Conn. Gen. Stat. § 16a-7b

No municipality other than a municipality operating a plant pursuant to chapter 101 or any special act and acting for purposes thereto may take an action to condemn, in whole or in part, or restrict the operation of any existing and currently operating energy facility, if such facility is first determined by the Public Utilities Regulatory Authority, following a contested case proceeding, held in accordance with the provisions of chapter 54, to comprise a critical, unique and unmovable component of the state's energy infrastructure, unless the municipality first receives written approval from the Commissioner of Energy and Environmental Protection and the Connecticut Siting Council that such taking would not have a detrimental impact on the state's or region's ability to provide a particular energy resource to its citizens.