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Comment by Caveman_Coder | Hacker News Reader

> "...by requesting non critical loads to turn off or throttle themselves when the frequency drops too low."

I'm not sure about other utility companies, but when I was a TSO we never did this. For the most part, AGC worked fine to maintain frequency.

http://www.nerc.com/files/bal-005-0_2b.pdf

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Autonomous Demand Response for frequency regulation is real, and being pursued as a way to deal with the intermittency of renewables and the resulting impact on grid supply. Here are some references:

General Topic: http://www.pnnl.gov/main/publications/external/technical_rep... http://www.sciencedirect.com/science/article/pii/S0196890416...

HVAC Demand/Response: http://ieeexplore.ieee.org/document/7407597/?reload=true

Aluminum Smelter Demand Response: http://repository.cmu.edu/cgi/viewcontent.cgi?article=1836&c...

Thanks for the excellent references, the PNNL report was a very interesting read.

> "Autonomous Demand Response for frequency regulation is real..."

I wasn't saying that ADR wasn't "real," just that it's not something we're currently doing for frequency control in actual practice...and of course that might change as engineers continue researching and pushing the field further. It definitely looks like ADR solutions are on the horizon though.

Ya, sorry about implying that. FWIW, I didn't read your comment as a dismissal of ADR.

No worries. Excellent resources BTW, they made for a great weekend morning read.

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