failure and lessons - iogcc.ok.gov
TRANSCRIPT
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The Feb ‘21 ERCOT Grid Failure and Lessons
Presentation by Gregg Goodnight at IOGCC Santa Fe Conference, 11/9/21
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The Feb ‘21 ERCOT Grid Failure Focus of Today’s Presentation
➢Review of Causes, Immediate and Systemic➢Renewable Energy Intermittency➢Future of Texas Grid and Public Policy Impacts
Gregg Goodnight, TRCS and CO2 Coalition Member
Dispatchable power: When You Need it, You Need it!
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Feb ‘21 Outage – TRCS Lessons Learned
1. Reliability of the ERCOT electrical grid is being slowly compromised by the cumulative impact of public policy favoring renewable energy additions
2. Intermittency is an inherent aspect of renewable power and needs to be addressed by public policy
3. Adequate levels of dispatchable power need to be maintained through appropriate policy for power pricing
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The ERCOT System
Source: ERCOT
+ 1,800 Participants86 GW demand at peak+710 generation units+46,500 miles HV transmission lines+ $0.7 billon new trans. projects 2020 ($8B total)
ERCOT
Grid Facts Renewables
Texas leads US in wind capacity (30GW); 20% of US13,000 turbines, 150 farms Record 23.6 GW (25Jun21) Grid solar 4.9 GW capacity (growing to 19 GW by ‘25)Batteries 0.3 GW capacity
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ERCOT Power Supply - 2020
SourceCapacity, GW
Avg. Utilization
TWh/yr Avg. GW%
Nominal Capacity
% of Delivered
Power
Wind 31.4 31.7% 871 9.9 28.1% 22.9%
Solar 4.9 20.3% 87 1.0 4.4% 2.3%
Hydro 0.5 26.5% 12 0.14 0.5% 0.3%
Coal 13.5 57.7% 685 7.8 12.1% 18.0%
Natural Gas 56.1 35.3% 1,738 19.8 50.3% 45.6%
Nuclear 5.1 91.8% 415 4.7 4.6% 10.9%
Total 111.7 38.9% 3,809 43.4 100% 100%
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ERCOT Power Supply - 2020
SourceCapacity, GW
Avg. Utilization
TWh/yr Avg. GW%
Nominal Capacity
% of Delivered
Power
Wind 31.4 31.7% 871 9.9 28.1% 22.9%
Solar 4.9 20.3% 87 1.0 4.4% 2.3%
Hydro 0.5 26.5% 12 0.14 0.5% 0.3%
Coal 13.5 57.7% 685 7.8 12.1% 18.0%
Natural Gas 56.1 35.3% 1,738 19.8 50.3% 45.6%
Nuclear 5.1 91.8% 415 4.7 4.6% 10.9%
Total 111.7 38.9% 3,809 43.4 100% 100%
Average load is 43GW and capacity is 112GW, the issue is generating power as you need it and where you need it
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ERCOT Power Supply - 2020
SourceCapacity, GW
Avg. Utilization
TWh/yr Avg. GW%
Nominal Capacity
% of Delivered
Power
Wind 31.4 31.7% 871 9.9 28.1% 22.9%
Solar 4.9 20.3% 87 1.0 4.4% 2.3%
Hydro 0.5 26.5% 12 0.14 0.5% 0.3%
Coal 13.5 57.7% 685 7.8 12.1% 18.0%
Natural Gas 56.1 35.3% 1,738 19.8 50.3% 45.6%
Nuclear 5.1 91.8% 415 4.7 4.6% 10.9%
Total 111.7 38.9% 3,809 43.4 100% 100%
Intermittent power was 25% of delivered
power in 2020
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ERCOT Power Supply - 2020
SourceCapacity, GW
Avg. Utilization
TWh/yr Avg. GW%
Nominal Capacity
% of Delivered
Power
Wind 31.4 31.7% 871 9.9 28.1% 22.9%
Solar 4.9 20.3% 87 1.0 4.4% 2.3%
Hydro 0.5 26.5% 12 0.14 0.5% 0.3%
Coal 13.5 57.7% 685 7.8 12.1% 18.0%
Natural Gas 56.1 35.3% 1,738 19.8 50.3% 45.6%
Nuclear 5.1 91.8% 415 4.7 4.6% 10.9%
Total 111.7 38.9% 3,809 43.4 100% 100%
Natural gas expected to be <30% by 2025
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ERCOT Power Supply - 2020
SourceCapacity, GW
Avg. Utilization
TWh/yr Avg. GW%
Nominal Capacity
% of Delivered
Power
Wind 31.4 31.7% 871 9.9 28.1% 22.9%
Solar 4.9 20.3% 87 1.0 4.4% 2.3%
Hydro 0.5 26.5% 12 0.14 0.5% 0.3%
Coal 13.5 57.7% 685 7.8 12.1% 18.0%
Natural Gas 56.1 35.3% 1,738 19.8 50.3% 45.6%
Nuclear 5.1 91.8% 415 4.7 4.6% 10.9%
Total 111.7 38.9% 3,809 43.4 100% 100%
Nuclear supplies baseload power
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Current PUC Pricing Policy
