Simon Mahan Profile picture
Dec 1 9 tweets 3 min read
Next up at @infocast_events #sere22 Utilities' Carbon-Free Goals and Their Plans for Renewable Procurement feat. Georgia Power Company, Entergy, TVA, Green Power EMC #energytwitter ImageImage
GPC: Our IRP is every three years with lots of intervenors. We have a lot of load growth. Scenario planning is at the heart of the IRP. We take into a range of carbon costs. We're closing coal by '35. Adding 3GW of renewables and batteries.
Entergy: Our IRP is 4yrs. Commission doesn't approve the plan. Modeled 3 scenarios. Ref. Plan incl. 2.6 GW to be added by '25. 11 GW by 2042. Fuel cost savings across all three scenarios. Industrial customers want to reduce their CO2 emissions.
TVA: Last IRP was '19. We are increasing renewables and closing coal. Contracted 2.2 GW of solar. Kicking off new IRP. Carbon free RFP will help inform IRP. We've released a 5gw RFP.
GPEMC: If you've met one cooperative, you've met one cooperative. They're all different. Our purpose is to help aggregate for them. We're closing in on 2GW. Probably need to double it by 2030.
GPC: We got flexibility, adaptability, and controlability approved by the commission in the IRP, about 6GW by 2035. We'll have a new target in 2025 with new info. We'll have a capacity need by end of the decade.
Entergy: Our 475mw solar approved came from a 2020 rfp in a load pocket. The '21 RFP of 600mw for solar will be filed soon. The '22 RFP of 1500mw allows more bids elsewhere. IRP expects "sizable and frequent" RFP's, likely annual. PSC approval takes too long.
TVA: We're seeing land use constraints. There's misinformation regarding renewables. Renewables provide new tax base. Interconnection is also a challenge. Internally looking at transmission on where solar corridors could be.
GPC: Feedback is very important to us. We need "constructive friction".

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More from @SimonMahan

Dec 1
Here at @infocast_events #sere22 in Charlotte with regulators from AR, GA, MS, NC incl. @MPSCBrentBailey
@timechols (plz excuse my abbreviated summaries of their comments, these aren't verbatim) thread...
#energytwitter
NC: HB 951 70% carbon neutrality by 2030, neutrality by 2050 is driving force. Duke will own 55% of resources. Significant public process, hearings, data over the past year. Duke will procure 1200 MW of solar next year.
AR: AR Renewable Development Act encourages up to 20MW of development. Clean Energy Act encourages renewable development.
Read 19 tweets
Aug 31
"Simon, what's this all about alcohol, milk and electric transmission?" Sit back, I have a story to tell. And it's a doozie. #energytwitter
As you may or may not know, electric utilities build large scale power lines called transmission lines. These aren't the lines you see in your neighborhood; they're big lines to carry big power over long distances. But...
Some of those lines are so big, that in some regions of the US, planning for those transmission lines begins at the grid operator regional or interregional level, not the utility-level.
Read 17 tweets
Apr 30
Dispare and hopeless exist when folks aren't empowered. The constant singular focus on federal issues in the news cycle make "change" seem remote, unreachable. Folks, I have a great story to share. Five years ago, I helped save my city $120m. And like, 50 ppl know.

Thread...
I'm a Leslie Knope nerd. I read long and complicated documents and can sift through the BS to figure out what's "really" going on. Well, my local electric company was conducting studies on what sort of new power plant they'd like to build.
Thing of it, they're regulated by the city council, and the utility hadn't bothered to tell them they wanted to build a power plant. But I had the studies. First, they went to the city council and asked for a rate increase. They hadn't had one in a while, so the council approved.
Read 21 tweets
Mar 2
Tom Fanning, CEO from Southern Company ($SO), is taking a victory lap in this morning's WSJ Opinion Section: "states that have suffered the most" are in RTO's like @MISO_energy and @SPPorg. Why this letter? Why now? A thread 1/14

wsj.com/articles/elect…
A few years ago, $SO sold off Gulf Power to NextEra. $SO said it was for "strengthening our financial position", and now they're fighting RTO's? What's going on? 2/14
$SO appears to be struggling. Between the $30b Vogtle (GA) nuclear reactor and the failed Kemper "clean coal" plant (MS), that the DOJ is investigating for $300m in misspent federal funds, things don't seem all that peachy. 3/14
Read 15 tweets
Oct 22, 2021
How do utilities plan for more renewables? Glad you asked. It's called an integrated resource plan, or IRP. IRP's are essentially complicated math problems, forecasting into the future, sometimes up to 20 years. I'll use Entergy Arkansas' latest IRP as an example. 1/ Image
First, utilities will forecast the power needs for their territory (load forecast), and often will include some narrative "scenarios" - what if power needs are lower than expected (because of energy efficiency, perhaps)? 2/ Image
What if power needs are higher than expected (maybe because of electric vehicle growth)? They'll set a reference case and several high/low scenarios to catch a range. 3/ Image
Read 16 tweets
Jul 12, 2021
Happy #ATBDay to all you #energytwitter nerds out there. Let's do a thread on how important the ATB and @NREL are. 1/16
The NREL Annual Technology Baseline, or ATB as the cool kids call it, is the only PUBLICLY accessible set of multiple generation tech FORECASTS for both PERFORMANCE and PRICING for GEOGRAPHICALLY SPECIFIC resources. It's also EDITABLE and TRANSPARENT. 2/16
PUBLIC DATA MATTERS - A lot of utilities use in-house or purchased generation tech data that are opaque and don't include all the financial assumptions ATB does. Here's onshore wind's assumptions. 3/16
Read 17 tweets

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