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New Richmond Load Serving Study
Northern MAPP Subregional Planning GroupAugust 16, 2006
Daniel Kline
3
Outline
Description of Area Various Load Serving Problems Study Methodology & Initial Alternatives Final Alternatives Considered Final Recommendation & Initial Project
Schedule Questions
4
Description of Area
Located in Western Wisconsin St. Croix County Just across Minnesota border, near I-94
Area fed by 161 kV sources and 69 kV subtransmission
Load belonging to Xcel and DPC
Lines belonging toXcel and DPC
5
Description of Area
Area Xcel Loads (2011): New Richmond (9.1 MW) Somerset (7.7 MW) Kinnickinnic (4.4 MW) Osceola (15.4 MW) River Falls (30 MW)
Area DPC Loads (2011): New Richmond (15 MW) Houlton (5.4 MW) Farmington (8.1 MW) Roberts (4.6 MW) Hammond (3.2 MW)
6
Description of Area
7
Description of Problems
Low voltage at New Richmond during outage of Pine Lake – New Richmond 69 kV line
Low voltage at Osceola during outage of Osceola – Osceola Tap 69 kV line
Overload of River Falls 115/69 kV transformer during outage of Osceola – Osceola Tap 69 kV line
Overload of Pine Lake 161/115 kV transformer during outage of King – Willow River 115 kV line
Normal Overload of Pine Lake – Rush River 69 kV line
8
Description of Problems
High load growth throughout area Installation of Chisago Line Project will
require extended outage of Osceola – Osceola Tap 69 kV line
No room for expansion at New Richmond Substation
No room for expansion at Rush River Substation
9
Study Methodology
2006 MAPP Series Cases 2011 Near-Term 2016 Out-Year
Study Group Asked to Review: Jerry Iverson, DPC Bob Roddy, DPC Dave Krause, KPE Jeff Haas, Xcel Walt Grivna, Xcel
10
Study Methodology
Assumptions and Adjustments made Assumed Chisago Line Project not in service in
2011 (In-service in 2016) New City of New Richmond Substation in
service Xcel’s Somerset Substation in service Added DPC N-60 line upgrade (477 ACSR)
11
Study Methodology
Base Case ResultsAffected Facility
Facility Rating
Facility Loading Contingency
River Falls 115/69 kV Transformer 70.0 103.6 System Intact
Pine Lake 161/115 kV Transformer 112.0 104.1 King to W illow River 115 kV Line
River Falls 115/69 kV Transformer 70.0 106.2 King to W illow River 115 kV Line
Apple River to Somerset 69 kV System 1.00 pu Low VoltageRiver Falls to South Fork 69 kV Line, Close Somerset to Farmington line
Apple River to Garfield 69 kV Line 25.0 120.6River Falls to South Fork 69 kV Line, Close Somerset to Farmington & W arren to Baldw in Tap
River Falls 115/69 kV Transformer 70.0 181.2Garfield to Sand Lake & St. Croix to Osceola Tap 69 kV Lines, Close Somerset to Farmington line
Kinnickinnic - Roberts - Baldw in Tap 69 kV Line 86.0 138.3Garfield to Sand Lake & St. Croix to Osceola Tap 69 kV Lines, Close Somerset to Farmington line
River Falls to Baldw in Tap 69 kV Line 84.0 170.6Garfield to Sand Lake & St. Croix to Osceola Tap 69 kV Lines, Close Somerset to Farmington line
Roberts to Farmington Tap 69 kV Line 86.0 122.7Garfield to Sand Lake & St. Croix to Osceola Tap 69 kV Lines, Close Somerset to Farmington line
River Falls 115/69 kV Transformer 70.0 148.3Osceola to Osceola Tap 69 kV Line, Close Somerset to Farmington line
River Falls to Troy 69 kV Line 84.0 123.5Osceola to Osceola Tap 69 kV Line, Close Somerset to Farmington line
River Falls to Glover Tap 69 kV Line 84.0 128.3 River Falls 115/69 kV Transformer
