university of strathclyde department of electronic and electrical engineering
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University of Strathclyde Department of Electronic and Electrical Engineering 204, George Street, Glasgow G1 1XW, UK URL: www.eee.strath.ac.uk Email: [email protected] Tel: +44 (0)141 548 2587. - PowerPoint PPT PresentationTRANSCRIPT
1Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
2Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
University of StrathclydeDepartment of Electronic and Electrical Engineering204, George Street, Glasgow G1 1XW, UKURL: www.eee.strath.ac.uk Email: [email protected]: +44 (0)141 548 2587
This project has received assistance from the Proof of Concept Fund managed by Scottish Enterprise. The Proof of Concept Fund supports the pre-commercialisation of leading-edge technologies emerging from
Scotland's universities, research institutes and NHS Trusts.
3Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
SIEW Wah Hoon
SORAGHAN John
HOSABETTU Nandaraj
STEWART Martin
Automatic Fault LocationFor Underground Distribution Network
4Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
The Challenges
• Reflections from single phase and 3 phase tee-offs often lead to misinterpretations of actual fault.
• High level of interpretation skills are required to analyse TDR signals.
5Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
Network Schematic
Pulse Input 92m 43m
30m Branch
135m Main
R Y
B N
Fault at 18m from T
6Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
TDR Signals
50 100 150 200 250 300 35060
80
100
120
140
160
180
200TDR SIGNALS
Distance in Meters (m)
B-NY-N
7Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
The Technology
Signal Processing
Cable Characterisation
TDR Signal Acquisition
Fault Location
Fault Distance Display
8Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
Difference Error Vs. New Method
50 100 150 200 250 300 350-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
Distance in Meters (m)
Difference error Signal
Difference Method Fault:
79.1208
New Method Fault at:
110.2896
New Method Error SignalDifference Error Signal
9Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
Table of Performance
Substation Actual Fault Distance
Fault Distance by New Method
Accuracy
A 33.0m 33.0m 0.0m
B 45.0m 43.6m -1.4m
C 65.5m 63.5m -2.0m
D 10.8m 10.7m -0.1m
E 19.6m 20.1m 0.5m
10Author Dr WH Siew Country U.K Session 3 – Block 3.4.
Barcelona 12-15 May 2003
ConclusionsStrathclyde’s IFL Technology promises:
Reliable fault location
No requirement for skilled personnel on TDR interpretation
T-joint transparency