White House Chronicle

News Analysis With a Sense of Humor

The Case for Prescribed Burning: Fighting Fire With Fire

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Wildfire takes no prisoners, has no mercy, knows no boundaries, respects no nation and is a clear and present danger this and every summer as summers grow drier and hotter.

The American West is burning; across Canada there are wildfires; and swaths of France, Spain, Portugal and Greece are ablaze. In 2022, faraway Siberia was ablaze.

California bears the scars of where wildfires and humans have collided and the humans and their homes have lost, recently and devastatingly in Los Angeles’ Pacific Palisades neighborhood. Experts say that even in the formerly moist East, conditions for wildfire are growing.

The damage to lives and livelihoods here and abroad is beyond calculation.

Olive oil and wine from Europe will be more expensive this year because so many trees and vines have burned. Humankind’s ancient enemy stalks the world: irrational, brutal and very hard to stop.

One of the largest U.S. electric utilities, Pacific Gas and Electric, facing an estimated $30 billion in liabilities from 2017 and 2018 wildfires believed to have been caused by their equipment, filed for bankruptcy protection in 2019. Utilities have been on the forefront of wildfire suppression because some fires are started by sparking from overhead lines.

An army of people and technology is deployed in the United States to fight wildfires and still it comes up short; these tools include AI and drones, aircraft and, of course, the indefatigable but inevitably limited intervention of firefighters on the ground.

There is an additional tool: Fighting fire with fire with so-called prescribed burning or controlled burning.

I learned about this technique from J. Morgan Varner, director of research and senior scientist at Tall Timbers in Tallahassee, Florida.

For 60 years, Tall Timbers, a nonprofit group, has been doing prescribed burning — the controlled application of fire to a specific area of land to achieve defined management objectives — in southern Georgia and northern Florida. Now their expertise on this traditional and effective tool for maintaining ecosystems and reducing wildfire risks is widely sought.

Even so, Varner said, the technique has its critics, mostly from those who have sought to suppress or avoid fire as the first line of defense.

Varner explained that this has led to decades of fuel (made up of dead trees and vegetation) accumulation on forest floors. When this burns, it burns with great heat and destroys everything; in a prescribed burn, the damage is less severe and more of a forest’s natural infrastructure survives.

I didn’t see a burn in progress, but I did see the aftermath of one on a hunting estate in southern Georgia, where the landlord worked with Tall Timbers. There was a strong smell of burning and some residual smoldering logs, but the land was ready for natural rejuvenation.

The idea is that with careful burning, the land is returned to its natural rhythm. This region of Georgia along the Florida border, known as the Red Hills, has seen controlled burning for a long time, and the forests and the wildlife are both healthy.

Wildlife is one of the concerns about deliberate burning, but Varner says animals are naturally fire sensitive and very adept at getting out of the way.

A prescribed burn is a carefully managed event. Conditions must be exactly right: wind, humidity, the nature of the vegetation and the amount of fuel on the ground.

Varner says that the ideal burn area is 40 acres, and burning is done in the spring or the fall, not in the summer heat. A team of experts surveys the area of the burn and calculates the behavior of the fire before ignition.

Although prescribed burning has ancient history and a lot of scientific evidence supporting it, it isn’t everyone’s solution. I asked the president of a West Coast utility about using it and got a curt reply: “No way.”

Looking at a beautiful stand of trees, I find it hard to imagine deliberately setting it alight. However, I am convinced that fire has to be used to fight fire and that periodically in nature there is wildfire, and it is part of a natural cycle. I’m beginning to take note of the dead trees among the living ones.

If summers get even hotter and drier, more radical solutions to fire will have to be employed, including fire.

Can Our Waterways Provide a New Source of Baseload Power?

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This article first appeared on Forbes.com

Virginia is the first state to formally press for the creation of a virtual power plant. Glenn Youngkin, the state’s Republican governor, signed the Community Energy Act on May 2, which mandates Dominion Energy to launch a 450-megawatt virtual power plant (VPP) pilot program.

Virginia isn’t alone in this endeavor, but it is certainly the most out front. There are many incipient VPPs clustered around utilities across the country.

A virtual power plant is the ultimate realization of something that has been going on for a long time as utilities have been hooking up various power sources, managed conservation and underused generation, known as distributed energy resources (DER). These, according to even small utilities, can contribute up to and possibly over 10 percent electricity to a utility system.

Organized and formalized and with enough coverage, DER becomes a VPP. Sometimes the terms are used interchangeably.

A virtual power plant not only depends on managed conservation and underused generation but also on some imaginative use of resources, like hooking up transportation fleets to discharge their batteries onto the grid when they aren’t in use. Electric school buses are frequently cited as playing a role in future VPPs. Conservation and solar roofs with related batteries are the backbone of DER and VPPs. Eventually, they are expected to be common to most utilities or consortia of utilities.

In Owings Mills, Maryland, an engineer and inventor with a slew of patents to his name, Key Han, dreams of a different kind of VPP, one which could, if widely deployed, provide a new source of baseload power.

Han, CEO and chief scientist at DDMotion, has pioneered speed-converter technology which, if widely deployed, would produce inexpensive, reliable energy in sufficient quantity to be described as baseload. Indeed, he said in an interview, “It would be a huge new source of baseload.”

Han’s technology converts variable energy inputs into constant speed outputs. For example, the flow of water in a stream is variable but with his speed-converter  technology, the energy in the flow can be captured and converted to a constant speed output.

With his technology, grid-quality frequency can flow from many sources without extensive civil engineering or major construction, he told me. In particular, Han cited non-power dams, like the ones in New England which were built in the 19th century to drive the textile mills.

“A simple harnessing module with a generator behind the spillway coupled with my technology can produce frequency that is constant and ready to go on the grid. If you have enough of these simple, low-cost generators installed, you have created a new baseload source, a virtual power plant of a different and exceptionally reliable kind,” Han said.

Another use of the same DDMotion technology would remedy what is becoming a growing problem for wind and solar generators: the lack of rotating inertia. Inertia is essential for utility operators to fix sudden changes in frequency caused by changes in generation or consumption (50 cycles in Europe and 60 cycles in the United States).

Lack of inertia has been blamed for the widespread blackout on the Iberian Peninsula and is becoming an issue for utilities with a lot of solar and wind generation, so called inverter power. This refers to the grooming with an inverter to power to grid-quality alternating current from its original direct current.

Here, again, his technology can inexpensively resolve the inertia problem for wind and solar generation, Han said. Either using a mechanical system or an electronic one, wind and solar systems could provide rotating inertia.

Increasingly, utilities are looking for untapped sources of power which can be bundled together into VPPs.

Renew Home, a Google-financed company, claims 3 gigawatts of electricity savings, which it says makes it the leader in VPPs. It relies on managing end-use load primarily in homes with load shedding of high energy-consuming devices during peaks. This is accomplished by using special thermostats and smart meters.

Industry experts believe artificial intelligence will be a key to extracting the most energy out of unconventional sources as well as fine tuning usage.

VPPs are here and many more are coming.