Central Operations

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Effects of Cold Weather on the Con Edison Electric System:

Jan. & Feb. 2014

May 15, 2014

Central Operations

Winter 2013-2014

Central Park set a record low temperature for January 7th

– Low temperature of 4 degrees

– Previous record was set in 1896 (6 degrees)

This winter saw 13 days with snowfall above 1 inch

Dept. of Sanitation spread 456,000 tons of salt across NYC

– Most since 2008-2009 (409,000)

– High salt use drives distribution equipment impact

Central Operations

Winter 2013-2014

  December January February Winter Season Total

Average Temperature 38.5°F 28.6°F 31.6°F 32.9°F

Normal 37.5°F 32.6°F 35.3°F 35.1°F

Departure from Normal +1.0°F -4.0°F -3.7°F -3.2°F

Total Snow 8.6” 19.7” 29” 57.3”

Normal 4.8” 7” 8.8” 20.6”

Departure from Normal +3.8” +12.7” +20.2” +36.7”

*all data based on Central Park official climate station

Central Operations

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6,000

7,000

8,000

9,000

10,000

11,000

12,000

13,000

14,000

Con Edison Peak System LoadsJanuary & February, 2014

Con Ed Peak System Load Previous Peak (Winter) Previous 3-Yr Avg. Winter Peak All-Time Summer Peak

Previous 3-Yr Avg Peak: 8,655 MW

New All-Time Winter Peak: 9,063 MW

Previous Winter Peak: 8,950 MW

All-Time Summer Peak: 13,322 MW

Central Operations

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CECONY Summary

Overall the electric system performed very well

– Breaker and substation equipment had no significant issues

• No SF6 or compressed air issues

– Proactive discussions with NYISO and Con Ed Gas Control

– Zone J Power Plants

• Dual fuel burning capability was an asset

• Infrequency of use was evident initially

Implement Weather protocols

– Closely monitor predicted weather (Precip & Temps)

– Adjust staffing to assure proper coverage

– Restrict scheduled work to prevent contingencies

Central Operations

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Fuel Supply ChallengesHigh natural gas demand

Generators gas deliveries were not interrupted and no days where gas was not able to be scheduled

Oil was the more economical fuel for 27 days

Operators NYISO / Con Ed closely tracked fuel supplies.

Closely monitored Min Oil Burn requirements

Some GTs unavailable to the system

Liquid fuel challenges in late January

– Local inventory limited

– Longer lead times on delivery

– Limited barging available

Central Operations

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CECONY Summary

Steam Production

– No alerts or reserve issues

– Very close coordination with Con Ed Gas Control

– Fuel related concerns for contracted production

• Longer lead times securing additional inventory

• Barge availability was lower

– Con Ed owned steam system units

• Very closely coordinated barge deliveries between all sites

• Tide restrictions and additional tug boats needed due to ice in the river

• Overcame the challenges associated with the infrequency of burning oil

Central Operations

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Ideas for the future

Gather fuel inventory electronically

– Online inventory tool

– Weekly projections

Pre- Season Actions

– Demonstrate capability

• Liquid fuel use

• Auto swap if available

– Communicate

• Seasonal fuel supply

• Available inventory