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August 28, 2024

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School Buses Uniquely Suited to V2G Technology, CT Green Bank Says

The CT Green Bank told Connecticut regulators Thursday that they should look closely at vehicle-to-grid (V2G) technology for the state’s school bus fleet in their investigation of medium- and heavy-duty electric vehicle (M-HDEV) integration into the power grid.

“There is potential for electric school buses to play a role in reducing peak demand and increasing resiliency of our communities,” CT Green Bank CEO Bryan Garcia said during a Public Utilities Regulatory Authority hearing for the investigation (Docket 21-09-17).

But Garcia also urged regulators to be patient when considering technologies that affect school children.

“We wanted to note that when we think about electric school buses as resources, we need to crawl before we walk and walk before we run,” Garcia said.

In May, Gov. Ned Lamont signed a bill that sets deployment targets for zero-emission school buses of 100% by 2030 for environmental justice communities and 100% by 2040 for all communities.

“School buses, uniquely, have predictable charging locations and times, which can allow them to [support the grid] without negatively impacting their operating schedules and their use as a transit asset,” Sara Harari, associate director of innovation and special advisor to the president at CT Green Bank, said in hearing testimony.

Coordinating and deploying V2G technology for electric buses and other M-HDEVs would support the authority’s goals of integrating new transportation loads and distributed energy resources into the grid cost-effectively, according to Harari. It would simultaneously lower the cost of the state’s energy transition by delaying or avoiding infrastructure upgrades, she said.

The benefits of V2G for the grid would also come with challenges.

“For all M-HDEVs, including school buses, the additional [charge and discharge cycles] required to participate in V2G accelerates the degradation of the battery, thus shortening the useful life of the vehicle,” she said. The frequency of kilowatt hours discharged with V2G participation, she added, could also reduce the EV warranty coverage.

Realizing a V2G school bus fleet will require utilities to have a much better understanding of the temporal and locational needs of the grid, Harari said.

“The Green Bank is not aware of either of the Connecticut-based utilities having this capability today,” she said.

Garcia pointed to the authority’s recently established Innovative Energy Solutions program as the right place for the state’s utilities to test managed charging and discharging for electric school buses. PURA tasked the utilities with administering the program in collaboration with the authority and stakeholders to innovate within the electric sector to meet state climate goals.

In its order establishing the innovation program, PURA estimated that the utilities would issue the first program solicitation in January. Pilot projects chosen under the program will have a $5 million maximum potential award.

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Baker Signs Bill to Boost Clean Energy in Mass.

After a few days of wavering, Massachusetts Gov. Charlie Baker signed a compromise climate and clean energy bill sent to his desk by the state legislature.

The wide-ranging bill, a follow-up to last year’s legislation setting emissions targets, aims to act on those goals by reducing emissions in the state from generation, transportation, buildings and more, with a heavy focus on offshore wind.

The new law removes the price cap for wind developers, while also adding new tax incentives, grants and loans for the industry. And it will enable the state to work with other New England states and the federal government to procure transmission for offshore wind.

“The sweeping energy bill signed into law today showcases why Massachusetts continues to be a national leader in offshore wind development,” said John Begala, vice president of federal and state policy at the Business Network for Offshore Wind. “The procurement reforms and historic investments will help the state fully realize … economic and environmental benefits, leading to a stronger offshore wind industry with greater job creation, new economic activity, and a more reliable and affordable power sector.”

The law also takes on transportation emissions, banning the sale of new gas-powered vehicles after 2035, requiring the installation of new charging stations across the state and updating Massachusetts’ electric vehicle rebate to include more eligible vehicles. (See Mass. Legislators Reach Deal on Clean Energy Bill.)

The EV portions have excited advocacy groups like the Green Energy Consumers Alliance, as well as those in the private sector who are seeing growing business from the early days of the state’s EV boom.

In a recent interview with RTO Insider, Matthew Guarracino, the CEO of Lynnfield-based JM Electrical, said that his firm has been seeing more and more demand for charging infrastructure installations. The new law will only increase that, he said.