River Falls to Beldenville 69 kV Line 47.0 275.2 River Falls 115/69 kV Transformer
River Falls to South Fork 69 kV Line 84.0 116.6River Falls 115/69 kV Transformer, Turn on River Falls Generator
River Falls to Beldenville 69 kV Line 47.0 137.5River Falls 115/69 kV Transformer, Turn on River Falls Generator
12
Study Methodology
Base Case Results
13
Initial Ideas
Multi-Faceted Approach 5.4 MVAR Capacitor at Osceola 10.0 MVAR Capacitor at New Richmond New 69 kV switching station south of New Richmond that
would tap DPC N-60 line 115/69 kV Transformer near Kinnickinnic Substation 161/69 kV Transformer at Clear Lake Substation 69 kV line from Somerset to new substation north of New
Richmond 69 kV line from Cylon to new substation north of New
Richmond
14
Initial Ideas
Options investigated with and without Chisago project
Necessity of Poplar Lake Substation and 161/69 kV transformer investigated
15
Final Alternatives
Three options tagged for detailed review Alternative 1, Step 2A – Three Lakes 115/69 kV
Substation, Stanton 69 kV Substation, & Somerset to Stanton 69 kV Line
Alternative 1, Step 2B – Three Lakes 115/69 kV Substation, Stanton 69 kV Substation, & Cylon to Stanton 69 kV Line
Alternative 2, Step 1 – 115/69 kV Substation south of New Richmond
16
Final Alternatives - 1
17
Final Alternatives - 1** From bus ** ** To bus **
CKT ContMVA BaseFlow Rating Loading% Contingency
2011
I ndependence to Elk Creek 69 kV Line 25.8 25.8 25.0 103.4 * * Base Case * *
River Falls 115/69 kV Transformer 80.1 45.2 70.0 114.4 King to W illow River 115 kV Line
2016
I ndependence to Elk Creek 69 kV Line 25.9 25.9 25.0 103.8 * * Base Case * *
Osceola Tap to Border 69 kV Line 25.9 25.9 25.0 103.6 * * Base Case * *
Border to Sand Lake 69 kV Line 25.9 16.1 25.0 103.6Osceola to Osceola Tap 69 kV Line, Close Somerset to Farmington
Border to Sand Lake 69 kV Line 25.9 16.1 25.0 103.6St. Croix Tap to Osceola & Rice Tap to Roberts 69 kV Lines, Close Somerset to Farmington
Bus # Bus Name ContVolt BaseVolt Contin.Description
2011
68974 Buses Along DPC N-60 Line0.9248 0.9680 King to W illow River 115 kV Line
68962 Border 69 kV 0.9274 0.9786Crystal Cave to Pine Lake & Pine Lake to Apple River 161 kV Lines
68974 Houlton 69 kV 0.9430 0.9680Crystal Cave to Pine Lake & Pine Lake to Apple River 161 kV Lines
69011 Garfield 69 kV 0.9351 0.9860Crystal Cave to Pine Lake & Pine Lake to Apple River 161 kV Lines
69012 Sand Lake 69 kV 0.9282 0.9794Crystal Cave to Pine Lake & Pine Lake to Apple River 161 kV Lines
61041 Osceola 69 kV 0.9473 0.9749Three Lakes 115/69 kV Transformer
68783 Trap Rock 69 kV 0.9478 0.9755Three Lakes 115/69 kV Transformer
68974 Houlton 69 kV 0.9371 0.9680Three Lakes 115/69 kV Transformer
2016
No Violations
18
Final Alternatives - 2
19
Final Alternatives - 2** From bus ** ** To bus **
CKT ContMVA BaseFlow Rating Loading% Contingency
2011
I ndependence to Elk Creek 69 kV Line 25.8 25.8 25.0 103.2 * * Base Case * *
River Falls 115/69 kV Transformer 80.1 44.5 70.0 114.4 King to W illow River 115 kV Line
2016
Eau Claire 161/69 kV Transformer #2 118.3 118.3 112.0 105.6 * * Base Case * *
I ndependence to Elk Creek 69 kV Line 26.2 26.2 25.0 104.8 * * Base Case * *
Osceola Tap to Border 69 kV Line 37.6 24.8 25.0 150.3 King to W illow River 115 kV Line
Osceola Tap to Border 69 kV Line 31.3 24.8 25.0 125.1River Falls to South Fork 69 kV Line OR River Falls 115/69 kV Transformer
