A team at the US Department of Energy’s Oak Ridge National Laboratory has developed a utility-scale solar and storage project that can provide power to both AC and DC high-voltage lines, and thus shore up grid stability – here’s how it works.
Most of the US power grid uses alternating current, or AC, which constantly switches the direction of electron flow. But solar and battery storage uses direct current, or DC, that flows in a single direction.
The US power grid includes a smaller number of high-voltage DC lines that are more efficient at delivering bulk power over long distances or to remote regions.
Converting current between DC and AC requires specialized power electronics. So the researchers at Oak Ridge National Laboratory have developed a solar and storage plant that can provide power to both AC and DC high-voltage lines. As a result, renewable power can be more easily and reliably transmitted.
The project is called MARS, or “multi-port autonomous reconfigurable solar power plant.” It’s an all-in-one package that includes power electronics, electrical architecture, and cybersecurity software. And because it’s plug-and-play, it’s easier and cheaper for utilities to get it online.
Case simulations in hardware that were based on two California sites revealed that MARS achieved up to 50% reduction in power loss, a 16% improvement in stabilizing AC voltage frequency, and 100% detection of cyber intrusions.
MARS can also reconfigure itself based on available energy. For example, when the solar panels weren’t generating electricity at night, MARS could continue to connect the AC and DC transmission systems and use stored battery power to supplement its operation.
The researchers found that MARS reduced electrical costs by up to 40%, as they developed an algorithm to fine-tune plant size and energy storage to maximize annual revenue.
MARS also includes an innovative type of inverter that can maintain grid stability and jumpstart the grid after a disturbance.
Team lead Suman Debnath team explained:
You do not want the power grid to have significant losses of power when disturbances happen.
Traditional renewable plants may disconnect from the grid or stop sending power, but we did not see that happen with MARS. It could cope better with failures in the external grid and continue to operate, supporting the broader power system.
Oak Ridge National Laboratory is working with such industry partners as Southern California Edison, Opal-RT, Hitachi Energy, and the Georgia Institute of Technology. The Oak Ridge team and its partners are working together to roll out an initial field demonstration of either MARS components that support grid stability, or a scaled-down version of the full design.
Southern California Edison’s senior engineer for grid technology innovation, Md Arifujjaman, said:
From the point of view of a good algorithm to track down cybersecurity problems and technology we can use on the DC side, MARS is very helpful.
The DC technology is also promising for scaling down DC voltage for electric vehicle charging stations.
Photo: Existing and potential high-voltage direct current lines in states with the greatest solar potential, and prospective sites for MARS/Oak Ride National Laboratories
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Tesla and Rivian have been embroiled in a lawsuit in which the former accused the latter of having stolen battery technology by poaching Tesla employees.
It sounds like the two automakers are finally about to settle the lawsuit, which has been going on for 4 years.
When Tesla filed the lawsuit, it wasn’t clear what trade secrets Tesla was claiming Rivian had stolen. However, we noted that the employees listed in the lawsuits were two recruiters, an EHS manager, and a manager of Tesla’s charging networks.
The automaker claimed that these employees brought “documents consisting of highly sensitive trade secret, confidential, and proprietary engineering information” when they went to work for Rivian.
Over a year later, we now learn that Tesla had notified the court that it expects to file to get the lawsuit dismissed after reaching a conditional agreement with Rivian. The company didn’t disclose the details of the settlement (via Bloomberg):
Tesla didn’t disclose specifics about the agreement in a court filing, but told a California state judge that it expects to seek dismissal of the case by Dec. 24 upon satisfactory completion of the terms.
Neither Tesla nor Rivian have commented on the reported settlement.
While Tesla has claimed that it somewhat open-sourced its patents, we have previously noted that it’s not exactly the case. Tesla claims to let other companies use its patented technology as long as they themselves don’t sue them over patent rights.
And in this specific case, Tesla alleges that Rivian has specifically hired employees to steal technologies. Again, Rivian has denied the allegation.
Electrek’s Take
The terms are unknown, but in similar cases, it often involves things like some level of access to make sure that no proprietary technology is being used or has been used.
The lawsuit is not exactly clear, but based on the timeline and the allegations of “next-gen batteries”, Tesla could have been talking about its 4680 battery cells, although those are cells. It could also be the structural battery pack.
French infrastructure specialists Proviridis have partnered with EVSE manufacturer Kempower to deliver a novel, underground charging solution for electric semi trucks designed to easily integrate into existing truck depots.
By installing its high-powered charging cabinets underground and integrating the charging cables into a solid metal pipe, Kempower and Proviridis have been able to make room for high-powered charging points in an existing truck depot that didn’t have enough space to install either conventional EVSE or overhead “drop lines.”
