Transmission Expansion Plan to Minimize Congestion Between Arizona, - PowerPoint PPT Presentation

California Independent System Operator Transmission Expansion Plan to Minimize Congestion Between Arizona, Nevada, and California Jeff Miller California ISO January 18, 2005

California Independent System Operator Methodology • PLEXOS Production Cost Program – Conducts an hour by hour simulation for an entire year – Models the full network using a DC powerflow • Assumes that the nonlinear system is linear • No vars, just MW so all ratings are in MW • Voltage and stability limits have to be translated to MW limits – Goal is to minimize production cost (fuel and variable O&M) • Many simplifying assumptions - no wheeling rates, no losses, no unit commitment • To ease analysis, chronological line flows are reordered by magnitude to create flow duration curves 2 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator What Can We Learn From Flow Duration Curves • Able to view an entire year of operation rather than a snapshot like in a power flow case • Provides useful insight into the ratings that planners study and achieve • Provides useful insights into the interaction between different projects and different interfaces (i.e., the effect on WOR of an increase in EOR) • Useful for planning projects (line ratings, series comp levels, etc.) • Helps in understanding economic study results 3 \CAISO\jmiller MSC Meeting, 1/18/2005

DC Intertie IPP DC DC California Independent 500 kV System Operator 345 kV West 230 kV of Northern Nevada East River California of River Southern California Arizona Palo Verde West Mexico 4 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Assumptions • 2008 SSG-WI assumptions with increased renewables in California • Path 49 Upgrades – Palo Verde-Devers #1 Series Capacitors Upgraded – Hassayampa-North Gila-Imperial Valley Series Capacitors Upgraded – 2 nd Devers 500/230 kV Transformer added – SVC added at Devers • Miguel-Mission 230 kV line added • East of River limited to 8,055 MW • West of River Unconstrained 5 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Assumptions (continued) • Palo Verde West limited to 3600 MW • All 500 kV line ratings are respected • Mohave out of service • Mountainview, Palomar, and Otay Mesa in- service • Additional renewables in California to meet Renewable Portfolio Standard of 20% 6 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Sequence Studied • Step 1: Add EOR 9000 project (Mead- Perkins and Navajo-Crystal Upgrade) • Step 2: Add Moenkopi-Eldorado series capacitor upgrade • Step 3: Add Palo Verde-Devers #2 7 \CAISO\jmiller MSC Meeting, 1/18/2005

DC Intertie IPP DC DC California Independent 500 kV System Operator 345 kV West 230 kV of Northern Nevada East River California of River Southern California Arizona Today’s Limits Palo Verde West Mexico 8 \CAISO\jmiller MSC Meeting, 1/18/2005

DC Intertie IPP DC DC California Independent 500 kV System Operator 345 kV West 230 kV of Northern Nevada East River California of River Southern California Arizona June 2006 Limits After Path 49 Palo Verde West Mexico Upgrades 9 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Step 1 - Implement EOR 9000 • Increased capability of Mead-Perkins from 1238 MW to 1905 MW • Increased capability of Navajo-Crystal from 1411 MW to 1808 MW • Increased East of River path rating from 8055 MW to 9300 MW 10 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator East of River EOR Flow - Before and After Upgrade No Upgrade With Upgrade 10000 9000 8000 7000 6000 Flow (MW) 5000 4000 3000 2000 1000 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 11 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator West of River WOR Flow - Before and After Upgrade No Upgrade With Upgrade 14000 12000 10000 8000 Flow (MW) 6000 4000 2000 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 12 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Palo Verde West PV West & PV Devers Flow - Before and After Upgrade No Upgrade With Upgrade 4000 3500 3000 2500 Flow (MW) 2000 1500 1000 500 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 13 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Perkins-Mead 500 kV Perkins to Mead Flow - Before and After Upgrade No Upgrade With Upgrade 2500 2000 1500 Flow (MW) 1000 500 0 -500 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 14 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Navajo-Crystal 500 kV Navajo to Crystal Flow - Before and After Upgrade No Upgrade With Upgrade 1800 1600 1400 1200 Flow (MW) 1000 800 600 400 200 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 15 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Moenkopi-Eldorado 500 kV Moenkopi to Eldorado Flow - Before and After Upgrade No Upgrade With Upgrade 1800 1600 1400 1200 Flow (MW) 1000 800 600 400 200 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 16 \CAISO\jmiller MSC Meeting, 1/18/2005

