. This project is done by using the PSCAD/EMTDC software and can simulate all kinds of ground faults in the power grid. The platform can be divided into two parts: the basic framework and the user-defined module. The basic framework includes powers, transformers, lines, control and measurement units. Meanwhile, the user-defined module contains a ground arc module, ground fault modules and arc suppression coil(ASC) modules et al. Furthermore, this paper describes several examples of the single-line-to-ground faults in the resonant grounded network. In the end, the validity of the simulation platform is confirmed by the data comparison with the laboratory experiments.

scholarly journals Single-phase-to-ground Fault Line Selection Method Based on STOA-SVM

2021 ◽  
Vol 2095 (1) ◽  
pp. 012029
Author(s):  
Yicen Liu ◽  
Xiaojiang Liu ◽  
Songhai Fan ◽  
Xiaomin Ma ◽  
Sijing Deng
Keyword(s):  
Single Phase ◽  
Distribution Network ◽  
Ensemble Empirical Mode Decomposition ◽  
Selection Method ◽  
Support Vector ◽  
Ground Fault ◽  
Mode Decomposition ◽  
Before And After ◽  
Zero Sequence ◽  
Line Selection

Abstract In view of the complex characteristics of nonlinearity and non-stableness of the zero-order current of each line after the single-phase ground fault of the distribution network, a distribution network fault selection method based on Sooty Tern Optimization Algorithm(STOA) and the combination of support vector machine is proposed. At first, the zero-sequence current before and after fault is obtained, then five kinds of IMFs including different components are obtained by ensemble empirical mode decomposition, and the energy entropy of the fault transient zero-sequence current is obtained by Hilbert transform, the results of training and testing are obtained by inputting the feature vector. The simulation results show that the accuracy of the proposed line selection model is 97.5%.

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