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Topic: Demand Flexibility

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[Episode #197] – Virtual Power Plants (VPPs)

May 3 2023

Full Episode

The time may have arrived for Virtual Power Plants (VPPs) to fully realize their potential. In a VPP, groups of distributed energy resources (DERs) like EVs, batteries, and heat pumps can be managed to consume power when it is inexpensive, avoid consuming power when it is expensive, and even provide power back to the grid when supplies are limited.

While VPPs have been around for many years, operating commercially in places like Australia, the US power grid has not seen wide-scale integration. This is now changing because VPPs can help the grid do more with less - supporting new loads without requiring expensive new investments in grid expansion.

In this episode, Jigar Shah, Director of the Loan Programs Office at the US Department of Energy, joins us to share his vision of a much-expanded role for VPPs on the power grid and why he thinks the sector is ready to scale up. You’ll hear how a handful of VPPs and programs to support them have been launched in the US. You’ll also hear how the US Department of Energy is exploring ways to accelerate the development and integration of VPPs, including making financing available through Jigar’s office to support the adoption of VPP-enabled DERs under the Title 17 Clean Energy Financing program.

And because Jigar is with the Department of Energy, sharing information that should be accessible to everyone, we decided to make this one of our occasional lagniappe shows and put it in front of the paywall so that premium and free listeners alike can enjoy it. Hey free listeners, now you can see what you’ve been missing!

Geek rating: 8

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[Episode #188] – Getting to a 100% Clean Grid

Dec 21 2022

Mini Episode

How much of a role might wind, solar, nuclear, transmission, power plants equipped with carbon capture and sequestration (CCS) technology, or direct air capture of CO2 play on a 100% clean power grid? Which mix of those technologies would provide the cheapest pathways to a clean grid?

And once we have met 90% of the need for grid power with clean generation, what will we need to meet the last 10% of the demand for grid power? Will it be ‘overbuilt’ wind and solar? Dispatchable geothermal, hydropower, and bioenergy generators? Seasonal storage using hydrogen or batteries? Conventional fossil-fueled plants with CO2 capture? Or might it be some mix of flexible demand technologies? Or some or all of the above?

For that matter, how certain can we even be about modeling the possible solutions years or even decades ahead? Are there solutions that might play a large role in the future but that we can’t yet model very well? How confident should we be that whatever the solutions turn out to be, we will end up with not only a grid that is completely free of carbon emissions but also one that is fully reliable?

In this episode, we speak with a senior researcher at the US National Renewable Energy Laboratory (NREL) who has been researching and modeling grid power for many years. In this quite technical discussion, we review two new NREL reports that address these questions and show that producing a 100% clean power grid is not only technically feasible by a variety of pathways but also commercially feasible and ultimately, cheaper than continuing to run the fossil-fueled power grid we have today.

Geek rating: 9

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[Episode #63] – Pathways to Deep Decarbonization

Feb 21 2018

Mini Episode

As energy transition proceeds we’ll need to move well beyond decarbonizing electricity generation and into transportation and space heating powered by renewables. But we’re only beginning to figure out the pathways by which we might do that, and since each region has its own particular sources of renewable energy and its own particular needs for energy, the solutions may vary quite a bit from place to place.

When do we figure out how to decarbonize space heating and transportation? What sorts of challenges will we face in adding those loads to the electricity grid? How much additional generation, transmission, distribution capacity, and storage will we need? How will we manage such a grid? And what if, once we have transferred some of those loads to the grid, it actually starts to look cheaper to not electrify everything? Our guest in this episode has studied such questions for years, and has some surprising insights into how deep decarbonization might actually evolve.

Geek rating: 3

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[Episode #60] – Demand Flexibility

Jan 10 2018

Mini Episode

Demand response and demand flexibility—shifting demand to intervals where electricity is abundant and cheap, and away from when the grid is constrained or power is expensive and dirty—can help keep prices down, optimize the grid overall, and help us integrate more renewable supply into grid power while displacing more fossil fuels. Until recently, this has mainly meant doing simple things like turning off loads during the on-peak intervals of time of use rates. But now new technologies are coming to the grid, including artificial intelligence, machine learning, and the so-called Internet of Things, which could let us moderate loads and operate grid assets in a much more intelligent, precise, and dynamic fashion, taking grid optimization to a new level and reducing the need for peaking resources.

But this is all quite new, and how we’re going to implement it, and what it may require, largely remains to be seen. In this episode we’ll talk with Sara Bell, founder of Tempus Energy, and get a little insight into how some early pilots of these technologies are working in the UK and South Australia. We’ll also get an inside view of her campaign to revise the design of the capacity market in the UK, so that it actually benefits consumers in accordance with the law, rather than distorting markets in favor of fossil fuel incumbents.

Geek rating: 8

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