Osceola Tap to Border 69 kV Line 35.9 24.8 25.0 143.7 Three Lakes 115/69 kV Transformer
Bus # Bus Name ContVolt BaseVolt Contin.Description
2011
61041 Buses along DPC N-60 Line 0.9296 0.9738 King to W illow River 115 kV Line
68974 Houlton 69 kV 0.9394 0.9572
River Falls to South Fork 69 kV Line, Close Somerset to Farmington 69 kV Line
69012 Buses along DPC N-60 Line 0.8991 0.9772Garfield to Sand Lake 69 kV Line & St. Croix Falls to Osceola Tap 69 kV Line
68974 Houlton 69 kV 0.9447 0.9572 River Falls 115/69 kV Transformer
68974 Buses along DPC N-60 Line 0.9042 0.9572 Three Lakes 115/69 kV Transformer
2016
68974 Houlton 69 kV 0.9439 0.9825 King to W illow River 115 kV Line
68974 Houlton 69 kV 0.9446 0.9825 Three Lakes 115/69 kV Transformer
20
Final Alternatives - 3
21
Final Alternatives - 3** From bus ** ** To bus **
CKT ContMVA BaseFlow Rating Loading% Contingency
2011
I ndependence to Elk Creek 69 kV Line 25.5 25.5 25.0 102.1 * * Base Case * *
Pine Lake 161/115 kV Transformer 118.5 29.1 112.0 105.8
River Falls 115/69 kV Transformer 75.9 64.2 70.0 108.4
Pine Lake to New Richmond Sw itching Station Line 68.4 30.6 48.0 142.5
Apple River to Garfield 69 kV Line 29.6 20.6 25.0 118.5
River Falls 115/69 kV Transformer 74.0 64.2 70.0 105.7
Pine Lake to New Richmond Sw itching Station Line 48.4 30.6 48.0 100.8
Pine Lake to New Richmond Sw itching Station Line 56.8 30.6 48.0 118.3 River Falls 115/69 kV Transformer
River Falls 115/69 kV Transformer 70.9 64.2 70.0 101.3Osceola to Osceola Tap 69 kV Line, Close Somerset to Farmington
River Falls 115/69 kV Transformer 78.2 64.2 70.0 111.7Pine Lake to New Richmond Sw itching Station 115 kV Line
River Falls 115/69 kV Transformer 72.0 64.2 70.0 102.9 Crystal Cave to Apple River 161 kV Line
Apple River to Sand Lake 69 kV Line 68.0 20.6 25.0 272.2
Osceola to Sand Lake 69 kV Line 49.0 6.9 25.0 196.1
Houlton to Farmington Tap 69 kV Line 18.0 12.0 17.0 106.1
2016
Eau Claire 161/69 kV Transformer 118.6 118.6 112.0 105.9 * * Base Case * *
Independence to Elk Creek 69 kV Line 26.2 26.2 25.0 104.8 * * Base Case * *
Osceola Tap to Border 69 kV Line 30.3 30.3 25.0 121.2 * * Base Case * *
Eau Claire 161/69 kV Transformer 121.3 118.6 112.0 108.3
Pine Lake 161/115 kV Transformer 113.2 44.2 112.0 101.1
Pine Lake to W arren 69 kV Line 34.0 3.9 17.0 200.0 River Falls to South Fork 69 kV Line
Border to Sand Lake 69 kV Line 25.6 16.3 25.0 102.3 Osceola to Osceola Tap 69 kV Line
Garfield to Sand Lake & St. Croix Falls to Sand Lake 69 kV Lines, Close Somerset to Farmington
River Falls to South Fork 69 kV Line, Close Somerset to Farmington
King to W illow River 115 kV Line
King to W illow River 115 kV Line
New Richmond Sw itching Station to Houlton Tap 69 kV Line, Close Somerset to Farmington
Voltage Violations too numerous to mention
22
Final Recommendation
Alternative 1 Recommended 10 MVAR Cap Bank at New Richmond – ASAP Three Lakes Substation – ASAP 5.4 MVAR Cap Bank at Osceola – May 31, 2009 Rebuild Osceola to Sand Lake 69 kV Line – May 31, 2009 Relocate Rush River Substation and cut over to 161 kV –
May 31, 2010 Construct Somerset Sub – May 31, 2010 Construct Stanton Sub – December 31, 2010 Construct Somerset to Stanton 69 kV Line – May 31, 2011 Complete installation of Chisago Line Project – May 31,
2011 Construct Poplar Lake Sub & 161/69 kV Transformer –
May 31, 2011
23
Next Steps
Currently compiling necessary information for business case
Will have more meetings with Study Group prior to any filings