Comments on: Earthjustice challenges MISO rule that restricts renewable ancillary services https://www.solarpowerworldonline.com/2023/02/earthjustice-challenges-miso-rule-renewable-ancillary-services/ Covering the world of solar power technology, development and installation. Thu, 02 Feb 2023 05:03:00 +0000 hourly 1 https://wordpress.org/?v=6.2 By: Solarman https://www.solarpowerworldonline.com/2023/02/earthjustice-challenges-miso-rule-renewable-ancillary-services/#comment-139359 Thu, 02 Feb 2023 05:03:00 +0000 https://www.solarpowerworldonline.com/?p=101169#comment-139359 “Wind, solar and battery hybrid resources have proven they can provide ancillary services. The temporary prohibition was instituted in 2011 by MISO and never revisited, the complaint seeks to lift this blanket prohibition.”

It has also been pundited, MISO should be dissolved into local or regional CCAs and interconnect regions to allow shuttling energy from wind and solar PV resources to the Northeastern U.S. particularly in the winter months. The east coast would probably fare better by constructing very large regional redox flow batteries or use something like iron/air flow batteries that can be designed for (days) of energy storage. Form Energy could replace many natural gas and even coal fired plants as standby reserve with something like 100 hours of stored energy that can be dispatched and replenished from wind and solar PV or even run nuclear plants at the most efficient generation level and store any overgeneration for later dispatch. Mechanical energy storage like the hydrostor concept can take overgeneration and store it as highly compressed liquid air to use later in the year. This type of (A-CAES) technology would do well by becoming a serial output of nuclear plants year around with incremental overgeneration stored for months to offset seasonal generation and grid load needs for days and possibly for (months) if designed ‘big enough’. Which begs the question, just how large of a facility would a hydrostor ESS be to contain some 100GWh to 1TWh of energy storage? The paradigm is no longer “burning fuel” and “standby” reserve, but to grab overgeneration and time shift for later dispatch. The concept of storing energy long term and then using in place transmission infrastructure to “shuttle” energy from one wholesale energy resource to another wholesale energy resource would be the way to set up the “day ahead” energy market.

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