How big is Romania's transmission network?

OverWatts maps 7,845 km of transmission line in Romania, across 379 segments, plus 38 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.

What voltage is Romania's grid?

Most of the mapped network is extra-high voltage (380–764 kV): 4,432 km of 7,845 km. The highest voltage tagged anywhere in the country is 400 kV.

How complete is the grid map for Romania?

Moderate — 33 km of mapped line per 1,000 km² of land, ahead of 73% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.

Who operates the grid in Romania?

Transelectrica, TEL are tagged as operators on mapped segments. Operator tags are present on 3% of Romania's segments, so this ranks who is *recorded*, not market share.

What interconnectors connect Romania to its neighbours?

4,040 MW of cross-border transfer capacity to Moldova, Hungary, Bulgaria, Serbia, Ukraine, plus 5,461 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).

Romania · electricity network

Romania power grid

OverWatts maps 7,845 km of Romania's electricity transmission network across 379 line segments and 38 substations, the 38th most-mapped grid of 153 countries. Its backbone is extra-high voltage (380–764 kV), carrying 4,432 km — 56% of the mapped length, with the highest tagged voltage at 400 kV. That works out to 33 km per 1,000 km² of land — moderate OpenStreetMap coverage, ahead of 73% of mapped countries. It is connected to 5 neighbouring grids by 4,040 MW of existing cross-border transfer capacity, with a further 5,461 MW planned.

Open the grid lens →Romania profile →

7,845 km

Mapped transmission line

Substations

#38

of 153 mapped grids

4.0 GW

cross-border · 5 neighbours

400 kV

Highest voltage

OpenStreetMap coverage

Moderate33 km / 1,000 km²ahead of 73% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Romania's network — not how much network exists. Large, sparsely-populated countries score low for geographic reasons alone, and every kilometre here is mapped length, so the totals are a floor rather than an operator-reported figure. 12% of segments carry a real line name and 3% an operator tag.

Mapped line length by voltage

380–764 kV4,432 km 56%
220–379 kV3,414 km 44%

379 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.

4.0 GW existing · 5.5 GW planned · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023

On the interactive map

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Load against the network

15.7 GW

Operating generation

206

km of line per substation

km per 1,000 km²

Where there is room to connect a new load depends on published hosting capacity, which most operators release only as their own map. OverWatts does not yet ingest those feeds, so these are the density measures the open data supports — generation and mapped demand against mapped network — not a headroom figure.

Operators tagged on Romania's network

Transelectrica6 60%
TEL4 40%

Segment counts from OSM `operator` tags, merged across spellings. Present on 3% of segments — this ranks who is recorded, not market share.

How Romania compares · mapped grid by country

1. People's Republic of China624,300 km
36. United Kingdom9,612 km
37. Norway8,900 km
38. Romania7,845 km
39. Indonesia7,547 km
40. Syria7,365 km

Frequently asked

How big is Romania's transmission network?: OverWatts maps 7,845 km of transmission line in Romania, across 379 segments, plus 38 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.
What voltage is Romania's grid?: Most of the mapped network is extra-high voltage (380–764 kV): 4,432 km of 7,845 km. The highest voltage tagged anywhere in the country is 400 kV.
How complete is the grid map for Romania?: Moderate — 33 km of mapped line per 1,000 km² of land, ahead of 73% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.
Who operates the grid in Romania?: Transelectrica, TEL are tagged as operators on mapped segments. Operator tags are present on 3% of Romania's segments, so this ranks who is *recorded*, not market share.
What interconnectors connect Romania to its neighbours?: 4,040 MW of cross-border transfer capacity to Moldova, Hungary, Bulgaria, Serbia, Ukraine, plus 5,461 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).

Elsewhere in Romania

Transmission lines Substations Power plants Data centres

Network geometry: OpenStreetMap (ODbL) © OpenStreetMap contributors, ingested and measured by OverWatts · derived 2026-07-26. Counts every mapped line of 220 kV and above; the map layer draws the ≥380 kV backbone only, so it shows less than is measured here.