transmission coordination and planning committee · pdf file · 2016-12-06o...

Transmission Coordination and Planning Committee 2016 Q4 Stakeholder MeetingNovember 30, 2016

TCPC Meeting Policies

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FERC Standards of ConductThe FERC Standards of Conduct state that Transmission Function Employees are prohibited from disclosing non-public Transmission Information unless they disclose it on the OASIS. Also, Transmission Function Employees and Shared Employees are expressly prohibited from disclosing non-public information to Energy or Marketing Affiliates.

Anti-Trust PolicyIt is the committee’s policy to comply with all state and federal anti-trust laws. One objective of the TCPC is top promote or enhance competition. Careful attention should be paid to any discussions regarding you or your competitors prices, allocation of markets, customers, or products, limiting production, and excluding dealings with other companies.

ConfidentialityCertain information may be protected as confidential due to Standards of Conduct concerns or because it is classified as Critical Energy Infrastructure Information. Otherwise, it should be on the OASIS. Committee members agree not to share committee activities with the press and do not discuss ideas or concerns other than your own in a public forum.

Troy Bedford of Black Hills Energy,

Colorado Electric

Agenda

1. Welcome and Introductions 2. BHCE Updates 3. Ten-Year Transmission Plan 4. Generator Interconnection Queue 5. Regulatory Update 6. 2016 Planning Study Scope 7. Power flow Results8. Transient Stability Results9. Short Circuit Results10. Stakeholder Input & Questions

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10-Year Transmission Plan

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PROJECT ISD STATUS

Rattlesnake Butte 115 kV Terminal Addition Sept 2016 Completed

Boone-Nyberg 115 kV Project Dec 2016 In-Construction

Boone 115-69 kV Transformer Replacement Oct 2016 Completed

Pueblo Plant-Reader 115 kV Line Terminal Upgrade Sept 2017 Planned

Baculite Mesa-Fountain Lake 115 kV Line Rebuild Jan 2017 In-Construction

Fountain Lake (Overton Project) 115-69 kV Substation

July 2017 In-Construction

La Junta 115-69 kV Transformer Addition Dec 2018 Planned

Rocky Ford - La Junta 69kV Network Upgrades Dec 2018 Planned

Portland 115/69 kV Transformer Replacement Dec 2019 Planned


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PROJECT ISD STATUS

West Station 115 kV Substation Upgrades Mar 2018 Planned

Arequa Gulch 115 kV Capacitor Bank Dec 2018 Planned

West Station –West Canon 115kV Line 2019-2020 Planned

Desert Cove – Fountain Valley 115 kV Line Rebuild 2019 Proposed

Fountain Valley – MidwayBR 115 kV Line Rebuild TBD Proposed

Replace breaker Jumpers at Airport industrial TBD Proposed

Replace CT on Midway-Northridge 115kV Line TBD Proposed

Rebuild Nyberg-Airport Memorial 115kV Line TBD Proposed

Boone-La Junta 115kV Line Rebuild TBD Proposed


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BOONE

DOT/PDA

READER

TO PONCHA

TOLAMAR

TO WALSENBURG

COMANCHE

NYBERG

AIRPORTMEMORIAL

AIRPORTINDUSTRIAL

PUEBLO PLANT

HYDE PARK

BHCE 115 kV

PSCO 115 kV

TSGT 115 kV

OWNERSHIP LEGEND

PSCO 230 kV

WAPA 230 kV

LA JUNTA(BHCE)

LA JUNTA(TSGT)

BACULITEMESA

NORTHRIDGE

PORTLAND

TO WALSENBURG

MIDWAY

SKALA

CANON CITY

AREQUA GULCH

DESERT COVE

FOUNTAIN VALLEY

BURNTMILL

GREENHORN

PSCO 345 kV

TO DANIELS PARK

RATTLESNAKE BUTTE

FOUNTAIN LAKE (OVERTON)

PUEBLO RESERVOIR

WEST CANON

WEST STATION

NORTHCANON

TOLAMAR

IN-CONSTRUCTION

PLANNED

PROPOSED

BHCE Resource Update• Active Large Generator Interconnection Request

o BHCT-G6 40MW Combustion Turbine at Baculite Mesa• Revised In-Service-Date December 2016• Signed Interconnection Agreement• Under construction

o BHCT-G10 29 MW Wind at Rattlesnake Butte substation• Removed from Suspension• Revised In-Service-Date June 2020• Signed Interconnection Agreement

o BHCT G11 29 MW Wind at Rattlesnake Butte substation• Revised In-Service-Date June 2020• Interconnection Agreement Pending

o BHCT-G13 63 MW Solar at Boone 115 kV substation• In-Service-Date December 2017• Interconnection Agreement Pending

o BHCT G18 60 MW Wind at Rattlesnake Butte substation• In-Service• Signed Interconnection Agreement

o BHCT G19 60 MW Solar at Baculite Mesa substation (PAGS)• In-Service-Date November 2019• Facilities Study in Progress

o BHCT G20 60 MW Solar at Baculite Mesa substation (PAGS)• In-Service-Date November 2019• Facilities Study in Progress

