Maybe this one is an interesting power grid map you don’t know till now:

http://www.flosm.de/en/powergrid.html?lat=49.4830700&lon=1.00992281&r=337.29041&st=0&sw=cabledistributioncabinet,powerbay,powerbusbar,powercable,powercompensator,powerconverter,powerline,powerline110k,powerline115k,powerline20k,powerline220k,powerline220v,powerline225k,powerline30k,powerline380k,powerline3k,powerline400k,powerline420k,powerline500v,powerline50k,powerline6k,powerline750k,powerline765k,powerlinedchigh,powerlinedclow,powerpole,powersubstation,powerswitch,powertower,transformer