“The vehicles are one half of it, and the vehicles are great, but the challenge is getting the infrastructure put in the same places as the vehicles. The infrastructure is lagging a bit behind,” Guarracino said. “So it’s great to see the federal government and state putting money behind this to move along that infrastructure.”

One of the bill’s most controversial provisions, which almost led Baker to sink it, will let 10 communities in Massachusetts ban fossil fuel hookups in new construction, in an attempt to reduce emissions from buildings.

That section, along with the rest of the bill, has enthused environmental advocates.

“This bill is a big deal,” Ben Hellerstein, state director for Environment Massachusetts, said in a statement. “With this bill becoming law, leaders in Massachusetts of all political stripes are showing that states can take meaningful climate action. This bill gives me hope that we can work together to build a future where all of us can thrive. We’re thrilled for our commonwealth to play a key role in building a world powered by 100% clean energy.”

Baker had tried to make several significant amendments, including to weaken the fossil-free building pilot, in the waning hours of the legislative session. But lawmakers left most of them on the table and sent it back to the governor’s desk for a signature or veto.

The governor eventually signed, but not without regrets.

“Because the legislature rejected virtually every meaningful amendment I put forth, this bill does not have the same shared sense of purpose that all previous climate legislation embodied, which is unfortunate,” he wrote in a signing letter.

“We all know the commonwealth faces significant challenges in dealing with two existential threats: climate change, and housing supply and affordability. This bill does not move Massachusetts in the right direction on housing. And the process by which many provisions in this bill are implemented will determine if this bill will make significant progress toward our climate goals,” Baker continued.

Funding for parts of the bill is also still wrapped up in a separate piece of legislation that failed to make it past the legislative deadline, but key lawmakers say they’re confident it will come together in informal sessions over the coming weeks.

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SPP Restricts Board, RSC In-person Attendance

SPP said Tuesday that it is limiting attendance at its in-person Board of Directors, Members Committee and Regional State Committee meetings scheduled for October at its Little Rock, Ark., headquarters.

Citing a recent rise of COVID cases in Arkansas and the disease’s persistence, the grid operator said it will restrict access to “rostered members” of the groups and a “handful” of SPP support staff.

“We did not make this decision lightly,” SPP said in an email to stakeholders. “We want to protect the health of our stakeholders and mitigate risk for our staff working on campus. We will miss the opportunity to see some of you in person.”

The RTO said it will stream the meetings for its stakeholders, promising an “immersive experience for those who attend virtually.”

Arkansas’ COVID case count has grown to more than 900,000, about 30% of the state’s population. The average daily increase over a rolling seven-day period recently fell to 962, its lowest level since early July. Only about half of the state’s residents are vaccinated.

The in-person meeting, although lighter in numbers, will be the groups’ second since January 2020. They last met together in Dallas in April.

Under SPP’s new meeting schedule, the board and RSC will alternate in-person and virtual meetings with the Markets and Operations Policy Committee and Strategic Planning Committee each quarter. The two committees met in Denver in July; they are scheduled to next meet in-person this January in Oklahoma City.

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DOE Previews New Federal Funding for Energy Storage Demo Projects

The Biden administration’s goal that the U.S. economy achieve net-zero carbon emissions by 2050 will require an investment of $300 billion a year until 2050, or $10 trillion in total, the U.S. Department of Energy estimates, including $21.5 billion to support large-scale clean energy demonstration projects.

Effectively allocating the $355 million in initial funding, authorized by last year’s Infrastructure Investment and Jobs Act, is the task now facing DOE, Katrina Pielli, senior policy adviser at the department’s Office of Energy Efficiency and Renewable Energy, said during a webinar Tuesday presented by the Clean Energy States Alliance with the DOE and the Sandia National Laboratories. The session drew several hundred spectators.

The department is taking time to develop “front-end planning” to help the industry develop storage projects that will be able to meet congressional expectation, Pielli said, adding that it is currently estimating it will begin accepting applications later this quarter.

