The Wireless Redstone mod adds a transmitter and receiver for redstone connections. This a great way to vastly increase the distance your redstone can go without laying long lines of redstone dust.
You simply need to set up a trasmitter and provide a power source to it. Then place a receiver wherever you need that power connected. It seems as though there’s no distance too far for reception either. So you can essentially set up a complicated redstone gate deep underground and then add a receiver wherever you need power.
Even better with this mod is the ability to receive signal to multiple sources so you don’t need to lay additional transmitters.
You will need an additional API found here.