➢“Energy Only”, payment for delivered power. Day-ahead bidding for supply of regional power; no capacity component for pricing
Market design after deregulation in early 2000’s:
➢Texas is not in total control: Impact of Federal Production Tax Credits and Investment Credits and Carbon Offsets distort market
➢Intent →Market signaling pricing supporting re-investment
➢Reality →Emergency pricing with short-term spikes. $9,000 MWh
Along with the PTC and Carbon Offset pricing, Federal Investment Tax Credits
of 26-30% over the last 20 years has had a cumulative impact on pushing new capacity almost exclusively towards
renewable power additions
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➢The week ahead – warnings that this was going to be bad! Peak load near 75GW.
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2021 Grid Outage- Big Picture
➢Maintenance outages for coal/gas deferred from fall ‘20 – lack of manpower due to COVID restrictions (10-12GW unavailable power from thermals including coal, and gas)
Pre-storm Activity
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2021 Grid Outage- Big PictureCritical Period
Storm Uri Late 2/14 to Early 2/15
➢ 76.8GW Load seen! Load shedding late evening ➔ Ramp up of dispatchable power as wind and solar 9.1GW➔ 5.3GW
➢ Dispatchable power supply trips
➢ Loss of frequency control
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House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
Source: ERCOT
Fre
qu
en
cy, H
z
Time, February 15, 2021, AM
Loss of Frequency Control
1:23 2:031:531:431:33
60.0
59.4
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Immediate Cause of Failure
During critical period from 01:00AM to 02:00AM on 2/15/21, lack of
dispatchable power combined with increasing system load and loss of
power from wind resulted in loss of control of system frequency
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Spin and Public Perception
Texas legislative hearings → focus on lack of winterization following the 2011 freeze: not mandatory, not strong enough
“The focus on wind is a red herring”- Dan Cohan, Rice U.
“The extreme cold is causing the entire system to freeze up” – Jason Bordoff, Columbia U.
“…take a hard look at the state’s deregulated marketplace and fix its flaws”. - Dave Lieber, Dallas Morning News, 2/19/21
“The blame falls on Abbott.” “Please do not fall for Abbott’s tricks” – Democratic Party Chair Gilberto Hinojosa
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Spin and Public Perception“… it was natural gas that basically shut down in Texas that caused all of that of that horrible carnage for people, it was awful.” CNN Interview – 9/12/21Senator Joe Manchin, D, West Virginia
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Power Contributions
0%
20%
40%
60%
80%
100%
120%
14:0015:0016:0017:0018:0019:0020:0021:0022:0023:00 0:00 1:00 2:00 3:00
Wind
Natural Gas
Solar
Nuclear
Coal
2/14/21 2/15/21
Critical Period
Source: ERCOT data and TNRCC calculations
Op
era
tin
g R
ate
%
Nam
ep
late
Cap
acit
y
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Dispatchable vs Weather Dependent Power
0%
20%
40%
60%
80%
100%
120%
14
:00
15
:00
16
:00
17
:00
18
:00
19
:00
20
:00
21
:00
22
:00
23
:00
0:0
0
1:0
0
2:0
0
3:0
0
4:0
0
5:0
0
6:0
0
7:0
0
8:0
0
9:0
0
10
:00
11
:00
12
:00
13
:00
14
:00
15
:00
16
:00
17
:00
18
:00
19
:00
20
:00
21
:00
22
:00
23
:00
24
:00
Sunday, 2/14/21 Monday, 2/15/21 AM
Composite Wind and Solar
28%14%
0.8GW 2%
Coal, gas, nuclear rates adjusted for maintenance outages
Source: ERCOT
Coal, gas, and nuclear rates, not adjusted for maintenance outages
Op
era
tin
g R
ate
, % o
f N
ame
pla
te C
apac
ity
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Texas Wind Impact during Storm Uri
0
5
10
15
20
25
30
35
Avg
Win
d V
elo
city
, MP
H
Corpus Christi
Amarillo
Weighted Avg
February 14, 2021 February 15, 2021
Wind Power is a function of the cube
of velocity!
