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Grid Forming vs Grid Following Battery Systems

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NIKUNJ PATEL's picture
Senior Electrical Engineer SA Power Networks

Experienced Electrical Engineer & Design Manager with a demonstrated history of working in the utilities & consultancy industry. Skilled in Electric Utility, Computer-Aided Design (CAD)...

  • Member since 2021
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  • Sep 20, 2021
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AGL to build the world’s biggest “grid forming” battery at Torrens Island, South Australia. The most significant part of this battery is that after an initial stage operating in “grid following mode”, the Torrens Island battery will also include technology that will enable it to operate in “grid forming” mode, making it the largest of its type in the world. The use of “grid forming” inverters are considered crucial in the transition from conventional “baseload” and “synchronous” generation. 

See attached clipping from AEMO's Aug 2021 White paper for comparison between technologies.

Here is link of White paper - AEMO'S White paper

#southaustralia #Gridformingbattery #renewableenergy #energystorage

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Matt Chester's picture
Matt Chester on Sep 20, 2021

If this is to be the largest one int he world-- what's the increase in size from the largest one before it? How common are the grid forming batteries elsewhere in the world? 

Jim Stack's picture
Jim Stack on Sep 20, 2021

GRID forming sounds like a very stablE way to run the GRID. 

Quote= Grid-forming inverters with a firm energy source behind them may be able to replace many of the capabilities historically provided by synchronous generators. Initially, AEMO recommends prioritising deployment of grid- forming capabilities on grid-scale battery energy storage systems (BESS) as this technology provides capability to deliver firm, flexible energy behind the inverter. While large, standalone BESS provide one way to deliver grid-forming capability, smaller batteries (with storage capability of several minutes) coupled to variable renewable energy (VRE) plant might also provide a flexible 

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