Very simple mod - increases the range of the Big Electric Pole from 30 to 32, so that they can be chunk-aligned. There are many like it, but this one is mine. Specifically because this one is as concise and simple as possible - just one line of code.

Free download link at GistHub.

Also, please see Rseding91's reasoning behind maximum_wire_distance. It makes the game lag more when placing large power poles. This mod exists to give the option to the player. Anyways, Factorio seems so optimized thanks to the hard working devevelopers that if you're playing other AAA game titles on your rig, it should handle 32 tile long power poles easily. Probably even much longer poles too!