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Power conditions

About the Power Supply

Hokkaido’s total power generation capacity is over 5,000,000kW (5GW or 5,000MW) during normal times

The power transmission grid of Hokkaido Electric Power Network is made up of 275kV transmission lines arranged in a large ring. Called the Do-o Main Line, it encircles the Sapporo area, connecting the main power plants within it.
Asahikawa, Obihiro, Kushiro, and Hakodate are connected by either 275kV or 187kV transmission lines. Hakodate is directly connected to the mainland by direct current power transmission via the Hokkaido-Honshu Link (600,000kW or 600MW) and New Hokkaido-Honshu Link (300,000kW or 300MW).

The Hokkaido Electric Power Network Group and other power generation companies have a total power generation capacity of over 5,000,000kW (5GW or 5,000MW) during normal times, up to just under 20% of which can be supplied to the mainland.
In cases where the power supply within Hokkaido becomes tight, electricity can be supplied from the mainland.

System diagram at Hokkaido Electric Power Company
Source: Ministry of Economy, Trade and Industry “History of equipment formation at Hokkaido Electric Power” (2018)

66kV Transformer Substation

List of Transformer Substations in Regions Which Have Been Inquired About by Data Center Operators

Most data centers use 66kV special high-voltage electricity. We can offer information such as which transformer substations can provide this, how they ensure redundancy, and so on.

  Substation name Operational capacity value (MW)
札幌市 西札幌 (石狩湾新港方面) 391
篠路 200
苗穂 393
南九条 299
南札幌 389
江別市 北江別 197
滝川市 (美唄方面) 西滝川 150
北広島市・恵庭市 恵庭 150
苫小牧市 苫小牧 199
苫小牧市 東苫小牧 100
安平町 (苫東方面) 南早来 200
合計   2,668
(Reference): Hokkaido Electric Power Network System Free Capacity List
https://www.hepco.co.jp/network/renewable_energy/fixedprice_purchase/restrictions_map.html

Contact

  • Contact by Phone

    Hokkaido Economic Affairs Bureau Industrial Promotion Division Location Promotion Section

    011-204-5328

    (Japanese only)

  • Contact via Form