“We’re maintaining a risk-balanced, defensible portfolio of investments. And what this means is that we will be reviewing project applications to ensure those selected for these demonstrations are viable at scale and they’re replicable. We want to scale down risk so we can scale up the clean energy technology deployment,” she said.

The agency will be making awards with 50-50 cost-sharing agreements, she added. “We’ll take early steps to set up these demonstrations, and our industry partners will assist with the steps that lead to commercialization and deployment,” she explained.

The law requires DOE to focus on rural areas with populations of less than 10,000, disadvantaged urban areas and former mining sites for potential projects.

“Congress did direct us to prioritize job creation, greenhouse gas emission reduction and the economic benefits for host communities. Here again, we’re working closely with our National Labs to understand the technical, regulatory and economic challenges associated with clean energy development on mined land,” Pielli said.

Dan Borneo, an engineering project leader at Sandia, said the goal is to reduce storage costs by 90% compared to the baseline cost for lithium-ion storage in 2020, to 5 cents/kWh, he said.

“For all the different storage technologies that are out there that could be used for grid storage, none of them currently meet a 5-cents/kWh levelized cost of storage. None of the technologies are there yet, which is why we need more investment and more demonstrations at scale,” he said.

“We are looking at targeting technologies in that realm with easy demonstration, all the way through more mature technologies that have already been proven, but may still need to be piloted in new or new regions that have not yet seen storage.”

Borneo said the lab will be funding demonstration storage programs for DOE and the Defense Department. “We’re looking at reasonably small behind-the-meter systems that can prove long-duration energy storage for a specific resilience application.”

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Hearing Shows Solar Conflict in Sun-soaked Eastern Wash.

A proposed massive solar farm is stirring controversy in southeastern Washington, pitting farmers and unions against local officials and the region’s Republican Party, while another similar project looms on the horizon.

Both projects are in the northwest corner of Benton County, just a few miles from four similar solar projects in neighboring Yakima County. All six are proposed for the same chunk of desert-like steppe habitat in the Yakima River Valley that crosses the line between the two counties. 

Benton County is home to the highly contaminated Hanford Nuclear Reservation, which is surrounded by pristine buffer zones, including Rattlesnake Ridge along the site’s western borders. The two Benton County solar farms are to be located west and southwest of the ridge on private farming and grazing areas.

On Monday, Washington’s Energy Facility Site Evaluation Council (EFSEC) held a public hearing in Pasco on a proposal by Innergex Renewable Energy to build the 470-MW Wautoma Solar Project just east of the Benton County line.

In Washington, an energy project developer has the choice of getting project approval from the state through EFSEC or from the host county. Innergex opted to go through EFSEC. 

Monday’s hearing turned out support from farmers in the immediate area and construction unions, and opposition from Benton County’s government and Republican Party.   

Québec-based Innergex is seeking to build the Wautoma project on 3,000 acres of sagebrush, of which less than 1% is being farmed. The project, which would include batteries capable of storing power for four hours, would be sited next to a major transmission line and is 30 to 40 miles from the nearest towns and cities. 

Laura O’Neill, Innergex senior environmental coordinator, said farm owners in the area are interested in the project and that the proposed site avoids environmentally sensitive lands. Western Hanford and the area west of the reservation are home to hundreds of elk, and the project’s fence would include openings for large animals to pass through.

Construction is scheduled to begin in the first quarter of 2024 and be completed by the third quarter of 2025. O’Neill said the project’s timetable and size could easily change during the design phase. 

‘Visual Pollution’

During Monday’s hearing, three members of the Robert family, which owns the 3,000 acres of primarily grazing land, lobbied EFSEC to support the Innergex proposal. Maya Robert said agricultural economics has been adversely affecting their ranching. “Solar power will help us make productive use of unproductive land,” she said.

Her uncle Robin Robert said roughly 800 sheep can share the land with the solar farm, with the animals using the panels for shade, making the project the Washington’s third proposal to develop agrivoltaics, the simultaneous use of solar panels with grazing or farming.

