[HankB99]

Modern electrical generation, transmission and distribution systems are protected by "relays" that open breakers to prevent damage. I did a quick search on "Carrington event protective relaying" and found https://www.pes-psrc.org/kb/report/115.pdf. It seems that what is needed is to properly configure the protective relaying for the possibility of a geomagnetic storm and to make sure that all relaying is operational and modern enough to do so. Anything new or upgraded should meet these criteria. Older stuff probably needs to be reviewed.