Aug 1 (Reuters) - Fortescue Metals Group Ltd FMG.AX
* Refers to market release issued by Transalta Renewables on 28 July & various media reports relating to status of south Hedland power station
* notified Transalta that in its view South Hedland power station has not yet satisfied requisite performance criteria under co's contract
* Fortescue is continuing to purchase electricity from other generators to supply its operations in port Hedland