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Northern Hemisphere Pressure Anomaly
North America
Sea Level, Feb. 14-18, 2021 mb
Hig
h P
ress
ure
Low
Pre
ssu
re
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High Pressure Over North America
➢After Uri moved through, wind turbines were idled all the way up to Canada, including fully winterized units
➢A high-pressure front stabilized over Texas and the US plains region
➢High pressure weather patterns are common in both winter and summer and impact wind velocities
Hig
h P
ress
ure
Low
Pre
ssu
re
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Instability - Minor Contributors
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
➢Freezing of wind turbines
➢Freezing of gas wells
➢Nuclear reactor outage
➢ERCOT not connected to national grids
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Issues with Thermal Power
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
➢Lack of proper prioritization of supply of electricity to NG supply chain, heat tracing/compressors. Magnitude?➢Natural gas supply to a power plant was shut due to
interruptible power contract➢One plant incurred low voltage trip ahead of a frequency trip➢Coal in railroad cars iced over➢Poor timing of shutdowns, e.g. pigging of NG supply line➢Net impact of low NG header pressures?➢Too many plants in planned outages
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Calls to Fix the Grid
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
➢Hearings held in Texas House (2/25-26) and US House (3/24)
➢Focus on 2011 freeze and need for “winterization”
➢Texas Legislature passes non-prescriptive SB3, (‘fix the grid’ bill). → broad authority to PUC to restructure power pricing policy.➢Gov. Greg Abbott issues a strong directive to fix underlying issues➢Multiple Federal initiatives in Washington have the potential to
totally impact the reliability of the ERCOT grid, especially a national renewable mandate (100% by 2035?)
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Intermittency of RenewablesTake-home messages for today!
➢Renewable intermittency was one of the three major components of ERCOT February ‘21 crash➢Wind and solar fed to the grid on an “as-available” basis➢Who owns this intermittent nature of renewables? – In practice,
costs and risks are socialized. Grid customers pay for the excess costs and bear incremental risks➢Who benefits? – In practice, electricity providers that market “100%
renewable energy” packages. Companies that tout 100% “clean” power.
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Intermittency of Renewables
➢Wind and solar advocates argue that all power sources are intermittent; they cite planned and unplanned thermal outages (gas/coal/nuclear) ➢This is a false equivalence➢Intermittent nature of wind and solar are
weather-related and non-controllable. They are routine on a daily, monthly, and seasonal basis. This is in addition to operational outages
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Engineering the Grid for Reliability➢ Intermittency of renewables must be addressed!➢ ERCOT is short a minimum of 10GW of dispatchable power➢ Berkshire Hathaway pitched addition of 10GW natural-gas
fired power if profitability is guaranteed ➢ Best technical solution may be RICE (Reciprocating Internal
Combustion Engines) like those seen at South Texas Electrical Co-op and City of Denton
➢ Requirements for new weather-dependent power sources to provide back-up at their own expense
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Feeding Electrons into the Grid; Are All Electrons the Same?
Current PUC pricing policy: All electrons fed into the grid are priced the same. There is no premium for consistency of output or dispatchability. External support from PTC’s and carbon credits tilt playing field
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Monthly Abilene Wind Speed
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election4
5
6
7
8
9
10
11
12
13
14
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg
win
d v
elo
city
, MP
H
2021 YTD
3-yr Avg.
