The Summary of the Fault Location in Distribution Network

2013 ◽  
Vol 811 ◽  
pp. 685-688
Author(s):  
You Jie Ma ◽  
Pan Long Jin ◽  
Xue Song Zhou
Keyword(s):  
Fault Location ◽  
Short Circuit ◽  
Distribution Network ◽  
Fault Type ◽  
Location Methods ◽  
Short Circuit Fault ◽  
At Home

Various fault location methods for distribution network at home and abroad are summarized. According to the fault type,the location methods for short circuit fault and earthed fault are introduced. And the basic theories, characteristics, improvement and applications of the representative methods are analyzed. The main problems in the applications of these methods are analyzed. In view of these questions, users requirements and the development of distribution network, the improvement and research about fault location technical are proposed preliminarily.

Fault Section Location in Distribution Network with DG Based on Voltage Sag Correlation Coefficient

2013 ◽  
Vol 787 ◽  
pp. 902-908 ◽  
Author(s):  
Xin Du ◽  
Min Fang Peng ◽  
Hong Mei Zeng ◽  
Liang Zhu ◽  
Hong Wei Che ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Distribution System ◽  
Fault Location ◽  
Short Circuit ◽  
Distribution Network ◽  
Voltage Sag ◽  
Search Range ◽  
Actual Distribution ◽  
Measuring Devices ◽  
Short Circuit Fault

A fault location method based on correlation coefficient was proposed in the paper for the distribution system with distributed generation (DG). At first, by acquiring the Thevenin equivalent parameters of each DG to establish simulation model of the actual distribution network. Then voltage sag feature vectors of each bus would be obtained by simulating short-circuit fault at the location of each bus, respectively. Afterwards, by calculating and analyzing the correlation coefficient between each bus and the actual fault node,, suspicious fault sections can be determined. Finally, the fault section was identified by utilizing the associated node of every suspicious fault section .The method could reduce the fault search range obviously, without a massive requirement of measuring devices, and the required data can be obtained easily. Simulation results of a 10kV distribution network with DG showed that the proposed method was accuracy and effective.

Short-Circuit Fault Location Interval Recognition Criteria in Electrical System

2019 ◽  
Vol 11 ◽  
pp. 33-39
Author(s):  
Yury Ya. LYAMETS ◽  
◽  
Mikhail V. MARTYNOV ◽  
Alexander N. MASLOV ◽  
◽  
...  
Keyword(s):  
Fault Location ◽  
Short Circuit ◽  
Electrical System ◽  
Short Circuit Fault

scholarly journals Online Estimation of Short-Circuit Fault Level in Active Distribution Network

2020 ◽  
Vol 10 (11) ◽  
pp. 3812
Author(s):  
Xiaohui Wang ◽  
Peng Wang ◽  
Yunbo Wang ◽  
Fang Shi
Keyword(s):  
Equivalent Circuit ◽  
Short Circuit ◽  
Distribution Network ◽  
Estimation Method ◽  
Short Circuit Current ◽  
Distribution Networks ◽  
Measurement Unit ◽  
Online Estimation ◽  
Active Distribution Network ◽  
Short Circuit Fault

The potential short-circuit current in active distribution network features time-variance with the increasing distributed generations. This feature makes the online estimation of fault level necessary. In this paper, a novel online estimation method is proposed to be implemented by either phasor measurement unit (PMU) or the measurements from protection relays. The equivalent circuit of the radial distribution network with distributed generators (DGs), e.g., wind turbines and photovoltaic cells, is derived with necessary simplifications. The natural disturbances downstream are used to evaluate the parameters of the equivalent circuit so that the potential fault level can be estimated in advance of the actual fault occurrence. A fuzzy logic identifier is presented to rank the confidence of the measurements incurred by the disturbance and to distinguish the qualified disturbance to launch the estimation. The mechanism based on multi-measurements and confidence indices was applied, to improve the accuracy. A typical distribution network in the United Kingdom (UK) with DGs was taken, as an example, to validate the proposed method under various load fluctuation. The results confirm the effectiveness of the proposed method, which is suitable for online estimation of short-circuit fault level in active distribution networks.

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