Bakken Area Transmission Strategy Matthew Stoltz Basin Electric - - PowerPoint PPT Presentation

Bakken Area Transmission Strategy

Matthew Stoltz Basin Electric Manager of Transmission Services

Tioga Charlie Creek AVS Leland Olds Belfield

2010 2011 2012 2013 2016

345kV Line 230kV Line 115kV Line

Bakken Transmission Challenges

• Volt

ltage S Stabilit ility – Low Low Vol

• ltage,

tage, P Pow

• wer

er Qual uality ty, P Poor

• or “Profi
• file”

e”

• Li

Line ne and and Trans ansfor former er O Over erloads

• ads

– Facili ility Ra Ratin ings Ch Check!! !!

• Outages

utages – For

• rced and

ed and Planned anned

• We Must Re

Respect Re Relia liabili ility Cr Crit iteria ia

Load/Voltage Curve

0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 1.02 1.04 1000 1050 1100 1150 1200 1250 1300 1350 1400 1450 1500 1550 Voltage Study Area Load MW

Watford City 115kV Voltage

AVS-CCR 345kV Outage, MCDC at 20MW East-West Culbertson = 0MW

Base Case Capacitor Banks

SASKATCHEWAN

MONTANA NORTH DAKOTA SOUTH DAKOTA

TYPICAL SYSTEM INTACT VOLTAGE PROFILE Existing System 2013 Load

Voltage Support Solutions

1. 1. Capac apacitor B Bank ank – Pro’

• ’s: Cheap

heap, Fas ast Ins nstallation

• n

– Con’

• n’s: E

E^2/X, V Vol

• ltage S

Step C ep Change hange 2. 2. More T Transmissio smission – Pro’

• ’s: I

Impr prove S Sur urge ge I Imped pedance e Loadi Loading E Effec ect – Con’

• n’s: E

Expen pensive, Long Long Lead T Lead Time 3. 3. Mor

• re Gener

Generation – Pro’s ’s : MW & MVAR AR’s Suppor upport S System – Con’

• n’s: Oper

Operat ating C Cos

• st

4.

• 4. Under

nder Vol

• ltag

age Load S Load Shed “ hed “UVLS LS” Pro’

• ’s : Cheap,

heap, Fas ast Con’

• n’s: T

Trippi pping Load Load 5.

• 5. Sync

nchron

• nous C

Condens

• ndenser

Pro’

• ’s: A

Active e VAR’s, “ “Smooth” R Res espon ponse, Inc ncrement ntally Cheap: heap: Con’

• n’s: N

Need eed Gener Generation n Proj

• jec

ect, Ot Other herwise Expensive sive

Capacitor Bank Addtions

Location Entity Cost In Service Total Size Notes: Dickinson 115 MDU ~$2M 2012 30 MVAR 2 x 15MVAR for switching Logan 115 Basin Electric ~$2M 2012 30MVAR 2 x 15 MVAR Blaisdel 115 Basin Electric ~$2M 2012 30 MVAR 2 x 15 MVAR Dunning 115 Central Power ~$1.7M 2013 20 MVAR 2 x 10MVAR Kenaston 115 Burke Divide ~$1.5M 2012 12 MVAR 2 x 6 MVAR Watford City 115 WAPA ~$2M 2013 30 MVAR 2 x 15MVAR for switching SW Minot 115 Central Power ~$1.2M 2013 10 MVAR 1 x 10MVAR

345kV Line 230kV Line New Caps

Pioneer Station LM6000 Lonesome Creek Station LM6000

Generation / Synchronous Condenser Locations

Transmission Line Loading Issues Typically Limited By Clearance (Sag) Mitigations

• 1. Dynamic Line Ratings

Weather (real-time or seasonal) Measuring Actual Line Properties

• 2. Increasing Clearances

Raising Structures, Adding Structures

• 3. Reconductor
• 4. Add New Lines

345kV Line 230kV Line 115kV Line

Proposed Transmission Locations

100 200 300 400 500 600 700 800 900 1000 1100 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 MW

Williston Load Pocket - Winter Peak

MDU Load Coop Load

AVS-Neset 345KV Line

Snake Creek 115 Line Watford-Williston 230 Line

Existing System

L.Creek #2-3 Pioneer #2-3 Pioneer #1 L.Creek #1

Approximate Limits Analysis In Progress

Long Range Study

Game Plan

1. 1. PER PERMAN MANEN ENT SO SOLUTION

• PU

PUSH SH SYST SYSTEM AD EM ADDITIONS – REST ESTORE MAR E MARGIN! 2. 2. TEMPORA RARY RY S SOLUT LUTIONS NS

• OPT

PTIMIZE E OPER PERAT ATING G GUIDES ES

• TARG

RGETED P D POST OUT UTAGE LO LOAD D CURT CURTAILM LMENT NTS

• IMPLE

LEMENT NT UNDE UNDER R VOLT LTAGE LO LOAD D SHE HEDDI DDING NG