Overall Short -Term / Long -Term Planning Objectives
Long-term Reliability Goals: (0-25 years)• Provide adequate substation capacity to support town load• Provide redundancy for all substations• Replace all open wires & bundled cables with Hendrix wires
Short-term Reliability Goals: (0-10 years)• Create engineering grade GIS System• Utilizing GIS, develop short/long term design plans• Provide proper protection and coordination of system protective
devices (i.e. Relays, Reclosers, Interrupters, Fuses, etc)• Back-up stranded loads (Folly Hill, Elliot street, Locust Street,
Summer street)• Upgrade substation underground getaways (Pond, Conant,
Hylands, etc)• Establish system wide power factor correction
Major Reliability Projects Completed
Year Project Cost
1996 4th Feeder 23 kV Construction $1,200,000
1997Preliminary Reliability Design and Initial
Development of GIS $850,000
1998 SCADA System $240,787
1999 North Street 23 kV Conversion $10,313
2000 S. Danvers Sub 42 & N Line Tap $1,692,018
2000 Summer Street 23 kV Conversion $343,526
2002 5th Feeder 23kV & 5kV $1,248,394
2003 Pond Street Substation Expansion $1,199,090
2005 Conant East & Elliott St. 23kV & 5kv $1,000,155
2005 GIS & SCADA Upgrade $102,000
2006/082007/2008
Cabot RD SubstationStation 39 Construction
$3,500,000$70,000
TOTAL COSTS: $11,456,283
Other Reliability Projects Completed
Upgraded Underground Utilities (2000-2005) Highland substation getaways Pond street substation getaways Conant street substation getaways Treetops underground distribution Schools underground services
Retired antiquated substations (1999-2001) Adams Street Burroughs Street
Upgraded 5 kV circuit backbones (2000-2008) Pickering street, Beaver Park, Summer street Worthington street Center street, Dayton Street, and West Street Pine Street Elliot Street Conant Street Liberty Street Burley St Foster St Cabot Rd RR R.O.W from Chestnut St to High School
Other Reliability Projects Completed
Upgraded secondary services & connections
Balanced load on 23 kV & 4.16 kV feeders
Installed 23 kV/4.16 kV step-down Xfmrs for stranded loads Seneca Dr/Lobao Dr/Strawberry Hill Lane Locust street beyond North Street Newbury Street extension Nike Site Elliot Street Folly Hill area Priston St Dayton Street Armory Rd
Installed 23 kV ckts New 2355 Feeder form sub 42 to Cherry Hill Summer Street North Street Burley St Cabot Rd
Constructed New 23 kV/ 4.16 Cabot Rd Substation
Reliability Programs - Finite
• Open Wire/Bundled Cable Replacement Program:
Replaced/Installed since 2000 Remaining:
5kV along 5th Feeder route miles 6.2 mi. 3-phase open wire 21.2 mi
Dayton/Green/Centre Streets 2.4 mi. Bundled cable 17 mi
Pine Street 1.5 mi. Total 38.2 mi
Pickering Ckt/Summer/North 3.8 mi
5 kV & 23 kV along Cabot & Burely-S3 CKT 2.4 mil
5 kV Cabot Rd to Chestnut St 0.7 mi
5 kV Cabot Rd to Cole Rd 0.6 mi
5 kV along Burley St-P2 0.9 m
Total 18.5 mi
• 23 kV/15 kV Padmount Switch Replacement
Replaced in 2005 Replaced for 2007 Planned for 2008 Chili's Restaurant Electronics Ave Endicott St Rosewood Industrial Park Friday’s Restaurant
• Inspection of OH/UG Devices (Infrared Scanning) ongoing
• Substation• OH Line Equipment
Reliability Programs - Finite
• Radio Controlled Sectionalizing
A) Benefits• Reduces the duration of outages during restoration activities• Features automatic sectionalizing• Features time delay / line tag for safety
B) How Many ? • Installed 8-23 kV ABB Reclosers• Installed 12-23 kV Gang Operated Air Break (GOAB) switches• Installed 8-23 kV Capacitor Banks