W ith u p g ra d e - S C IT v s . E O R SCIT Nomogram Flows California Independent System Operator 1 8 0 0 0 1 6 0 0 0 1 4 0 0 0 Southern California Import 1 2 0 0 0 1 0 0 0 0 8 0 0 0 6 0 0 0 4 0 0 0 2 0 0 0 0 0 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 1 0 0 0 0 E a s t o f R iv e r 17 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator EOR 9000 Observations • EOR flows increase by approximately 1000 MW to 9000 MW • WOR reaches 11,800 MW • PV West is heavily congested (30% of the time) • Perkins-Mead remains congested even after the upgrade to 1905 MW (8% of the time) • Moenkopi-Eldorado is heavily congested (35% of the time) 18 \CAISO\jmiller MSC Meeting, 1/18/2005

DC Intertie IPP DC DC California Independent 500 kV System Operator 345 kV 230 kV Northern Nevada East California of River Southern California Arizona 2008 Limits After EOR 9000 Palo Verde West Mexico 19 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Step 2 – Upgrade Moenkopi-Eldorado • Increase capability of Moenkopi-Eldorado from 1645 MW to 2000 MW 20 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Moenkopi-Eldorado 500 kV Moenkopi to Eldorado Flow - Before and After Upgrade No Upgrade With Upgrade 2500 2000 1500 Flow (MW) 1000 500 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 21 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator East of River EOR Flow - Before and After Upgrade No Upgrade With Upgrade 10000 9000 8000 7000 6000 Flow (MW) 5000 4000 3000 2000 1000 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 22 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator West of River WOR Flow - Before and After Upgrade No Upgrade With Upgrade 14000 12000 10000 8000 Flow (MW) 6000 4000 2000 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 23 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Palo Verde West PV West & PV Devers Flow - Before and After Upgrade No Upgrade With Upgrade 4000 3500 3000 2500 Flow (MW) 2000 1500 1000 500 0 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 24 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Perkins-Mead 500 kV Perkins to Mead Flow - Before and After Upgrade No Upgrade With Upgrade 2500 2000 1500 Flow (MW) 1000 500 0 -500 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% % hours above Flow 25 \CAISO\jmiller MSC Meeting, 1/18/2005

W ith u p g ra d e - S C IT v s . E O R SCIT Nomogram Flows California Independent System Operator 1 8 0 0 0 1 6 0 0 0 1 4 0 0 0 Southern California Import 1 2 0 0 0 1 0 0 0 0 8 0 0 0 6 0 0 0 4 0 0 0 2 0 0 0 0 0 1 0 0 0 2 0 0 0 3 0 0 0 4 0 0 0 5 0 0 0 6 0 0 0 7 0 0 0 8 0 0 0 9 0 0 0 1 0 0 0 0 E a s t o f R iv e r 26 \CAISO\jmiller MSC Meeting, 1/18/2005

California Independent System Operator Moenkopi-Eldorado Upgrade Observations • EOR flows increased from 9000 MW to 9300+ MW • WOR not significantly changed (11,800 MW) • Palo Verde West is heavily congested (35% of the time) • Perkins-Mead is heavily congested (20% of the time) 27 \CAISO\jmiller MSC Meeting, 1/18/2005

DC Intertie IPP DC DC California Independent 500 kV System Operator 345 kV 230 kV Northern Nevada East California of River Southern California Arizona 2008 Limits After Moenkopi- Palo Verde West Mexico Eldorado Upgrade 28 \CAISO\jmiller MSC Meeting, 1/18/2005