I attempted to add it to my current game and I have Krastorio2 installed. K2 does add a new substation.

Error loading mods:
Failed to load mods: Error while running setup for entity prototype "substation" (electric-pole): next_upgrade target (kr-substation-mk2) must have the same fast_replaceable_group (substation != substation-electric-pole).
Mods to be disabled:
Krastorio2 (1.3.24)
underground-energy-distribution (1.10.0)
extended-descriptions (1.2.3)

In looking at the code, I noticed this:

large_db.minable                        = {mining_time = 0.5, result = "ued-long-distance-db"}

Guessing the result should be ued-large-db.

Yep, i'll update that now lmao

Mod updated. lemme know if it's still giving you trouble.

Seems the error you found is unrelated with K2 compatibility. Thanks for the bug report though. That was a problem.
As for K2 compatibility, i'm going to have to do some digging into their code and see why the conflict exists. Might be able to drop the fast replacement groups and still have it work.

Working for me now, thanks! And thanks for updating the looks of these things... much improved!

Edit: You might like my Fish Pole mod... same concept, but for water.

I'll check it out!
Some further graphical improvements are coming soon. I'm doing some shadow corrections and fancier dirt/rust maps.

Love this mod. Thanks

You're welcome!