Stan Isley, representing the Yakima Valley Audubon Society, gave conditional support to the proposal, saying the developers must be careful of potential harmful effects to the wildlife and environment in that region.  Brendan Mercer, a neighboring grower of wine grapes, wanted to make sure the proposal’s effects on well water are studied and voiced concern about the impact of intense sunlight reflecting off panels on light-sensitive grapes.

“This proposal creates jobs and helps farmers. This is a very remote area,” said Stan Gasper, a Benton County resident. Four union leaders and members supported the project because its construction would employ hundreds, although only three to five permanent staff members would be needed after construction.

A woman representing the Benton County Republican Party opposed the project. “If you see a bunch of windmills and a bunch of solar panels, that’s visual pollution,” she said. There is an unrelated major wind and solar project several miles to the southeast within sight of the heavily populated Tri-Cities, which has sparked opposition because many residents don’t want to look at the wind turbines on their landscape.

Benton County resident George Penn opposed the Innergex project for visual reasons, arguing solar panels should be set up solely on the Hanford site, which is partially off-limits to the public. Area resident Lorre Gettre said farmers don’t always know the consequences of putting solar farms on their lands and voiced fears about the storage batteries leaking.

The Innergex site is on land zoned for agriculture. Last December, the Benton County Board of Commissioners — which vehemently opposes the wind and solar project south of the Tri-Cities — passed a law prohibiting large solar projects on agricultural lands. But Innergex argued Monday that the project is still consistent with Benton County’s comprehensive growth management plan.

Other Projects Loom

Meanwhile, a second solar farm is now in play for western Benton County.

Florida-based renewable energy company BrightNight confirmed to NetZero Insider Monday that it plans to build a 500-MW solar farm just south of Rattlesnake Ridge.  

The Hop Hill Solar project would be built on 17 square miles of cattle- and sheep-grazing land with the panels to cover about 30% of the site. The rest will be kept as grazing land, including the shady areas beneath the panels located eight to 10 feet above the ground, said Meribeth Sawchuk, BrightNight vice president of communications. While BrightNight has several projects on the drawing board across the nation, it has not yet completed any, she said.

No timetable has been set for the project. Unlike Innergex, BrightNight, plans to get approvals for its project from both the Benton County government and EFSEC. This will be the first renewable energy project in Washington to seek approval from both county and state governments. Swachuk said residents tend to be cautious about allowing solar farms on lands in their home counties. “It made more sense for us to coordinate with the county,” she said. 

All this is taking place as the Board of Yakima County Commissioners is considering whether to declare a moratorium on approving new solar farms as they examine the long-term impacts of this blossoming industry in the region.

Three of the four solar projects proposed for Yakima County are taking the EFSEC approval route, including two 80-MW solar farms by North Carolina-based Cypress Creek Renewables — High Top and Ostria — near the county’s eastern border.  

EFSEC is also considering whether it will approve at the 80-MW Goose Prairie solar farm by Seattle-based OneEnergy, while Yakima County is considering approval of the nearby 94-MW Black Rock project by California-based BayWa r.e. (See ‘Strength of Sunshine’ Brings Solar Projects to Wash. County.)

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DC Circuit Sends FERC Back to Drawing Board on MISO ROE

The long-running saga of the battle over MISO transmission owners’ return on equity continued Tuesday when the D.C. Circuit Court of Appeals vacated FERC’s 2020 order setting the rate at 10.02% (16-1325).

FERC must yet again determine what the just and reasonable ROE is in a case that has gone on for nearly a decade, with seven different commission chairs and three different presidential administrations (EL14-12, et al.).

In its ruling, the D.C. Circuit helpfully included a two-page-long chart (p.13-14) to show the three ROE figures FERC had set since November 2013, when MISO transmission customers complained that the then 12.38% rate was too high: 10.32% in 2016, 9.88% in 2019 and 10.02% in 2020. The fluctuating figures owed to the commission repeatedly changing the inputs for the complex formula that determines the ROE.

To get the latest figure, FERC used three different financial models — discounted cash flow (DCF), capital asset pricing (CAPM) and risk premium (RPM) — to determine a zone of reasonableness and set the ROE at its midpoint. (See FERC Ups MISO TO ROE, Reverses Stance on Models.) That reversed the commission’s previous stance against using the RPM just six months before, when it set the 9.88% ROE using only DCF and CAPM.

