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Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
Vietnam · electricity network
Vietnam power grid
OverWatts maps 18,900 km of Vietnam's electricity transmission network across 6,268 line segments and 34 substations, the 19th most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 9,915 km — 52% of the mapped length, with the highest tagged voltage at 500 kV. That works out to 56.2 km per 1,000 km² of land — strong OpenStreetMap coverage, ahead of 92% of mapped countries. It is connected to 3 neighbouring grids by 1,608 MW of existing cross-border transfer capacity, with a further 3,068 MW planned.
OpenStreetMap coverage
This grades how completely OpenStreetMap has drawn Vietnam'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. 14% of segments carry a real line name and 20% an operator tag.
Mapped line length by voltage
- 380–764 kV9,022 km 48%
- 220–379 kV9,915 km 52%
6,268 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.
Cross-border links from Vietnam
1.6 GW existing · 3.1 GW planned · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023
On the interactive map
Load against the network
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 Vietnam's network
- EVN1,276 100%
Segment counts from OSM `operator` tags, merged across spellings. Present on 20% of segments — this ranks who is recorded, not market share.
How Vietnam compares · mapped grid by country
- 1. People's Republic of China624,300 km
- 17. Ukraine19,200 km
- 18. Argentina19,100 km
- 19. Vietnam18,900 km
- 20. Japan18,800 km
- 21. Italy18,500 km
Frequently asked
- How big is Vietnam's transmission network?
- OverWatts maps 18,900 km of transmission line in Vietnam, across 6,268 segments, plus 34 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 Vietnam's grid?
- Most of the mapped network is high voltage (220–379 kV): 9,915 km of 18,900 km. The highest voltage tagged anywhere in the country is 500 kV.
- How complete is the grid map for Vietnam?
- Strong — 56.2 km of mapped line per 1,000 km² of land, ahead of 92% 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 Vietnam?
- EVN are tagged as operators on mapped segments. Operator tags are present on 20% of Vietnam's segments, so this ranks who is *recorded*, not market share.
- What interconnectors connect Vietnam to its neighbours?
- 1,608 MW of cross-border transfer capacity to China, Laos, Cambodia, plus 3,068 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).
Elsewhere in Vietnam
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.