SPP-RTO: Operational CharacteristicsDerek Hawkins, Supervisor Real Time Support

May 23, 2018

2SouthwestPowerPool SPPorg southwest-power-pool

The SPP Footprint: Members in 14 States • Arkansas• Kansas• Iowa• Louisiana• Minnesota• Missouri• Montana• Nebraska• New Mexico• North Dakota• Oklahoma• South Dakota• Texas• Wyoming

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Helping our members work together to keep the lights on … today and in the future.

Our Mission

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North American Independent System Operators (ISO) and Regional Transmission Organizations (RTO)

Summer Peak: 50,622 MW

Winter Peak: 43,584 MW

Minimum Load: ~20,500 MW

Operating Region • Miles of service

territory: 546,000

• Population served: 17.5M

• Generating Plants: 795

• Substations: 4,929

• Miles of transmission: 66,497

• 69 kV 16,862• 115 kV 15,684• 138 kV 9,703• 161 kV 5,615• 230 kV 7,523• 345 kV 11,016• 500kV 92

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GENERATING Capacity* by Fuel Type(87,086 MW total)

6* Figures refer to nameplate capacity as of 1/1/18

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2017 Energy Production by Fuel Type (259,554 GWh total)

19.5%

46.3%

4.2%

22.7%

6.8% 0.6% 0.2%

Gas (19.5%)

Coal (46.3%)

Hydro (4.1%)

Wind (22.7%)

Nuclear (6.8%)

Other (0.3%)

Solar (0.2%)

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Wind in SPP’s System• Wind installed today: 17,796 MW

• Maximum wind output: 15,690 MW (12/15/17)

• Wind Capacity MW (1/1/2018 – 5/8/2018) >14GW, 25 days >14.5GW, 10 days >15GW, 0 days

• Largest windfarm: 400 MW (Grand Prairie in Holt County, NE)

• Unbuilt wind w/signed interconnection agreements: ~10 GW

• Wind in all stages of study and development: ~60 GW

• Forecast wind installation in 2020: >20 GW (more than SPP’s current minimum load)

561 2171 01146

3827 3328

1877

5256 7427 74278573

1240015728

1775017750

20326

25391

30456

1775018958

22300

30650

39010

2022

4805947190 45394 45302

45873

50622 50574 50622 50718 50958

51198

16560 1670617660 18092 17370

1994820417

20465

20561

2080121041

0

10000

20000

30000

40000

50000

60000

2011 2012 2013 2014 2015 2016 2017 2018 2020 2025 2030

Yearly Installed Capacity Total Installed Capacity Future Trend Based on 17-Year History

Future Trend Based on 9-Year History Forecasted End of the Year Installed Capacity SPP Annual Peak Load

SPP Annual Minimum Load

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Wind Capacity Installed By Year

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Wind Penetration

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• Maximum wind penetration: Instantaneous: 63.96% (4/30/18) Hourly Average: 62.89% (4/29/2018) Daily Average: 54.1% (4/29/2018) Wind Penetration Highs (1/1/2018 – 5/8/2018)

>60%, 6 days >50%, 40days

• Average wind penetration (2017): ~25%

• Max wind swing in one day: >10 GW(12.5 GW to 2 GW back to 12 GW)

• Max 1-hour ramp: 3,700 MW

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Annual Average Wind Speeds

Wind, 60,770

Solar, 17,667

Natural Gas, 1,879

Steam Turbine, 29

Storage, 1,212Pending GI Requests

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MW Requested by Generation Type

May 11, 2018

Solar in the U.S.

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Solar in SPP

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Focus on renewable forecast accuracy

Offline and online VSAT

PMU siting on new generation

Flexible product evaluation

Planning process enhancements

Identify and monitor increased risk scenario contributors

Interchange Capabilities

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2017 Congestion Patterns

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Flowgate Name Region Flowgate Location

WDWFPLTATNOW Western Oklahoma

Woodward - FPL Switch 138 kV ftlo Tatonga - Northwest 345 kV (OGE)

NEORIVNEOBLC SE Kansas / SW Missouri

Neosho - Riverton 161 kV (WR-EDE) ftlo Neosho - Blackberry 345 kV (WR-AECI)

PLXSUNTOLYOA West Texas (Lubbock)

Plant X Sub - Sundown 230 kV ftlo Tolk - Yoakum 230 kV (SPS)

SHAHAYPOSKNO Western Kansas

South Hays - Hays 115 kV ftlo Post Rock - Knoll 230 kV (MIDW)

