The most popular type of stars are red dwarves, which regrettably tend to be flare stars. Yes, I know that geomagnetic storms and power lines do not like each other.
Technology level: More or less early 21st century equivalent. Extra issues: No legacy issues, infrastructure and settlements are built from scratch. Low population density, so one theoretically could be picky. Cheapest and easiest to access source of electricity is hydropower.
How to design power grids and related infrastructure in the most practical and reasonable way?
Best answers will take in to consideration things such as:
Founding main settlements away from magnetic poles and away from main bodies of water (this second is also a risk factor on Earth for geomagnetic storms).
The decisive (or almost decisive) factor in locating the main city near the main power plant to shorten the cables
Special preferences concerning voltage or frequency of electric current for transmission lines (HVDC is out, if I'm not mistaken).
Practicality of hardening the grid (series capacitors / surge protectors / etc.), as opposed to a main line of defense of regularly (even a few times per day) turning off most of power transmission lines to prevent transformers from burning.
Trying to enforce construction codes to design buildings that would work as low quality Faraday cages
Any other key modification area that I've missed.
[Question only relates to geomagnetic storms, ignores issues of tidal lock or ultra high UV index during flares]