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Green Energy >> Solar vs Power Company ALL OF USA >> Storage - SunEdison Signs Large-Scale Energy Storage Contract With Ontario ISO
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Message started by electron on Dec 16th, 2015 at 12:31am

Title: Storage - SunEdison Signs Large-Scale Energy Storage Contract With Ontario ISO
Post by electron on Dec 16th, 2015 at 12:31am
For a "Power Company" to become a Energy Management Company, they will need technology to store excess solar power for later use.

This may be a good technology for that.

"The project, which will use Imergy’s vanadium redox flow battery technology, is SunEdison's first commercial large-SunEdison has signed a 10-year agreement with Ontario's Independent Electricity System Operator (IESO) to supply 5 MW/20 MWh of energy storage to the province. SunEdison said that the IESO intends to use data from the energy storage project to analyze how storage can be used to smooth the power flow from wind and solar, defer expensive system upgrades, and ultimately shape the future of its grid. The project, which will use Imergy’s vanadium redox flow battery technology, is SunEdison's first commercial large-scale, grid-connected energy storage project, and is one of the first commercial applications of flow batteries in Canada.scale, grid-connected energy storage project, and is one of the first commercial applications of flow batteries in Canada."

http://www.seia.org/news/sunedison-signs-large-scale-energy-storage-contract-ontario-iso

Vanadium redox battery:
https://en.wikipedia.org/wiki/Vanadium_redox_battery

"Other useful properties of vanadium flow batteries are their very fast response to changing loads and their extremely large overload capacities. Studies by the University of New South Wales have shown that they can achieve a response time of under half a millisecond for a 100 % load change, and allowed overloads of as much as 400 % for 10 seconds. The response time is mostly limited by the electrical equipment. "

"Vanadium flow batteries are extremely stable — leaving the battery in a discharged state causes no damage, and the battery has an estimated lifespan of 30-50 years and supports thousands to tens of thousands of discharge cycles — far more than lithium-ion can manage. The disadvantage of flow batteries is that the total energy density of the solution is rather low energy density and the complexity of the storage and pumping mechanisms. Research into improving vanadium’s energy density is underway, a team at the Pacific Northwest National Laboratory has found a way to boost the energy density of vanadium batteries by up to 70% by switching to a different electrolyte formulation."

http://www.extremetech.com/electronics/199440-new-vanadium-flow-battery-delivers-250kw-of-liquid-energy-storage

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