Introduction to Renewable Energy in Nebraska
Following the unanimous approval by Lancaster County commissioners of a 304-megawatt solar plant outside Lincoln, one of the largest in the state, local opponents appealed. The project’s developer, the Florida-based behemoth NextEra Energy Resources, made news in March when its CEO both praised the Trump administration’s policy and insisted that solar and storage remained the fastest path to increasing the energy supply.
The Challenges of Renewable Energy
Nebraska is, after all, a red state, where only an estimated 66% of adults think global warming is happening, according to a survey from the Yale Program on Climate Change Communication. President Trump won almost 60% of the vote statewide, though only 47% of the vote in Lancaster County—a purple dot in a sea of red.
“There are no simple answers,” says Anyanwu, with characteristic measure. “In our industry there’s a lot of people trying to win an ideological debate, and they insist on that debate being binary. And I think it should be pretty clear to most of us—if we’re being intellectually honest about this—that there isn’t a binary answer to anything.”
The New Technical Frontier
What there are, are questions. The most intractable of them—how to add capacity without raising costs or carbon emissions—came to a head for LES starting in April 2024. Like almost all utilities in the US, LES relies on an independent RTO, or regional transmission organization, to ensure reliability by balancing supply and demand and to run an electricity market (among other roles). The principle is that when the utilities on the grid pool both their load and their generation, everyone benefits—in terms of both reliability and economic efficiency.
Understanding the Grid
“Think of the market like a potluck,” Anyanwu says. “Everyone is supposed to bring enough food to feed their own family—but the compact is not that their family eats the food.” Each utility must come to the market with enough capacity to serve its peak loads, even as the electrons are all pooled together in a feast that can feed many. (The bigger the grid, the more easily it absorbs small fluctuations or failures.)
The Challenges of Wind and Solar
But today, everyone is hungrier. And the oven doesn’t always work. In an era when the only real variable was whether power plants were switched on or off, determining capacity was relatively straightforward: A 164-megawatt gas or coal plant could, with reasonable reliability, be expected to produce 164 megawatts of power. Wind and solar break that model, even though they run without fuel costs (or carbon emissions). “Resource adequacy,” as the industry calls it, is a wildly complex game of averages and expectations, which are calculated around the seasonal peaks when a utility has the highest load.
The Impact of Weather
On those record-breaking days, keeping the lights on requires every power plant to show up and turn on. But solar and wind don’t work that way. The summer peak could be a day when it’s cloudy and calm; the winter peak will definitely be a day when the sun sets early. Coal and gas plants are not without their own reliability challenges. They frequently go offline for maintenance. And—especially in winter—the system of underground pipelines that supply gas is at risk of freezing and cannot always keep up with the stacked demand from home heating customers and big power plants.
Politics had suddenly become beside the point; the new goal was to keep the lights—and the AI data centers—on.
Adapting to Change
Faced with a rapidly changing mix of generation resources, the Southwest Power Pool (SPP), the RTO responsible for a big swath of the country including Nebraska, decided that prudence should reign. In August 2024, SPP changed its “accreditations”—the expectation for how much electricity each power plant, of every type, could be counted on to contribute on those peak days. Everything would be graded on a curve. If your gas plant had a tendency to break, it would be worth less. If you had a ton of wind, it would count more for the winter peak (when it’s windier) than for the summer. If you had solar, it would count more in summer (when the days are longer and brighter) than in winter.
Conclusion
The shift towards renewable energy sources is a complex and challenging process, but it is essential for reducing carbon emissions and mitigating the effects of climate change. As the energy landscape continues to evolve, it is crucial for utilities, policymakers, and industry leaders to work together to ensure a reliable and efficient energy supply.
FAQs
Q: What is the largest solar plant in Nebraska?
A: The 304-megawatt solar plant outside Lincoln is one of the largest in the state.
Q: What is the role of the Southwest Power Pool (SPP)?
A: The SPP is a regional transmission organization responsible for ensuring reliability and running an electricity market in a big swath of the country, including Nebraska.
Q: How do wind and solar energy affect the grid?
A: Wind and solar energy are intermittent sources of energy that can make it challenging to determine capacity and ensure reliability, but they also offer significant benefits in terms of reducing carbon emissions and fuel costs.
Q: What is "resource adequacy"?
A: Resource adequacy refers to the ability of a utility to meet its peak demand for electricity, taking into account the availability and reliability of different generation resources.