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Colorado Regulatory Efforts

Colorado Rule 3627 & Colorado SB100:www.blackhillsenergy.com/your-neighborhood/transmission-distribution/transmission-projects

Colorado Rule 3206:–Next report to be filed by April 30, 2017

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2016 Study Scope: 2, 5 and 10-Year Scenarios

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• 2018 Heavy Summer Loado Power flow and Voltage & Transient Stability

• 2018 Light Winter Loado Power flow & Transient Stability

• 2020-21 Heavy Winter Loado Power flow Analysis

• 2026 Heavy Summer Loado Power flow Analysis

2016 Study Criteria

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• 2016 Local Transmission Planning Studieso New NERC TPL-001-4 Transmission System Planning Performance

Requirements Standard replaces the old TPL-001-0.1 thru TPL-004-0 System Performance Standard

o Category (P0 – P7) events evaluation replaces Category (A – C)o P0 = No Contingency (N-0)o P1 = Single Contingency (N-1)o P2 = Single Contingency (N-1 or N-2)o P3 – P7 = Multiple Contingency (N-2 or N-1-1)

o Extreme Events evaluation replaces Category Do A replacement for TPL-001-WECC-CRT-2.1 Regional System

Performance Criteria has been approved.

2016 LTP Study Sensitivity Scenarios (Steady-state)

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• All Case Sensitivitieso Benchmark Case includes all planned projects in service

and scaled forecast loadso Sensitivity 1 – Lamar DC Tie 200MW East-West/West-

Easto Sensitivity 2 – High Renewable/Low thermal-Solar &

Wind 100%o Sensitivity 3 – Low Renewable/high thermalo Sensitivity 4 – Lamar DC tie 200MW East-West/West-

East & Colorado Green Energy Center 100%

2016 LTP Study Sensitivity Scenarios (Dynamics)

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• 2017-18 Light Winter Case Sensitivitieso Benchmark Case includes all planned projects in service and scaled

forecast loads.o Sensitivity - High renewable/low thermal generation and Lamar DC

tie 0MW

• 2018 Heavy Summer Case Sensitivitieso Benchmark Case includes all planned projects in service and

forecast loads.o Sensitivity - High thermal/low renewable and Lamar DC tie 100MW

E-W.

2016 LTP Study Results

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• 2017-18 Light Winter Case

o Facility Rating Limits Exceeded (P6, P7):o Canon City-Skala 115 kV (136%/120MVA)o Canon City-West Canon 115 kV (116/120MVA)o Portland-Skala 115 kV (139%/120MVA)o MidwayPS-Northridge 115 kV (103%/100MVA)

o During periods of high E-W flows across the system operate 115 kV system OPEN until new transmission line (W. Station – W. Canon 115 kV) is built.


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• 2018 Heavy Summer Case o Facility Rating Limits Exceeded (P2 & P6):

o Portland – Skala 115 kV (132%/ 111MVA)o Portland-West Station #1 115 kV (148%/ 111MVA)o Portland-West Station #2 115 kV (104%/ 160MVA)o Canon City - Skala 115 kV (118%/119MVA)o Canon City-West Canon 115kV (113%/120MVA)o Canon City 115/69 kV transformer (114%/56MVA)o West Canon 230/115kV Transformer (111%/100MVA)o Portland 115/69 kV Transformer (116%/25MVA)o West Station-Desert Cove (141%/119MVA)o Desert Cove-Fountain Valley-MidwayBR (123%/119MVA)o Nyberg-Airport Memorial 115 kV (122%/119MVA)

o During periods of high E-W flows across the system operate 115 kV system OPEN until new transmission line (W. Station – W. Canon 115 kV) is built.


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• 2021 Heavy Winter Case o Facility Rating Limits Exceeded (P2 & P6):

o Portland – Skala 115 kV (134%/ 120MVA)o Portland-West Station #1 115 kV (135%/ 119MVA)o Portland-West Station #2 115 kV (100%/ 160MVA)o Canon City – Skala 115 kV (129%/120MVA)o Canon City-West Canon 115kV (100%/120MVA)o West Canon 230/115kV Transformer (115%/100MVA)

o Multiple scenarios, in general during periods of high thermal generation and E-W flows across the system.