C) Where the new Reclosers will be installed?• Poplar Street• Electronics Ave• Rt 1 South• Collins Street RR tracks (2371 Line)
Reliability Programs - Continuous
• Tree Trimming: 3 year cycle
• Substation Testing: ongoing
• TLM – Transformer Load Management: ongoing
• Pole Inspection: ongoing
• 1009 poles upgraded since 2000
Distribution Automation
• Automatic Meter Reading (AMR/AMI)
• Automatic Power Restoral Scheme
• Automatic Power Factor Correction
• SCADA Control
• Outage Management System (OMS)
A1800 ALPHA Meter/Collector
AMR Mesh Network
Level 1
Level 1
Level 4
Level 3Level 2
Level 5
Level 2Level 3
Level 4
Level 4
Level 4
Level 1
Level 3
Public WANs
2008-2009 Capital Authorization Projects
Project 2008 2009
Wood Electric $1,200,000 $2919,692
Cabot Rd $200,000 ___
AMR $2,500,000 $200,000
Plains Park Lighting $224,741 $230,000
Station 39 $60,000 ___
Conant Sub $70,000 ___
Spacer Installation $350,000 $300,000
Traffic Signals $200,000 $200,000
Storage Facility $150,000 $1,100,000
Automation: Station 39 Construction
Project Owner: Niles
Tasks Completion Status
• Design 100%
• Equipment Bid Specification 100%
• Civil Construction 100%
• Equipment Installation & Testing 90%
Automation: Conant Sub Auto Transfer Scheme
Project Owner: Niles
Tasks Completion Status
• Design 100%
• Equipment Bid Specification 100%
• Civil Construction ----
• Equipment Installation & Testing ----
Plains park lighting
Project owner: Jay
Tasks Completion Status
• Design 100%
• Equipment Bid Spec In-Progress
• Equipment Order July/August 2008
• Construction March/April 2009
Major Reliability Projects 2008/2009
Year Project Cost
2008 Cabot Road Substation 100,000
2008 Hylands Substation Reconstruction-Station 39 70,000
2008/09 #2 Burroughs Street Storage Reconfiguration 1,096,000
2008 Wood Electric Substation Upgrade-Part 1 1,248,394
2009 Wood Electric Substation Upgrade-Part 2 2,940,000
2008 Conant Sub Auto transfer Scheme 70,000
2008/2009 Sub 42 capacity Study 100,000
TOTAL COSTS: $4,376,000
Cabot Road Substation
New 9/12/ 15MVA Substation.
Six (6) new 4.16 kV CKTs will enable Putnamville to be retired and provide substantial load relief to Conant Street Sub.
• SCADA Controlled Feeders allow remote switching from Engineering.
Cabot Rd Sub Load Transfer
CKT Date
Yacht Club (Old Elliot) 12/1/2007
Woodvale II 6/1/2008
Woodvale I 6/9/2008
Putnamville 7/7/2008
Burley Street (Conant East) 7/28/2008
Putnamville Sub Demolition Starts 9/30/ 2008
Wood Electric Substation Project Time Line
Preliminary Design & Planning Start 1/2007 Finish 9/2007
Land research
Survey
Zoning/Permitting/Conservation Com 6/2008
Planning: Industrial Zone-No permit required
• Conservation Commission:
• State Highway:
Design preparations Start 1/2008 Finish 6/2008
• Design Bid preparation and award
Design Finalization
Equipment Specification preparation
• Equipment Bid preparation and award – Transformer and 15kV Switchgear
Presentations 6/2008
• Municipal Light Board
• DPW Director/Town Manager
• Abutters
Wood Electric Substation Construction Time Line
Tree Trimming 4/01/2008
Substation Construction Start 9/2008 Finish 12/2008
• Phase 1 Transfer Load from 2420 line State hospital Load May 2008
• Danvers Industrial Park June/July 2008
• Phase 2 Preparation and Ground work September 2008
• Phase 2 Transformer Installation May 2009
• Phase 3 Switchgear Installation May 2009
• Phase 4 Relay Testing June 2009
• Phase 5 Functional Test July 2009
