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 location in an unbalanced distribution system using support vector classification and regression analysis

2017 ◽  
Vol 13 (2) ◽  
pp. 237-245 ◽  
Author(s):  
Sophi Shilpa Gururajapathy ◽  
Hazlie Mokhlis ◽  
Hazlee Azil Bin Illias ◽  
Ab Halim Abu Bakar ◽  
Lilik Jamilatul Awalin
Keyword(s):  
Regression Analysis ◽  
Distribution System ◽  
Fault Location ◽  
Support Vector ◽  
Classification And Regression

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

Fault location using mathematical analysis and database approach

2019 ◽  
Vol 38 (1) ◽  
pp. 415-430
Author(s):  
Sophi Shilpa Gururajapathy ◽  
Hazlie Mokhlis ◽  
Hazlee Azil Illias
Keyword(s):  
Mathematical Analysis ◽  
Distribution System ◽  
Distribution Systems ◽  
Fault Location ◽  
Research Work ◽  
Fault Analysis ◽  
Support Vector ◽  
Content Type ◽  
Adverse Weather ◽  
Continuous Power

PurposeThe purpose of this paper is to identify faults in distribution systems which are unavoidable because of adverse weather conditions and unexpected accidents. Hence, quick fault location is vital for continuous power supply. However, most fault location methods depend on the stored database for locating fault. The database is created by simulation, which is time consuming. Therefore, in this work, a comprehensive fault location method to detect faulty section and fault distance from one-ended bus using limited simulated data is proposed.Design/methodology/approachThe work uses voltage sag data measured at a primary substation. Support vector machine estimates the data which are not simulated. The possible faulty section is determined using matching approach and fault distance using mathematical analysis.FindingsThis work proposed a ranking analysis for multiple possible faulty sections, and the fault distance is calculated using Euclidean distance approach.Practical implicationsThe research work uses Malaysian distribution system as it represents a practical distribution system with multiple branches and limited measurement at primary substation. The work requires only metering devices to identify fault which is cost effective. In addition, the distribution system is simulated using real-time PSCAD by which the capability of proposed method can be fully tested.Originality/valueThe paper presents a new method for fault analysis. It reduces simulation time and storage space of database. The work identifies faulty section and ranks the prior faulty section. It also identifies fault distance using a mathematical approach.

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.

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