comed vernon hills meeting

North Region Reliability Engineering 1

Vernon Hills Reliability Update

October 18, 2011


Engineering Reliability Reviews

• Two-pronged approach to driving reliability reviews and “leading”engineers to problem areas

– Reliability reviews based on yearly performance• Per ICC, ComEd develops and reports on circuit SAIFI (frequency of outages)

i.e. where are current unfavorable trends

• ComEd develops statistics around three year average SAIFI numbers to identify chronic unfavorable trending on any circuits

– Reliability reviews based on “pocket area” information• ComEd has statistics and information on outages that are not “wide-spread” but

impact “pockets” of customers

• It is not uncommon to have a circuit that performs very well as a whole but does have pockets of customers that experience chronic outages

• In addition, ComEd utilizes feedback from village administration on “pocket area” issues – we want to hear about these so we can address them

North Region Reliability Engineering reviews data and information on approximately 1,800 circuits annually to address opportunities for improvements and corrective actions for the entire circuit or for pocket areas.

North Region Reliability Engineering reviews data and information on approximately 1,800 circuits annually to address opportunities for improvements and corrective actions for the entire circuit or for pocket areas.


Fuse

Fuse

FuseFuse

Transformer

X

“Pocket area”

Transmission Line/Substation

Main line ofcircuit

Substation circuit breaker

Engineering Reliability Reviews


System Performance Improvements

Trip saver: Fuse that will auto reset for transient faultsi.e. branch bounces off wire, fuse resets itself and avoids sustained outage

URD cable replacement: Cable that has shown unfavorable trends of performance and will be replaced in the same route as the old cable

Targeted Tree Trimming:

• Standard trimming – 10 foot zone in all directions around primary conductors for 12,000-volt and below circuits

• Targeted trimming – minimize over-hang, extend beyond standard zone above primary conductors, elimination of dead branches and “soft-wood” species


System Performance Improvements

Standard construction with bare conductors create a “canopy for tree branches

HENDRIX construction has covered conductors and reduces the “surface” footprint such not to provide a canopy for branches

Hendrix cable: A overhead installation of covered, bundled primary wire that can withstand tree branches and small tree contact


Vernon Hills – A6618Improvements include

• Installation of HENDRIX spacer cable A overhead installation of covered, bundled primary wire that can withstand tree branches and small tree contact. Proven to reduce outages by 75-85%.

Enhanced tree trimming willbe performed in this area

3500’ feet



Install 140A or 200A fuses with bypass disconnects to isolate all customers from tree outages down-stream


Additional fuse

Additional fuse


Vernon Hills – Feeder A6618Improvements include

• Installation of an automatic recloser to reduce outage exposure to customers due to tree related issues

Automaticreclosingdevice



• Replace URD cable

150’ feet

400’ feet



• Enhanced tree trimming on main line




• Replace underground cable in Hawthorne Center

400’ feet


Vernon Hills – A666YImprovements include

• Infrared inspect cable joints (splices) located in existing manholes to identify anomalies and make associated replacements as required

location of manholes

location of manholes


Vernon Hills – A668Improvements completed in 2010

• Replace underground cable and install new switchgear to provide switching flexibility to the mall

S

V

V

V

New switching cubicle

V


Vernon Hills – A668Improvements completed in 2010

• Replace underground cable (mainline)

S

S

S

S


Vernon Hills – A6628Improvements completed and in-progress

• Replace underground cable

replaced




replaced

in-progress


Vernon Hills – Distribution Automation

• Distribution Automation will serve approximately 4700 Vernon Hills customers (43% of the Village)

• One full-loop scheme is in service on feeders A6611/ C0923

• A second full-loop scheme will be livened by December 2011 on feeders A668/ A664

• A full loop scheme (in the engineering stage) on feeders A666Y/ A122, will be built in 2012

Circuit #1 Circuit #2

Substation Circuitbreaker

Substation Circuitbreaker

Automated switch #2(normally open)

Automated switch #1(normally closed)

Automated switch #3(normally closed)

Full-loop, bi-directional automation scheme


Smart Grid – Future Model

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PowerCo

12341234

PowerCo

Smart Grid will deliver enhanced reliability and create new opportunity for customer control of energy usage and spend

Smart Meter• Report usage by time• Report outages in

real-time• Remote disconnect• HAN gateway

Distributed Generation• Micro-generation• Solar• Wind• Net metering

Home area network• Real-time usage and

pricing statistics• Usage – aware

appliances

Delivery Automation, Sensors and Controls• Real-time reporting of

status and outages• Automated controls

of relays and reclosers

• Field force management

Transmission Sensors and Automation• Power factor

monitoring• Optimized switching of

capacitor banks

Data collection, processing and back office• Automated billing• Disconnection of

unoccupied / unpaid• Daily usage stats• Time of Use pricing


Vernon Hills