IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... –...

35
System Modernization and Reliability Project (SMRP ) Presenter: Michael Smalley, principal engineer – WEC Energy Group Co-authors: Steven Schott, Ross Barrette, Michael Smalley IEEE ICC Education Session Oct. 23, 2019

Transcript of IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... –...

Page 1: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System Modernization and

Reliability Project (SMRP)

Presenter: Michael Smalley, principal engineer – WEC Energy GroupCo-authors: Steven Schott, Ross Barrette, Michael Smalley

IEEE ICC Education SessionOct. 23, 2019

Page 2: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System information

• 446,000 electriccustomers

• 98% of electricalsystem is 24.9 kV

• ASCC: 3,600 amps,RMS, Sym.

1

Page 3: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Project background

2

Page 4: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SAIDI comparisons

6-year SAIDI average (336.39)was higher than averages of otherstate utilities over the same period(160.17 minutes)

3

Page 5: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Customers that experience an outage bynumber of outage events per year

Outage comparisons by territory

• 33,167 customers (7.6%)experienced an average of5+ outages per year

• 72% of those outages were locatedin high density forest areas

• 5,413 customers (1.2%)experienced an average of10+ outages per year

• 90% of those outages were locatedin high density forest areas

4

Page 6: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Lines to be replaced

• Distribution feeders are radial

• Typical 24.9 kV distribution feeder in rural areas canrun up to 50 circuit miles in one direction

• Advantages– Fewer substations

– Improved voltage profile

– Fewer losses

• Disadvantages– Longer radial lines

5

Page 7: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SMRP Phase 1

• Optimize performance and cost

• Reliability improvement of 25%

• Move from 3rd/4th quartile to 2nd

quartile

• Add distribution automation –400 miles

• Replace overhead primarydistribution with underground,focus on areas and feederswith the worst SAIDI (1,000 to1,200 miles over 5 years)

• Total project cost $218 million

• Construction in 2014-2018

6

Page 8: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SMRP Phase 2

• Additional 960 miles underground

• No distribution automation

• Reliability improvement of 17%

• Project cost $211.5 million

• Construction in 2018-2021

• Yes, we’re in Phase 2 already!

7

Page 9: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Project cycle

Begin to contact customers andgauge overall interest in project

Begin field design, asset collectionand construction print creation

8

Staking and construction

Identify and prioritizeoverhead circuits that wouldprovide maximum reliabilitybenefit for cost investment

Environmental walk-throughs

General permittingand applications

Send out easement drawings to customersand begin to acquire necessary easements

Complete as-builtsand update GIS

Removal of existingoverhead facilities

Page 10: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Project challenges

9

9

• Safety

• Customer communications

• Easement obtainment

• No locates for design

• Environmental constraints

• Weather – local andnationwide

• Other in-ground facilities

• Rock

• Availability of skilled workforce

• Contractors performingenergization and cutovers

• Installation quality (PD testing)

• Indian reservation construction

Page 11: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

• Wood turtle

• Bald eagle

• Osprey

• Loggerhead shrike

• Red shouldered hawk

• Little brown bat

• Hine’s emeralddragonfly

• Blanchard’s cricketfrog

• Spruce grouse

• Cerulean warbler

• Eastern ribbon snake

• Black tern, Foster’stern

• Kirtland’s warbler

• Hooded warbler

• Henslow’s sparrow

10

Threatened and endangered animals encountered

Page 12: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Environmental monitoring

11

Page 13: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SMRP safety performance to date

• 1,200,000 hours of installation

• 7 OSHA incidents

• 2 lost time incidents

• OSHA RIR = 1.19

• Industry avg. RIR = 2.80

12

Page 14: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Installation techniques

• Open cutting (2%)

• Plowing (50%)• Vibratory plowing(>75%)

• Plug plowing (<25%)

• Boring (48%)• Directional

• Pneumatic boring

13

Page 15: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Vibratory plowing

14

Page 16: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

“Plug” plowing equipment

15

Page 17: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

16

Page 18: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

17

Page 19: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

18

Page 20: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Typical distribution automation (DA) scheme

19

Page 21: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

TotalPhase I & II

1994 382 434 155 (46%)

SMRP YearMiles URD

cableMiles main line

w/DASpend

(million $)

ProjectedSAIDI

(minutes)