The court determined that was an arbitrary and capricious decision. It noted that in November 2019’s Opinion 569, FERC “spent several pages demonstrating the impressive extent of” the RPM’s deficiencies. But later in May 2020’s Opinion 569-A, “FERC changed its tune.”

“FERC is, of course, entitled to change its mind,” the D.C. Circuit said. “But to do so, it must provide a ‘reasoned explanation’ for its decision to disregard ‘facts and circumstances that’ justified its prior choice. Here, FERC failed to do that.”

In setting ROEs for private companies, like the MISO TOs, FERC essentially estimates what their stock price would be if they were publicly traded. Using the RPM, it estimates the cost of equity using the premium that investors would expect to earn on a stock investment over the return they would expect to earn on a bond investment.

In 2019, FERC argued, among many other things, that there was no evidence that investors used the RPM to make decisions and that the model takes into consideration previous ROEs, which may have been rendered unjust and unreasonable.

But in 2020, “FERC failed to adequately explain why it no longer mattered that investors don’t use this model,” the court said. “Instead, it simply noted that investors expect a premium on a stock investment over a bond investment, and that investors track the returns FERC allows. Both statements are true, but neither offers a persuasive reason to think that the risk premium model as FERC applied it here offers meaningful insight into investor behavior.”

FERC also failed to address the model’s circularity, the court said, merely stating that “all of the models contain some circularity.”

“That explanation doesn’t meaningfully engage with the ‘particularly direct and acute’ circularity problems presented by using old rates to set new ones,” the court said.

The D.C. Circuit did, however, dismiss the majority of the petitioners’ complaints about the 2020 order, including aspects of the DCF and CAPM and that the commission should have used the median of the zone of reasonableness, rather than the midpoint. The court found that these arguments conflicted with prior legal decisions on FERC’s ratemaking, but that the commission’s unjustified reversal on the RPM “is alone enough to make FERC’s rate orders arbitrary and capricious.”

FERC Chair Richard Glick, who had lambasted the then-Republican majority over the reversal, celebrated the court’s decision. “Reversing FERC on the risk premium model is a big win for consumers, helping make energy costs more affordable,” he tweeted.

With its order vacated, “FERC still lacks a judicially validated mechanism to set electric utility ROEs,” ClearView Energy Partners noted. “With the need to invest billions of dollars to upgrade the nation’s transmission system looming, FERC’s response will be closely watched by all stakeholders.”

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Akins Steps down as AEP President; Sloat to Become CEO

American Electric Power (NASDAQ:AEP) announced Wednesday that Nicholas Akins, CEO for the last 11 years, has resigned from his role as president of the company and been replaced by its current CFO, Julie Sloat.

In a brief press release, the Columbus-based utility said its board of directors would also promote Sloat as CEO beginning Jan. 1.

Sloat was named CFO in January 2021 after serving as a senior vice president of treasury and risk for two years and for nearly three years prior to that as president and COO of AEP Ohio.

AEP noted that Akins’ remaining time as CEO was part of the corporation’s “executive succession plan.” After Sloat takes over, he will become executive chair of the board, according to the release, and “will remain an executive and officer of the company.”

Akins has been president and CEO of AEP since 2011 and chairman of the board as well since 2014.

Nick Atkins (AEP) FI.jpgOutgoing AEP CEO Nicholas Akins | AEP

“Nick has transformed AEP during the 11 years that he has led the company. His focus on innovation, technology and modernization of the grid and AEP’s generation fleet is enabling clean, reliable and resilient energy to fuel growth in the communities that AEP serves,” Sara Martinez Tucker, lead director of the board, said in the release. “He also has built an open, collaborative culture that embraces diversity, equity and inclusion. AEP is fortunate that Nick has focused on developing a group of strong and capable leaders to ensure the company’s continued success.”

