How big is Taiwan's transmission network?

OverWatts maps 2,052 km of transmission line in Taiwan, across 221 segments, plus 28 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 Taiwan's grid?

Most of the mapped network is high voltage (220–379 kV): 2,052 km of 2,052 km. The highest voltage tagged anywhere in the country is 690 kV.

How complete is the grid map for Taiwan?

Strong — 59.6 km of mapped line per 1,000 km² of land, ahead of 93% 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.

Taiwan · electricity network

Taiwan power grid

OverWatts maps 2,052 km of Taiwan's electricity transmission network across 221 line segments and 28 substations, the 89th most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 2,052 km — 100% of the mapped length, with the highest tagged voltage at 690 kV. That works out to 59.6 km per 1,000 km² of land — strong OpenStreetMap coverage, ahead of 93% of mapped countries.

Open the grid lens →Taiwan profile →

2,052 km

Mapped transmission line

Substations

#89

of 153 mapped grids

690 kV

Highest voltage

OpenStreetMap coverage

Strong59.6 km / 1,000 km²ahead of 93% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Taiwan'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. 0% of segments carry a real line name and 0% an operator tag.

Mapped line length by voltage

220–379 kV2,052 km 100%

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

On the interactive map

Open the interactive map →

Load against the network

47.4 GW

Operating generation

Data centres mapped

km of line per substation

59.6

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.

How Taiwan compares · mapped grid by country

1. People's Republic of China624,300 km
87. Croatia2,078 km
88. Senegal2,061 km
89. Taiwan2,052 km
90. Afghanistan1,940 km
91. Ireland1,923 km

Frequently asked

How big is Taiwan's transmission network?: OverWatts maps 2,052 km of transmission line in Taiwan, across 221 segments, plus 28 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 Taiwan's grid?: Most of the mapped network is high voltage (220–379 kV): 2,052 km of 2,052 km. The highest voltage tagged anywhere in the country is 690 kV.
How complete is the grid map for Taiwan?: Strong — 59.6 km of mapped line per 1,000 km² of land, ahead of 93% 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.

Elsewhere in Taiwan

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.