For the pilot, the metal pipe is painted in a striking yellow color to make it easier to see while maneuvering the lot, and keeping the dispensers themselves more protected than conventional concrete bollards. The 600 kW power cabinet is positioned a few yards away – a typical space-saving Kempower solution – and connected to the charge points by underground cable.
Proviridis believes their solution provides enough of a competitive advantage that fleet buyers looking to electrify will be eager to give it a try.
“The product is durable across a wide spectrum of temperatures and conditions, requires minimal ventilation, and can cater for a wide range of customer needs,” explains Olivier Verdu, Technical Director at Proviridis. “These are features which perfectly place the Kempower solution for this type of charging configuration in a logistics environment.”
In honor of Black Friday and Cyber Monday, eBike specialist Buzz Bicycles is offering an exclusive discount for Electrek readers on its Centris Class 2 Folding Bike.
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Buzz Bicycles is back with an exclusive new deal
Buzz Bicycles has been a mainstay on Electrek for a few years now, as we have covered several of its electric bikes, which suit riders of all skill levels and help them “Buzz through life.” Buzz is an omnichannel eBike brand that prioritizes direct-to-consumerism and has found success in its mission to deliver ultimate transportation solutions at an excellent value for its growing base of eBike enthusiasts.
The company strives to deliver riders a “Wow moment,” which is usually brought on as they feel the pedal assist function kick in. This feature delivers all you need to conquer hills and longer rides while enjoying new adventures with friends.
The Buzz team has utilized decades of industry experience into its portfolio of eBikes, all conceived and designed in Dayton, Ohio. The company, which operates under the United Wheels umbrella alongside brands like Huffy Bicycles, Niner Bikes, and Batch Bicycles, has adopted an ethos that the freedom of riding should be fun and accessible for everyone, no matter what adventure lies ahead.
By leveraging the global presence of its parent company, Buzz Bicycles can make good on its promise to deliver affordable eBikes that are comfortable, powerful, and safe, much like the Centris Folding eBike, which is as versatile and compact as it is fun. The exclusive deal Buzz Bicycles is offering on the Centris makes it even more fun. You can take advantage of it below.
But first, you’ll want to learn about the capabilities of this foldable eBike to truly understand its value, as well as what accessories are available to level up your purchase.
The Buzz Centris is an easy to ride foldable eBike for all
The Buzz Centris is a Class 2 Folding eBike built for comfort and convenience no matter where you take it. At full size, the Centris’ step-through frame offers a low step-over height of just 16 inches, perfect for riders of all sizes, enabling easy transitions from ground to saddle for its riders.
When you’re not riding, the Centris from Buzz Bicycles folds neatly to 34 inches in length and 22 inches in height, making it easy to store at home or to carry in a vehicle on the way to your next ride. Furthermore, the assembled bike only weighs 68 pounds, making it easy to transport.
You can easily navigate tougher terrain on the Centris thanks to the eBike’s 20″ x 4″ knobby tires and front suspension. The bike is powered by a 48V, 500-watt-hour (Wh) battery pack that can propel it to a top speed of 20 mph for an all-electric range of up to 40 miles on a single charge.
Additionally, this folding model from Buzz Bicycles comes equipped with both a front and rear rack, offering versatile cargo-carrying options so you can customize your ride with a variety of Buzz accessories.
Like all Buzz eBikes, the Centris is tested and deemed compliant with the UL2849 standard. This standard covers the entire electric bicycle system, including the motor, battery, controller, and charger, offering the highest safety standards for added peace of mind.
The Centris Class 2 folding bike from Buzz is available in two colors: Gloss White or Matte Black. This $1,199 eBike is currently reduced to $899 – and you can score an additional $200 off with this exclusive promo, but only for a limited time.
With the purchase of any Buzz eBike, including the Centris, you are guaranteed the following:
10-year limited warranty (lightweight aluminum frame protected for full 10 years)
2-year limited warranty (electrical components covered by 2-year warranty for peace of mind)
6-month limited warranty (additional bike components protected by a 6-month warranty)
Are you interested in the Centris from Buzz Bicycles? You’ve come to the right place. Starting today, while supplies last, you can take advantage of an additional $200 off the sale price by using promo code “ELECTREK200.“ That’s a $500 discount in total!
We highly recommend perusing Buzz’s entire lineup of products. They are designed for commuters and casual riders, with technology and features that help you quickly feel comfortable riding. If you are new to the world of E-transportation, Buzz Bicycles is the brand for you.
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