Phase I

2012-2013 - - 6 -

2014 203 48 33 18

2015 229 103 47 19

2016 228 78 56 22

2017 283 99 61 23

2018 151 54 39 10

Phase II

2017 - - 2.5 -

2018 137 - 18 6

2019 274 - 64 26

2020 273 - 64 14

2021 216 - 35 17

2022 - - 2 -

20

Page 22: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System Modernization and Reliability Project

• 2014-2021 segments replaced with underground cable (all districts)

• Percent improvement 16% outage events

34% CMI

11% CI

Actual 2017outage events

Avoided 2017outage events

Actual 2017customerminutes ofinterruption(CMI)

Avoided 2017customerminutes ofinterruption(CMI)

Actual 2017customersinterrupted (CI)

Avoided 2017customersinterrupted (CI)

8,986 1,410 215,148,840 72,000,000 508,521 60,000

21

Page 23: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System Modernization and Reliability Project

• 2014–2018 distribution automation schemes (all 13 schemes)

• Percent improvement 0% outage events

2% CMI

8% CI

Actual 2017outage events

Avoided 2017outage events

Actual 2017customerminutes ofinterruption(CMI)

Avoided 2017customerminutes ofinterruption(CMI)

Actual 2017customersinterrupted (CI)

Avoided 2017customersinterrupted (CI)

8,986 0 215,148,840 6,000,000 508,521 36,000

22

Page 24: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System Modernization and Reliability Project

• Total SMRP underground installation and distributionautomation

• Percent improvement 16% outage events

36% CMI

20% CI

23

Page 25: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

System Modernization and Reliability Project

24

Page 26: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Additional estimates for PH I (2014–2018)

• 1,015 route miles of primarycircuit

• 2,533 actual miles of primarycable

• 80 route miles of secondary

• 128 miles of secondary cable

• 6,400 easements

• 3,680 new undergroundservices

• Warehousing materialthroughput doubled for entireWPS company

25

Page 27: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Slide 26

A2 secondary circuit?Author, 10/31/2019

Page 28: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SMRP cable system materials

• 1 PH transformer (15, 25 and 50 kVA)• Set on fiberglass box pads

• But flat pads not completely off the table yet

• Formerly included under oil arresters; now using elbow arresters

• Joints• Cold shrink with integral metallic shield and jacket exclusively• Some push-on joints were used in earlier years of PH 1• Recently converted CS joints to 100% shear bolt connectors

• Terminations• 100% cold shrink silicone rubber terminations

• Separable connectors• 200 A loadbreak• 600 amp dead break having 200 bushings for testing and grounding

purposes

• Junction enclosures – fiberglass• 200 A and 600 A

26

Page 29: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

SMRP materials – cable

• Cable sizes/designs (all use 100% insulation levels)• #1 Sol Al (full neutral) 25 kV JCN – most common cable used

• #4/0 Strd Al (90% neutral and 1/3rd neutral) 25 kV JCN

• 750 kcmil Al (1/6th neutral) 25 kV JCN

• Basic cable design as shown below:

• Note: Insulation mostly TRXLPE, but EPR also used

27

Solid or sealedconductor

Page 30: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Interesting SMRP facts

1. Contract installers are certified for installation of cableaccessories before working on-site.

2. Shunt reactors are sometimes employed on long cablelengths to control the “Ferranti effect” due to cablecapacitance.

3. When PSCW approved the project, use of unjacketed(bare) concentric neutral cable was allowed (and used).

• BCN cable no longer being installed.

4. On application for the CA, expected life for new cablewas indicated as:

60 years

28

Page 31: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Some examples of what we find:

SMRP materials – new cable inspection

29

Page 32: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

New cable inspection data

30

Inspecting new cable allows usto monitor trends in cablemanufacture with time such as:

• Cable insulation thickness

• Eccentricity

• Insulation cure

Page 33: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Project challenges

• No. 1 quality risk identified asterminations and splices

• Put into place a system to holdcontractors accountable• Partial discharge (PD) testing for all

personnel doing terminating

• Over 2,000 terminations/splices/riserstested

• One cable failure – due to backfillmaterial, one splice failure

• Contractors initialize each device theyterminate

31

Page 34: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Partial discharge (PD) testing

32

Page 35: IEEE ICC Education Session...IEEE ICC Education Session Oct.23,2019. Systeminformation ... – Improved voltage profile

Questions?

33