Source: wunderground.com
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Example: August Doldrums
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
0
5
10
15
20
0:1
5
1:0
0
1:4
5
2:3
0
3:1
5
4:0
0
4:4
5
5:3
0
6:1
5
7:0
0
7:4
5
8:3
0
9:1
5
10
:00
10
:45
11
:30
12
:15
13
:00
13
:45
14
:30
15
:15
16
:00
16
:45
17
:30
18
:15
19
:00
19
:45
20
:30
21
:15
22
:00
22
:45
23
:30
GW
win
d
Reported Wind Power for ERCOT, August 2020
8/1/2020 8/15/2020 8/30/2020
Aug 15thAug 30th
Aug 1st
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UK Power Prices, 2021➢ UK coal consumption in ‘06 was
51MM MT, in ‘19 was 10MM MT with 70% imported
➢ UK power depends on wind turbines in North Sea
➢ Gas is the primary energy back-up for both UK and Europe
➢ Lack of power from low wind resulted in high demand for natural gas that was costly and unavailable
➢ Typical residential prices for power have been Euro100-200/MWh
➢ Gas-based chemical industry in the UK shut down due to non-competitive position
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Costs of Intermittent Operations
➢Capital cost of back-up power➢Higher transmission costs due to remote power sourcing➢Less timing flexibility of timing for coal, gas, and nuclear plants for
planned maintenance outages➢Higher unit fixed costs due to lower operating rates➢Reduced economics for disincentives for optimum maintenance
Are renewable power costs competitive? LCOE (levelized cost of energy)benchmark is cited.
Levelized Costs (LCOE) (from EIA or IRENA)
Estimates do not include these socialized costs
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House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 electionERCOT, EIA, TRCS
projections
Power Generation
38%
62%
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Federal Subsidies for Electrical Power
Source: TPPF, Federal Energy Subsidies and Support from 2010 to 2019, July 2020
$B Total Subsidies, 2010-2019
$34
$37
$15
$10
$5
Nuclear
US Power Supply, TWHr
7%
20%
24%7%
39%
Source: EIA, 2019 basis
Solar, 3% Wind
Nuclear
Hydro
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Conclusions 1
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
➢The Feb. ‘21 ERCOT grid outage had 3 immediate causes➢Such an event was likely inevitable due to replacement
of dispatchable power for intermittent power supply➢Favorable public policy→ explosive growth of wind and
solar to 25% of total power (2020), → +38% (2025)➢Deregulated power in Texas is not a free market➢“Temporary” Federal and State incentives have been
institutionalized
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Conclusions 2
House Process HR8019
Sponsor A.O. Cortex (D-NY)
Co-sponsor None
Introduced 8/11/20
Committee Referral Science, Space and Tech; Judiciary, Energy and Commerce, 3 others
Status Hasn’t made it out of committee
Prognosis Likely to be carried into the 117th Congress pending Nov ‘20 election
➢Growth of rooftop solar in Texas (ERCOT - 6GW) will provide additional challenges to balancing the grid➢The rush to shut down coal power must be stopped➢New federal legislation targeting 80% renewable power
by 2030 and 100% by 2035. This is suicidal!
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Gregg A. Goodnight
Nov 3, 2021
Born in Houston, TX, 70 years old. Retired, married to Nancy Hofer from PA, 46 years, 3 grown children
BS in Chemical Engineering, U. of Texas 1973MS in Chemical Engineering, U. of Pennsylvania, 1976
E.I. DuPont in Philadelphia, PA and LaPorte, TX (1973-1978)Monsanto/Solutia, Chocolate Bayou, TX (1978-2000)UBS Chemical Equity Analyst, Houston Tx, 2000-2013TZMI, Industry consultant for Chemicals, 2014-2017
Personal
Education
Employment
Current Interests
Hobbies
Climate change science and public policy implications, green energy impacts on society, alumni support for UT Dept of Chemical Engineering, TRCS and CO2 Coalition membership
Classical music and music performance, 40-year member and cello player for the Galveston Symphony Orchestra