Akins praised Sloat as “an exceptional leader who has successfully led key strategic areas for the company. Her financial expertise and positive relationship with investors have been essential for the execution of our long-term strategy, enabling us to deliver strong earnings quarter after quarter while continuing to raise guidance and provide consistent dividend growth.”

“During her time as CFO, she has improved the financial performance of the company, and she also enhanced the performance and culture of AEP Ohio during the transition to competitive markets,” Tucker said. “The board is confident that she is the right person to lead AEP during this dynamic time for the industry and the company.”

Sloat initially joined AEP in 1999 as a credit risk analyst but left for 15 months in July 2008 to become vice president of investor relations job with Tween Brands, a clothing company. She returned to the utility in September 2009 as vice president of regulatory case management.

She has a bachelor’s degree in business administration with a double major in finance and economics and an MBA from Ohio State University. She completed the Nuclear Reactor Technology Program at the Massachusetts Institute of Technology.

“This is a time of tremendous change and opportunity for AEP as we invest in new energy technologies and infrastructure to provide clean and reliable energy to our 5.5 million customers,” Sloat said. “I’m honored to have the opportunity to lead an amazing team of nearly 17,000 employees.”

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NY Scorecard Makes Way for Utility-scale Agrivoltaics

New York’s upcoming annual solicitation for large-scale renewable energy may include a new siting scorecard that would encourage solar developers to build agrivoltaic strategies into their projects.

“Proposals with co-utilization commitments will receive favorable scoring credit, and these commitments will be included in the awarded agreements,” said Jeremy Wyble, senior project manager at the New York State Energy Research and Development Authority (NYSERDA).

The authority wants its expanded Smart Solar Siting Scorecard to “drive change” so that developers site “smarter” projects, Wyble said Tuesday during an American Solar Grazing Association webinar.

Comments on the proposed update to NYSERDA’s 2021 scorecard were due at the end of July, and Wyble said the goal now is to review those comments and include the updated version with the next Tier 1 solicitation for large-scale renewables. Tier 1 projects are designed to help New York’s load-serving entities meet the state’s Renewable Energy Standard requirements and can include solar, wind, geothermal, battery, hydro and geothermal technologies.

While NYSERDA included a simplified scorecard for submissions to last year’s Tier 1 solicitation, the authority used it mainly for informational purposes. This year, however, NYSERDA plans to require developers to submit the expanded 2022 version with their bids. It will “hold more weight” than it did last year, returning an actual score based on 160 total points, according to Jessica Bacher, executive director of the Land Use Law Center at Pace University. Bacher supported the authority’s efforts to update the scorecard.

Of the 160 points, 95 are allocated to agricultural protection, 35 to environmental protection of forested lands, 25 to community benefits and collaboration, and 5 for innovation. Developers would earn points for minimizing land impacts, which then would trigger certain strategies that are either mandatory or optional based on that land-use score.

Optional strategies would carry extra points that developers can earn by including them in their proposals to offset land-use impacts. There would be no points awarded for mandatory strategies.

The bulk of co-utilization strategies on the scorecard are optional because agrivoltaics is a new field, and it’s not “appropriate” yet to mandate them within the new scorecard incentivization structure, Bacher said.

The two mandatory co-utilization strategies on the scorecard are conducting a site survey or engaging landowners or farmers to assess feasibility and land suitability for production of preferred crops or vegetation species; and engaging the farming community to determine feasibility and solicit interest in grazing activities in or around the project.

High-scoring optional strategies include:

      • designing for the land’s current and future farming uses;
      • maintaining pollinator habitat, crop production or grazing in long-term project operations; and
      • incorporating regenerative farming practices, such as plant cover crops or low tillage, for maximum carbon sequestration.

Engagement with the community is a recurring theme in the scorecard, Bacher said.

NYSERDA plans to require developers to complete the scorecard for the upcoming solicitation if they are proposing to build a solar project with a capacity of 20 MW or larger on 100 acres or more.

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New England’s Reliability During Heat Wave Came with Emissions Spike

A huge bump in emissions, fueled by generating facilities burning through 6 million gallons of oil, was the price that New England had to pay for making it through last month’s heat wave without any significant grid reliability problems.