Wood Electric Substation Cost
Task
Engineering & Design $150,000
Site Surveying $20,660
Soil Testing $1,369
Transformers $1,760,000
Switchgear $880,000
Other equipment $100,000
Groundwork & oil containment $400,000
Installation of Station $150,000
Installation of OH/UG facilities $370,000
Fence, grounding and landscaping $150,000
Misc. equipment, fencing, landscaping & tree trimming $70,000
$4,052,029
Customer Satisfaction -Reliability Indices
• SAID – System wide outage duration
Outages affecting major circuit backbones
• CAID – Customer average outage duration
Outages affecting specific customers through lateral taps – localized storms, animal, and equipment failures
• SAIF – System wide outage frequency
Number of outages experienced by system
Reliability Indices
Sys Avg. Interrup Duration SAID = Cust hrs-out <1.2 (HRS) Cust served
Cust Avg. Interrup Duration CAID = Cust hrs out <1.3 (HRS) Cust Interrupted
System Avg. Interrup Freq SAIF = Cust interrupted < 1.12 (HRS) Cust served
Industry Standard Measures from Y2000/2005Industry Standard Measures from Y2000/2005Customer Satisfaction and System Customer Satisfaction and System PerformancePerformance
Acceptable Performance
Factors Influencing CAID - 2005
• Number of localized storms & Lightning
• Degree of storm damage
• Sustained pockets of outages due to equipment failure
• Single customer outages
• Sub 42’s load tap changer paralleling scheme failure
Reliability Indices
NE Area Averages
2001 2002 2003 2004 2005 2006 2007
SAID(Hrs)
<1.20 1.12 0.47 0.47 0.50 0.66 0.67 1.110.7
CAID(Hrs)
<1.3 1.14 1.49 0.89 0.73 1.31 1.01 1.301.21
SAIF <1.12 0.98 0.31 0.53 0.69 0.50 0.66 0.83.58
Note: Figures in red do not include major storms
Major Storms - 2007
• 6/21/2007 – 2365 Line – Lightning Strike on Purchase Street Damaged Insulators
• 7/28/2007 – 2420 Line– Lightning Strike on Route 1 Damaged Overhead Cable & Recloser
• 9/8/2007 – 2393 Line – Lightning Strike Tripped the Breaker at 20A Line Patrolled - Lightning Strike Suspected
Outage Causes 2002 - 2007
86
4
20
10
1
26
62
912
3 5 7
58
10 8 8
1
10
93
139
2 1 1
93
7
17
60
4
84
713
74 4
0
10
20
30
40
50
60
70
80
90
100
Equip. Failure Storms /Lightning
Tree Animal MV Accident Unknown
Cause of Incident
# o
f In
cid
ents
2002
2003
2004
2005
2006
2007
Breakdown of Equipment Failure 2007
8%
4%
19%
23% 4%4%
38%
Trans Fuse
Others
Secondary Cable
Line Fuse
OH Cable
Transformer
UG Cable
Project Description Normal Time OT AmountCabot Rd Sub 60 40 40,000Wood Electric Sub 60 40 20,000Coannt Sub 60 40 20,000Station 20A 50 50 15,000Substation Maintenance Backlog 70 30 10,000Distribution Maintenance ( Pole, Overloaded XFMR, etc) 60 40 16,000Recloser / Switch Installation 80 20 9,362Conant West Underground Getwaway Cables 90 10 8,000Town Lighting Project 70 30 10,000Emergency Responses ( weather, Storms, After Hours) 247,715Town Services 10,658Billable OT 21,424
Total 428,159
Conclusion
The Division received APPA’s RP3 Platinum Award (score of 98/100) on May 21, 2008 for its Reliability, Safety, and System Improvement programs. Electric Division has improved system performance since 1995 through employee commitments in positive work ethics, acceptance of new division procedures and policies, technical and customer service training, system ownership, increased productivity, and excellent design and maintenance standards.
ITS GOOD TO BE MORE THAN YOU ARTURNED ON TURNED OFF!
Thank you
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