Photo credit wonderferret
The electricity grid may not need “baseload” generation sources like coal and nuclear to backup the variability of supply from renewables.
Jon Wellinghof is the Chairman of the US Federal Energy Regulatory Commission (FERC). FERC is an independent agency that amongst other things, regulates the interstate transmission of electricity, natural gas, and oil – for more on FERC’s responsibilities see their About page. Chairman Wellinghoff has been involved in the energy industry for 30 years and appointed to the FERC as a commissioner by then president Bush in 2006.
Last year, shortly after being appointed as Chairman of the FERC, Mr Wellinghoff announced that:
No new nuclear or coal plants may ever be needed in the United States….
Wellinghoff said renewables like wind, solar and biomass will provide enough energy to meet baseload capacity and future energy demands. Nuclear and coal plants are too expensive, he added.
“I think baseload capacity is going to become an anachronism,” he said. “Baseload capacity really used to only mean in an economic dispatch, which you dispatch first, what would be the cheapest thing to do. Well, ultimately wind’s going to be the cheapest thing to do, so you’ll dispatch that first.”…
“What you have to do, is you have to be able to shape it,” he added. “And if you can shape wind and you can effectively get capacity available for you for all your loads.
“So if you can shape your renewables, you don’t need fossil fuel or nuclear plants to run all the time. And, in fact, most plants running all the time in your system are an impediment because they’re very inflexible. You can’t ramp up and ramp down a nuclear plant. And if you have instead the ability to ramp up and ramp down loads in ways that can shape the entire system, then the old concept of baseload becomes an anachronism.”
This was quite an unusual contention at the time (and still is) and despite the Chairman’s many years working in the sector it was, by and large, ignored – even by the administration who had appointed him to the Chairmanship. In fact, the Obama administration has since announced financial backing for new nuclear power plants.
However, a study published last week by the Maryland-based Institute for Energy and Environmental Research backs Chairman Wellinghoff’s assertion. In a study of North Carolina’s electricity needs it concluded backup generation requirements would be modest for a system based largely on solar and wind power, combined with efficiency, hydroelectric power, and other renewable sources like landfill gas:
“Even though the wind does not blow nor the sun shine all the time, careful management, readily available storage and other renewable sources, can produce nearly all the electricity North Carolinians consume,” explained Dr. John Blackburn, the study’s author. Dr. Blackburn is Professor Emeritus of Economics and former Chancellor at Duke University.
“Critics of renewable power point out that solar and wind sources are intermittent,” Dr. Blackburn continued. “The truth is that solar and wind are complementary in North Carolina. Wind speeds are usually higher at night than in the daytime. They also blow faster in winter than summer. Solar generation, on the other hand, takes place in the daytime. Sunlight is only half as strong in winter as in summertime. Drawing wind power from different areas — the coast, mountains, the sounds or the ocean — reduces variations in generation. Using wind and solar in tandem is even more reliable. Together, they can generate three-fourths of the state’s electricity. When hydroelectric and other renewable sources are added, the gap to be filled is surprisingly small. Only six percent of North Carolina’s electricity would have to come from conventional power plants or from other systems.”
With larger and more inter-connected electricity grids, the requirement for baseload falls even further because the greater the geographical spread of your grid, the greater the chances that the wind will be blowing or the sun shining in some parts of it.
So, is there really any need for baseload power any more, or is this now just a myth perpetuated by those with vested interests?
Be careful, because “enough energy” isn’t the only thing that the grid needs. Also needs to guarantee the grid frecuency or provide enough reactive power. These two aspects are well resolved by base-load installations like nuclear or coal (also combined cycle and big hydro)
It can be done (big hydro, appropriate storage, …) but if you don’t take it into account, the grid would be unstable too many times and a black-out could happen.
Tom Raftery says
@indarki – sure, but a decent demand response program would have no problem managing this
I think it’s not only a matter of a demand response program, but also the type of generation technology.
For example, in case of grid fail (even if very punctual) many wind generators are program to be disconected because they aren’t able to help the grid, only to “follow” it. So, the problem can be amplified. Something similar happens with PV generators. They can contribute to energy mix in a important way if everything is fine but hardly can contribute to grid stability in case of fail… not because of grid control but its type of generation technology. Because of things like this is why the interconexión between France and Spain is planed in DC instead of AC, for example.
If utilities doesn’t take this into account, the grid can have a lot of problems. I think that this is one of the reasons why many distributed generation is rising so slowly.