Iran clearly sees an opportunity to ease its sanctions at least a little, and since they have very cheap electricity, they use exactly what Bitcoin allows - the right of everyone to use it anywhere in the world, without asking for someone's opinion or permission. If the memory serves me well, I read that about 30 Iranian companies use Bitcoin in their business, and I'm glad about that - although those who imposed sanctions will not agree with that, but that is their problem.
I don't get this, power plants are owned and operated by the state there(?), (not like in some countries where it's done by private companies). So they need to grant the licence to themselves, it doesn't make sense to me.
I understand this in a way that power plants are owned by the state that leases part of their capacity to private investors. The article states that the largest Turkish miner is also has or has had a license in Iran, which leads me to the conclusion that they are still looking for private investors.
Not only they(state) lease some parts to private investors, but there are many plants that are owned by private sector already. I think it's happening according to some plan conceived years ago:
For years it has been the country's position to privatise 80% of all power plants.
And here's the most recent info in this regard:
Head of Iran's Power Generation, Transmission and Distribution Management Company, known as Tavanir, says 60 percent of the country’s power generation capacity has been created by the private sector funding and more investment is being made in this sector.
Contrary to popular belief, private sector is huge in Iran. It's not like in the former Soviet Union where absolutely every plant, with no exceptions, was solely owned by the state.