The Power Transmission Grid

The National Power Grid Company Transelectrica SA is transmitting the electricity by means of the power transmission grid (PTG), consisting of electric substations and lines. The PTG is the electricity network of national and strategic interest, with nominal voltage higher than 110 kV.
The amount of installations managed by Transelectrica SA consists of:

81 electric substations, of which:	8759.4 km overhead electric lines (OHL), of which:	216 main transformer units amounting to 37,794 MVA, as follows:
·     1 statie 750 kV	·     154.6 km 750 kV	·   2 x 1250 MVA
·   38 statii 400 kV	·   4703.7 km 400 kV	·   2 x 500 MVA
·   42 statii 220 kV	·   4035.2 km 220 kV	·   22 x 400 MVA
	·   of which interconnection lines: 425.8 km	·   29 x 250 MVA
		·   81 x 200 MVA
		·   1 x 100 MVA
		·   2 x 63 MVA
		·   7 x 40 MVA
		·   26 x 25 MVA
		·   1 x 20 MVA
		·   33 x 16 MVA
		·   10 x 10 MVA
		·   2 x 5.6 MVA