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• 2026 Heavy Summer Case o Facility Rating Limits Exceeded (P4 & P6):

o Portland – Skala 115 kV (122%/ 111MVA)o Portland-West Station #1 115 kV (141%/ 111MVA)o Portland-West Station #2 115 kV (98%/ 160MVA)o Canon City – Skala 115 kV (109%/119MVA)o West Canon 230/115kV Transformer (117%/100MVA)o Nyberg-Airport Memorial (117%/119MVA)o West Station-Desert Cove (121%/119MVA)o Desert Cove-Fountain Valley-MidwayBR (105%/115MVA)

o Multiple scenarios, in general during periods of high E-W and S-N flows across the system.


• Transient Stability Results:o 18HS and 17-18 LW cases studiedo No WECC-TPL-001-4 System Performance Criterion

Violationso All angles were positively dampedo All stable power swings did not result in unnecessary

trippingo OOS relaying should be considered for the Pueblo,

Rocky Ford, and Airport Diesels following breaker failures at Baculite Mesa and West Station 115kV substations

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Voltage Stability Analysis

o V-Q (reactive power margin)

• All BHCE 115kV buses resulted in a positive margin

o P-V (growth margin)

• 22% BHCE System

• 8% Canon City Area

• 47% Pueblo Area

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Short-Circuit Analysis:

o 2021 Year Case

o Fault Currents at West Station 69 kV and 115 kV buses

exceed some breakers interrupting capability

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2016 LTP Study Results Summary

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Cañon City Area Summaryo No new issues identified.o Limited import capability on 115 kV system for multiple

contingencies.o Limited 115:69 kV transformation capacity and load transfer

capability of the 69 kV system.o Voltage support needed for potential load growth at Arequa

Gulcho Continue with replacement of the Portland 115/69 kV

transformero During periods of high E-W flows across the system operate

115 kV system OPEN until new transmission line (W. Station – W. Canon 115 kV) is built.

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Pueblo Area Summaryo New West Station 115 kV terminals for Hyde Park and Desert

Cove lines to utilize full line capacity. o Upgrade Desert Cove-Fountain Valley-Midway 115 kV Line.o Upgrade Nyberg-Airport Memorial 115kV Line.o Replace the Terminal Limitation on the Midway-Northridge

115 kV Line.o Replace under sized West Station breakers and add breaker

failure protection

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Rocky Ford Areao No new issues identified.o The 115 kV & 69 kV Local Network Upgrade Projects in the Rocky

Ford Area should continue as planned:o Remove 69kV terminal limitations at Boone, Rocky Ford &

La Juntao Additional 50 MVA La Junta 115/69 kV transformero Add two additional 6 MVAR capacitor banks

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2016 LTP Study Results Summary (Steady-state)

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Long Lead Time Analysiso West Canon 230/115 kV transformer:

o Facility Rating limits exceeded (P1, P2).o Portland-West Station (111MVA)o West Station-Desert Cove (119MVA)o Desert Cove-Fountain Valley (119MVA)o Fountain Valley-MidwayBR (119MVA)o Poncha-Smelter 115kV (60MVA)o Portland-Skala 115kV (120MVA)o Canon City-Skala 115kV (120MVA)

o The West Station-West Canon 115 kV line should continue as planned along with the Fountain Valley-Midway(WAPA) 115kV upgrade to alleviate the overloads following the long lead time condition.

2016 LTP Study Results Summary (Steady-state)

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Extreme Event Analysis2. Local area event affecting the Transmission System such as:

a) Loss of a tower line with three or more circuits.b) Loss of all Transmission lines on a common Right-of-Way.c) Loss of a switching station or substation.d) Loss of all generating units at a generating station.e) Loss of a large Load or major Load center.

Worse Case (TPL-001-4 Steady State 2b) Common Corridor Contingency

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• 2016 LTP Studyo Complete draft 2016 LTP report and distribute for stakeholder

review and approvalo Publish approved final 2016 LTP report

• 2017 LTP Studyo Q1 Meeting March 30th 2017• Stakeholder requests for specific scenarios or considerations should

be submitted at this time to:• https://doc.westconnect.com/Documents.aspx?NID=15226

Next Steps

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https://doc.westconnect.com/Documents.aspx?NID=15226

Questions?

Wes Wingen, PEManager of Transmission [email protected](605) 721-2268

Jon CichoszTransmission Planning [email protected](605) 721-1704

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mailto:[email protected]

mailto:[email protected]