Here is a little bit of unsolicited advice from one who has been at the bottom here more than once.....Powerlines are the biggest pain in the butt for all photographers.....they are considered a distraction in a photograph and if you only have basic editing, you can't take them out! So, by knowing they are the bane of all photographer's existance, a shot of just the powerlines just doesn't appeal to the majority, especially on a site like this where the folks are ultra-critical.
Just my 2 cents, for what it's worth and I'm just trying to help. :-)
Welcome to DPC! One thing you shold always do is make sure you use the full size available to you when submitting a picture. People will generally score quite low for smaller shots.