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

Bakken Area Transmission Strategy Matthew Stoltz Basin Electric Manager of Transmission Services

Tioga 2011 2013 2012 2016 Charlie Creek AVS Leland Olds Belfield 2010 345kV Line 230kV Line 115kV Line

Bakken Transmission Challenges • Volt ltage S Stabilit ility – Low Low Vol oltage, tage, P Pow ower er Qual uality ty, P Poor oor “Profi ofile” e” • Li Line ne and and Trans ansfor former er O Over erloads oads – Facili ility Ra Ratin ings Ch Check!! !! • Outages utages – For orced and ed and Planned anned • We Must Re Respect Re Relia liabili ility Cr Crit iteria ia

Load/Voltage Curve Watford City 115kV Voltage AVS-CCR 345kV Outage, MCDC at 20MW East-West Culbertson = 0MW 1.04 1.02 1 0.98 Voltage 0.96 Capacitor Banks 0.94 0.92 0.9 Base Case 0.88 0.86 1000 1050 1100 1150 1200 1250 1300 1350 1400 1450 1500 1550 Study Area Load MW

TYPICAL SYSTEM INTACT VOLTAGE PROFILE Existing System 2013 Load SASKATCHEWAN MONTANA NORTH DAKOTA SOUTH DAKOTA

Voltage Support Solutions 1. 1. Capac apacitor B Bank ank 4. Under 4. nder Vol oltag age Load S Load Shed “ hed “UVLS LS” Pro’ o’s : Cheap, heap, Fas ast – Pro’ o’s: Cheap heap, Fas ast Ins nstallation on Con’ on’s: T Trippi pping Load Load – Con’ on’s: E E^2/X, V Vol oltage S Step C ep Change hange 5. 5. Sync nchron onous C Condens ondenser 2. 2. More T Transmissio smission Pro’ o’s: A Active e VAR’s, “ “Smooth” R Res espon ponse, – Pro’ o’s: I Impr prove S Sur urge ge I Imped pedance e Loadi Loading E Effec ect Inc ncrement ntally Cheap: heap: Con’ on’s: N Need eed Gener Generation n Proj ojec ect, Ot Other herwise – Con’ on’s: E Expen pensive, Long Long Lead T Lead Time Expensive sive 3. 3. Mor ore Gener Generation – Pro’s ’s : MW & MVAR AR’s Suppor upport S System – Con’ on’s: Oper Operat ating C Cos ost

Capacitor Bank Addtions Total Location Entity Cost In Service Notes: Size Dickinson 115 MDU ~$2M 2012 30 MVAR 2 x 15MVAR for switching Logan 115 30MVAR 2 x 15 MVAR Basin Electric ~$2M 2012 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

Generation / Synchronous Condenser Locations Pioneer Station LM6000 Lonesome Creek Station LM6000 345kV Line 230kV Line New Caps

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

Proposed Transmission Locations 345kV Line 230kV Line 115kV Line

Williston Load Pocket - Winter Peak 1100 1000 Long Range Study 900 L.Creek #2-3 800 Pioneer #2-3 AVS-Neset 345KV Line Pioneer #1 700 L.Creek #1 600 MW Snake Creek 115 Line Watford-Williston 230 Line 500 400 Existing System 300 200 Approximate Limits 100 Analysis In Progress 0 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 MDU Load Coop Load

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