This is the idea of introducing a complex bureaucratic layer in order to introduce elements of competition into the system. In principle it can work, but such a system was tried with British rail privatisation and resulted in lots of situations where the incentives for the private operators led to really bad service on key lines for many years.

Britain is a perverse example of staggering incompetence and corruption.

Argentina tried to do this, lost 20 years of maintenance and development.

And remember that you can loosely correlate price with energy usage. Bid at time of use would be energy hungry. I also have exemples of why consolidated actors coming into a new market is actually worse than a govt taking care of the market, and that's make bidding a poor way of privatizing networks.