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Microsoft PowerPoint - TUES 8-B - Urban Electric System of the Future (AUDREY BRAZ).ppt [Compatibility Mode] 1
Third Generation
Third Generation
System of the Future
Consolidated Edison Company of New York
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Company Overview
Service Territory
Electric, gas, and steam regulated utility
Supplying New York City and Westchester County
Customers
3,100,000
Area
600 mi
2
Peak Demand
13,141 MW
(August 2006)
System Density
19.8 MW/mi
2
Urban Territory
Manhattan
Urban Area
23 mi
2
Urban Demand
5,437 MW
(July 2005)
Urban Density
221 MW/mi
2
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up to 2,000 MW/mi
2
Reliability Statistics (2006)
SAIFI per 1,000 customers 139
SAIDI
16.6 minutes
Entire System: 660 mi
2
New York City &
Westchester Country 2
Company Overview
Substations
Transmission
37
Sub-Transmission (Area)
57
Distribution Transformer Vaults
78,700
Distribution Transformer Vaults
78,700
System Voltages
Transmission
345kV, 500kV (1 circuit)
Sub-Transmission 138kV,
69kV
Primary Distribution
33kV, 27kV, 13kV, 4kV
Secondary Distribution
120/208V, 460V
Standard Area Substation Design
Five bank, double syn bus
65MVA transformers
32 primary distribution feeder positions (13kV)
138kV-13kV Manhattan Area
Substation
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p
y
p
(
)
60MVAR primary voltage capacitors (13kV)
Distribution Design Criteria
N-2 in high density
N-1 minimum throughout entire system
Low voltage distributed grid and spot networks
Transformer Louvers
Todays System Design
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System Design
Manhattan
24 area substations (138/13kV)
35 low voltage networks
from 50MW to 350MW each
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Demand Growth & Construction Steady projected
annual growth in
demand
Astor (under construction)
138kV /13kV substation
Astor (rendering)
Midtown Manhattan
demand Extensive
construction of
new transmission
and area
substations
Mott Haven (2007)
345kV / 138kV & 138/13kV substations
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required to meet
demand 4
System Progression
2G System Challenges
High cost of building and maintaining
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Low equipment utilization
Real estate scarcity and price
Increasing fault current
Under the Streets
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3G System of the Future Objectives Maintain reliability and customer service Increase asset utilization Reduce street congestion
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3G System of the Future Plan
International Benchmarking
Concept Development
Technology Development
Fi ld D
t ti
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Field Demonstrations
Implementation 6
International Benchmarking
Chicago, IL
Shanghai, China
16,680 MW peak
London, England
4,200 MW peak
Paris, France
3,200 MW peak
Berlin, Germany
2,450 MW peak
Tokyo, Japan
64,300 MW peak
Osaka, Japan
33,600 MW peak
New York, NY
13,141 MW peak
Chicago, IL
6,560 MW peak
Sydney
6,300 MW peak
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Hong Kong, China
7,820 MW peak
Hong Kong, China
2,560 MW peak
Singapore
5,620 MW peak
Asset Sharing &
Elimination of LV Grids
Asset Sharing &
Elimination of LV Grids
Underground / Over-Built
Underground / Over-Built
International Benchmarking Highlights
Multi-Function
Monitoring Systems
Condition Based
Maintenance
Multi-Function
Monitoring Systems
Condition Based
Maintenance
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Gas-Insulated Equipment
Gas-Insulated Equipment
Multi-Utility Tunnels
Multi-Utility Tunnels 7
3G System of the Future Concepts
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Substation Asset Sharing Maintain reliability with fewer
assets
assets Connect two area
substations together,
supplied by different
transmission sources Minimize the number of new
transformers required to
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transformers required to
meet demand growth 8
Implementing New Technology
Superconducting cable for inter-substation ties
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Medium voltage fast switch to transfer
distribution load
Fault current limiter to maintain superconductor
availability during a fault
Expanding AMI
Real time monitoring & control of distribution system
Automatically reconfigure
system during
ti
i
contingencies: Control secondary switches
for load transfer Locate faults and isolate
faulted feeder portions Diagnose network conditions
to prevent failures
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to prevent failures Optimize power flow to
minimize losses 9
Communication Challenges
in Dense Urban Area Wide range of customer density Diverse meter locations Vertical Urban meters on upper floors Horizontal Urban meters in basements
or sub basements Suburban meters outdoors
geographically dispersed Complex electric delivery system underground networks & overhead
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radial Advanced Metering Infrastructure (AMI)
feasibility in meshed low voltage
network system not yet fully proven Coordinate auto-loop switching with logic
control
Area
Substation
Smart 13kV Autoloop
control Implement greater sectionalizing
capability with programmable smart
SCADAmate switches Improve restoration time Reduce momentary outages
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New SCADAmate
Reclosers
Tie Recloser 10
Outlook on the System of the Future
Growing demand in NYC
3G System of the Future
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y
Continuing to
benchmark
with other utilities to share best practices
Sharing assets
to defer investment without compromising reliability
Implementing
new technology & communication systems
to enhance
system control and operational flexibility
Third Generation
Third Generation
System of the Future
Consolidated Edison Company of New York
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