New data released by ISO-NE on Wednesday gave the latest illustration of the uncomfortable tradeoffs that the region faces when the weather causes high demand for electricity.

The six straight days of above-average heat was the longest such stretch in New England over recent years. Those days were responsible for much of a spike in oil consumption by power generators, which ISO-NE noted took place July 12-25.

Generators used about 6 million gallons of oil, with oil-fired generation accounting for up to 11% of the electricity produced in New England during some hours of the hottest days in that stretch.

Firing up those oil plants brought with it a huge jump in emissions: During the week of the heat wave, New England power plants emitted 845,967 metric tons of CO2, roughly 50% more than the same period last year and 17% more than a record-setting heat wave in 2021.

heat_wave_emissions (ISO-NE) Content.jpgGenerators burn more oil and, therefore, produce more emissions, when demand is high on New England’s grid. | ISO-NE

 

But the addition of oil generation did its job to steady the grid, and even with some unplanned outages, ISO-NE only had to issue an MLCC/2 alert, which lets resources know to hold off on testing or maintenance that might dent their availability.

“Our Operations staff managed the grid through teamwork, precise forecasting and rigorous planning, helping to ensure New Englanders had the electricity they rely on for their comfort, health and safety,” ISO-NE COO Vamsi Chadalavada said in a statement.

ISO-NE said that behind-the-meter solar production played a role in ramping down demand during the brightest daylight hours of the heat wave.

“On July 19, BTM PV generation reduced system demand by roughly 4,000 MW,” the grid operator said. “Without contributions from BTM PV, system demand would have approached levels forecast for weather much hotter and more humid than average.”

Where solar slowed down was where oil came in, during the late afternoon and evening hours.

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NRDC: Early Worries About ISO-NE’s Capacity Accreditation Approach

The Natural Resources Defense Council is urging ISO-NE to ensure that thermal resources get the same scrutiny as renewables, as the grid operator develops a new approach to capacity accreditation.

The environmental group has commissioned GE Energy Consulting to put together a full analysis of the options facing stakeholders and ISO-NE, but in the interim, it offered some early thoughts to the NEPOOL Markets Committee this week.

In a presentation, NRDC’s Bruce Ho and consultant Nick Pappas said that ISO-NE’s preferred method of measuring marginal reliability impact (MRI) risks under-valuing some components of clean energy resources’ contributions to reliability.

“Declining marginal value does not imply existing resources [are] no longer needed for reliability, [but] solely that additional resources of similar class provide less marginal benefit,” NRDC said in its presentation.

Ho and Pappas gave the example of a battery resource, developed in 2028 with an initial MRI of 90%. Under the average accreditation approach, which measures reliability contributions based on their share of their class’s (in this case, batteries) total reliability contribution, the MRI declines to 41% over a 15-year period.

Using marginal accreditation, which sets a resource’s accredited capacity based on the MRI of an incremental change in size, the MRI drops to 13%.

“Marginal accreditation omits about one-third of the resource’s total lifetime reliability contributions from a capacity awards standpoint,” NRDC said. “How does this omission impact policymaker and market participant incentives for clean energy investment?”

Later on, the presentation answered its own question: “If clean energy resources’ reliability values are undercompensated, ISO-NE [is] likely to see the development of sub-optimal resource mix.”

NRDC is planning to put forward the results of the GE analysis at the MC’s September meeting.

Other MC Business

In the second day of its two-day meeting, the committee also discussed:

  • proposed changes to the Generation Information System to sort and transfer screen enhancements, and an effort to accommodate hourly tracking;
  • modifications to the schedule for Forward Capacity Auction 18;
  • proposed revisions to enable do-not-exceed dispatch requirements for solar assets;
  • proposed revisions to clarify the calculation inputs to the capacity transfer right values for pool-planned units in the Forward Capacity Market settlement; and
  • proposed revisions to address the limited participation of storage-as-transmission-only assets in markets, including real-time energy market obligations, and metering requirements associated with storage operated as a transmission asset.