Distribution System Fault Location Considering Voltage Sag Characteristics

2011 ◽  
Author(s):  
Tianwen Zheng ◽  
Xianyong Xiao ◽  
Ying Wang ◽  
Wenhai Zhang
Keyword(s):  
Distribution System ◽  
Fault Location ◽  
Voltage Sag

Evaluation of Voltage Sag Mitigation by Resonant Grounding Comparing to Existing Direct Grounding in Provincial Electricity Authority

2014 ◽  
Vol 492 ◽  
pp. 201-211
Author(s):  
S. Songsiri ◽  
S. Sirisumrannukul
Keyword(s):  
Computer Simulation ◽  
Distribution System ◽  
Laboratory Testing ◽  
Fault Location ◽  
Low Voltage ◽  
Voltage Sag ◽  
Distribution Transformer ◽  
Adjustable Speed Drive ◽  
The Cost ◽  
Technology Institute

This paper proposes a practical mitigation solution to the voltage sag problem by resonant grounding for a 22-kV distribution system of Provincial Electricity Authority (PEA) at the Patumthani 1 substation in Pathumthani province in Thailand. A computer simulation by ATP-EMTP was carried out to investigate the voltage sag impact at the low voltage side of the delta/wye distribution transformer connected at a fault location in the existing solidly grounded system and proposed resonant grounded system. The results indicate that the proposed resonant grounding can help all customers connected at the same bus survive from voltage sag problems and also keep the customers on the faulty feeder connected to the system being continuously supplied for single-to-ground faults. To evaluate the benefits of the resonant grounding, the different voltage-tolerance curves are proposed by Information Technology Institute Council (ITIC) curve and laboratory testing of Personel Computer (PC) curve, Programable Logig Coltroller (PLC) and Adjustable Speed Drive (ASD). The saving from the cost of customer interruption and voltage sag is calculated comparing between the existing solid grounding and the proposed resonant grounding with different voltage-tolerance curves

Support vector classification and regression for fault location in distribution system using voltage sag profile

2017 ◽  
Vol 12 (4) ◽  
pp. 519-526 ◽  
Author(s):  
Sophi Shilpa Gururajapathy ◽  
Hazlie Mokhlis ◽  
Hazlee Azil Bin Illias ◽  
Lilik Jamilatul Awalin
Keyword(s):  
Distribution System ◽  
Fault Location ◽  
Support Vector ◽  
Voltage Sag ◽  
Classification And Regression

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.

Practical Mitigation of Voltage Sag by Resonant Grounding in Distribution Systems: Case Study of Provincial Electricity Authority

2012 ◽  
Vol 433-440 ◽  
pp. 3974-3979 ◽  
Author(s):  
Somchai Songsiri ◽  
Sompon Sirisumrannukul
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Fault Location ◽  
Low Voltage ◽  
Circuit Breaker ◽  
Voltage Sag ◽  
Distribution Transformer ◽  
Useful Lifetime

This paper proposes a practical mitigation solution to the voltage sag problem by resonant grounding for a 22-kV distribution system of Provincial Electricity Authority (PEA). The simulation is carried out to investigate the voltage sag impact at the low voltage side of the delta/wye distribution transformer connected at the fault location in the existing solidly grounded system and proposed resonant grounded system by ATP-EMTP simulation. The results indicate that the proposed resonant grounding can help all customers connected at the same bus survive from voltage sag problems and also keep the customers on the faulty feeder connected to the system being continuously supplied. In addition, the distribution system with resonant ground lengthens the useful lifetime of the upstream circuit breaker of the feeder as its number of operations is significantly reduced.

Voltage-Sag-Profiles-Based Fault Location in High-Speed Railway Distribution System

2017 ◽  
Vol 53 (6) ◽  
pp. 5229-5238 ◽  
Author(s):  
Shu Zhang ◽  
Zhengyou He ◽  
Wei-Jen Lee ◽  
Ruikun Mai
Keyword(s):  
Distribution System ◽  
High Speed ◽  
Fault Location ◽  
Voltage Sag ◽  
High Speed Railway

Voltage Sag Data Utilization for Distribution Fault Location

2011 ◽  
Vol 26 (2) ◽  
pp. 1239-1246 ◽  
Author(s):  
Saeed Lotfifard ◽  
Mladen Kezunovic ◽  
Mirrasoul J. Mousavi
Keyword(s):  
Fault Location ◽  
Voltage Sag ◽  
Data Utilization

Voltage Sag Evaluation Method of a Real Distribution System Based on a Connection Number Model

2013 ◽  
Vol 341-342 ◽  
pp. 1363-1366
Author(s):  
Lang Bai ◽  
Le Yu
Keyword(s):  
Distribution System ◽  
Evaluation Method ◽  
Assessment Model ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Connection Number ◽  
Reliability Parameters ◽  
Real Distribution ◽  
System Components ◽  
Simulation Results

The evaluation results of power system are greatly influenced by the reliability parameters and uncertainty of system components. The connection number assessment model and an approach have been presented to assess the occurrence frequency due to voltage sags. The proposed method had been applied to a real distribution system. Compared with the interval number method, the simulation results have shown that this method is simple and flexible.

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