VINHAYPOSKNO Western Kansas

Vine - Hays 115 kV ftlo Post Rock -Knoll 230 kV (MIDW)

CARLPDLUBWOL West Texas(Lubbock)

Carlisle - Doud 115 kV ftlo Lubbock South - Wolfforth 230 kV (SPS)

HANMUSAGEPEC Oklahoma City area

Hanncock - Muskogee 161 kV ftlo Agency - Pecan Creek 161 kV (OKGE)

SILSPRTONFLI NW ArkansasSiloam - Siloam Springs 161 kV ftlo Tonnece - Flint Creek 345 kV (CSWS-GRDA)

OSGCANBUSDEA TX Panhandle (Amarillo)

Osage Switch - Canyon East 115 kV ftlo Bushland - Deaf Smith 230 kV (SPS)

FRASPECOLMEAEastern SD /Nebraska Border

Ft. Randall - Spencer 115 kV (NPPD-WAUE) ftlo Meadow Grove - Kelly 230 kV (NPPD)

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Flowgate Name Region Flowgate Location

WDWFPLTATNOW Western Oklahoma

Woodward - FPL Switch 138 kV ftlo Tatonga - Northwest 345 kV (OGE)

NEORIVNEOBLC SE Kansas / SW Missouri

Neosho - Riverton 161 kV (WR-EDE) ftlo Neosho - Blackberry 345 kV (WR-AECI)

PLXSUNTOLYOA West Texas (Lubbock)

Plant X Sub - Sundown 230 kV ftlo Tolk - Yoakum 230 kV (SPS)

SHAHAYPOSKNO Western Kansas

South Hays - Hays 115 kV ftlo Post Rock - Knoll 230 kV (MIDW)

VINHAYPOSKNO Western Kansas

Vine - Hays 115 kV ftlo Post Rock -Knoll 230 kV (MIDW)

CARLPDLUBWOL West Texas(Lubbock)

Carlisle - Doud 115 kV ftlo Lubbock South - Wolfforth 230 kV (SPS)

HANMUSAGEPEC Oklahoma City area

Hanncock - Muskogee 161 kV ftlo Agency - Pecan Creek 161 kV (OKGE)

SILSPRTONFLI NW ArkansasSiloam - Siloam Springs 161 kV ftlo Tonnece - Flint Creek 345 kV (CSWS-GRDA)

OSGCANBUSDEA TX Panhandle (Amarillo)

Osage Switch - Canyon East 115 kV ftlo Bushland - Deaf Smith 230 kV (SPS)

FRASPECOLMEAEastern SD /Nebraska Border

Ft. Randall - Spencer 115 kV (NPPD-WAUE) ftlo Meadow Grove - Kelly 230 kV (NPPD)

Coordinating Congestion Management

20https://www.nerc.com/pa/rrm/TLR/Pages/Reliability-Coordinators.aspx

Seams Coordination

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• Utilize market resource dispatch to control loading

• May or may not be accompanied by a TLR

• SPP is also utilizing auto-activation for identified constraints

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• May be used in conjunction with CME when appropriate conditions exist:

• IDC curtailable transactions• NNL impacts• External impacts

• SPP also receives notifications when another RC issues a TLR that impacts transactions sinking in BAs under SPP RC purview

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• In certain instances, reconfiguration of the transmission system may result in decreased loading of constrained facilities

• These options are studied by operations planning and real-time engineers*

* SPP staffs two 24x7 engineers for real-time operations support

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• Sometimes, local area problems warrant actions outside of the Interconnection-wide relief procedures

• SPP helps to facilitate appropriate communication, coordination, and actions needed between affected entities

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• Situations may arise where congestion is highly impacted by the output of non-dispatchable generation

• Operating instructions to maintain output at a certain level may be necessary

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Congestion Management Events (CME)

Transmission Loading Relief (TLR)

Reconfiguration

Operating Guides

Out-of-Merit Energy (OOME)

Market-to-Market (M2M)

• Only occurs between SPP and MISO• Initiated by either SPP or MISO• Achieve least cost re-dispatch needed

to provide the required physical relief on a flowgate

• Limited to Reciprocal Coordinated Flowgates (RCF)

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M2M

Priority Number One: RELIABILITY

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Safe Operating Mode (SOM) may be initiated if none of the above options

result in satisfactory flow control or do not address other reliability concerns.

Thank You

Connect with SPP:

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