Consolidated Edison Stray Voltage...
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ON IT 1 Consolidated Edison Stray Voltage Program Stuart Hanebuth Consolidated Edison Co. of NY, Inc.
Transcript of Consolidated Edison Stray Voltage...
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Consolidated EdisonStray Voltage Program
Stuart Hanebuth
Consolidated Edison Co. of NY, Inc.
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Con Edison Service TerritoryCon Edison Company of NY
NYC and WestchesterArea: 660 sq. mi. (Elec & Gas)Population: 9.1million 3.1 million electric
customers13,141 MW 2006
PeakIn some areas,
Load Density up to 2000 MW per Sq Mile
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Stray Voltage Mitigation Strategy
• Testing• Inspection• Systems approach to safety• Research and Development Initiatives• Stakeholder Communications• Future Challenges
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Electric Shock Reports (ESR)
210
11689
46
75
114
99
87
8148
2113
21
0
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40
60
80
100
120
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2004 2005 2006 2007 2008 2009
C o n Ed ison N o n- C o n Ed iso n Pro ject ed
Big PictureEnergized Equipment (ENE)
1133 10951390
22012671
1964
966 1183
1753
32262863
2910
526
0
400
800
1200
1600
2000
2400
2800
3200
3600
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4400
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5200
5600
2004 2005 2006 2007 2008 2009
C on Ed ison N o n- C on Ed ison Pro ject ed
20992278
3143
5427 5534
5,266 12,834 22,592 57,208Frequency of scans in
mileage
0
5400285
230
188
133
94 90
43,026
4874
69
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Manual Testing Program
• 2009 Manual Testing–183,000 underground structures–285,000 overhead poles–130,000 streetlights
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Mobile Stray Voltage Testing Program
• Annual goal is to complete 12 scans of our underground system goal between April 1, 2009 – March 31, 2010
• Eliminated the need to manually test 144,000 objects
• Testing is conducted 5 nights per week
• 14 vehicles per night
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Results of mobile testing
• Mobile Program tests entire landscape rather than discrete objects
• More than 45% of detections are on items that would not be tested during manual testing
Stray Voltage Location
Percentage of total
detections (2009)
Traffic Lights 26.63%
Street Lights 19.28%
Sidewalk 16.80%
Fence 8.52%
Customer Equipment 6.40%
Gate 3.65%
Con Edison Manhole 3.50%
Non-Con Edison Manhole 3.02%
Fire Hydrant 1.91%
Gas Cap 1.73%
Street Signs 1.46%
Scaffolding 1.40%
Metal Door 1.34%
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Facility Inspection Program• Currently in final year of five year inspection cycle
– 282,000 Overhead structures
– 286,000 Underground structures
• Preventative program
• Requires detailed visual examination of facilities and its equipment.
• Test for stray voltage conducted at the beginning and end of each inspection.
• Deficiencies identified during inspections are prioritized for repair in four levels.
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Systems Approach to Safety
• Cable replacement program
• Composite cover program
• Streetlight Isolation Transformer Installations
• Vented manhole and service box cover programs
• Transformer reliability programs
• Periodic System Safety Meetings
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Research and Development
• EPRI personal arc fault detector– Portable device
– Intended for crews to use in manholes while performing work
– Possible mobile application
• Texas A&M network arc fault monitor– Online system
– Data collection and analysis ongoing
• Advanced Stray Voltage Detection initiative
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• Annual Jodie S. Lane Conference (NYC)• IEEE – Working Group Meetings • NYC Department of Buildings• NYC Department of Transportation• Other municipal stakeholders• Community Board Presentations• Employee awareness• NYPD • FDNY
Stakeholder Communications
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Future Challenges
• Identify methods to deploy mobile detectors more effectively
• Develop models to evaluate inspection and testing cycles to ensure that they are optimized
• Collect and analyze harmonic data to better understand failure modes
• Continue to invest in the development of new mobile detection technology
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Questions
