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Oil Load Serving Study Update. August 18 th , 2011. OIL LOAD SERVING STUDY AREA. WILLISTON LOAD POCKET. ASSUMPTIONS. MCDC LIMITED TO 100MW E-W MDU PEAKERS OFF LEWIS & CLARK GEN ON WIND OFF CULBERSTON OFF BUT AVAILABLE FOR PRIOR OUTAGES FORT PECK GENERATION = 35MW, MAX ~135MW

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Assumptions

ASSUMPTIONS

MCDC LIMITED TO 100MW E-W

MDU PEAKERS OFF

LEWIS & CLARK GEN ON

WIND OFF

CULBERSTON OFF

BUT AVAILABLE FOR PRIOR OUTAGES

FORT PECK GENERATION = 35MW, MAX ~135MW

WINTER PEAK LOADS


Challenges

CHALLENGES

VOLTAGE STABILITY

LOW VOLTAGE, POWER QUALITY, POOR “PROFILE”

REGIONAL LOAD INCREASES

115KV LINE OVERLOADS

MAINLY FEEDING WILLISTON POCKET



Oil load serving study update

EXISTING SYSTEM

Charlie Creek-Williston at 115kV

Charlie Creek

345kV Line

230kV Line

115kV Line


Oil load serving study update

BASELINE FORECAST

Existing System Limit Until July 2012


Oil load serving study update

July 2012

Charlie Creek-Williston at 230kV



Oil load serving study update

Williston-CCR 230

& Cap Additions

BASELINE FORECAST


Oil load serving study update

2013

Networked 115kV

Des Lacs



Oil load serving study update

Williston SVC

BASELINE FORECAST



Oil load serving study update

ADD 345KV

BASELINE FORECAST



Oil load serving study update

BASELINE FORECAST

Williston-CCR 230

& Cap Additions

Networked 115kV


Oil load serving study update

BASELINE FORECAST

Networked 115kV

Williston-CCR 230

& Cap Additions


Oil load serving study update

BASELINE FORECAST

Networked 115kV

Williston-CCR 230

& Cap Additions