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Top Page > Transmission & Distribution > Product/Technical Services > HVDC enables long distance transmission and interconnection of asyncrous grids

HVDC enables long distance transmission and interconnection of asyncrous grids

  • HVDC that enable power supply across regions HVDC that enable power supply across regions
    HVDC that enable power supply across regions
  • Connects a distance of approx. 415 km, sends the power of 1 GW, and the direct current voltage is as much as 500 kV
  • Frequency conversion (FC) system for frequency adjustment
    Frequency conversion (FC) system for frequency adjustment
  • Toshiba will keep responding to the needs of power interchange through its technologies to deliver electricity across countries and regions
    Toshiba will keep responding to the needs of power interchange through its technologies to deliver electricity across countries and regions

Toshiba has been developing HVDC system since 1950s, installing HVDC systems, FC (Frequency Converter) systems and SVCs (Static Var Compensater) which comtribute to the relaiability of the power tansmission/distribution systems.

"HVDC system" for improving the power transmission efficiency and enhancing the interconnection of asyncronous grids

Toshiba has contributed to all HVDC projects in Japan and been the No.1 supplier.

VSC (Voltage Sourced Converter) with state-of-the-art MMC*1 technology

Toshiba is the pioneer of VSC with MMC in Japan, which realizes compact system and your flexible grid operation.

*1 MMC: Modular Multilevel Converter

Self-excited converter valve Self-excited converter valve
Self-excited converter valve adapting the MMC method

This technology is applied for the new Hokkaido-Honshu HVDC link project in Japan. (300MW, DC 250kV, DC 1200A)

New Hokkaido-Honshu HVDC Link
New Hokkaido-Honshu HVDC Link

LCC (Line-Commutated Converter) for long-distance large-capacity transmission

Toshiba has many references of LCCs for large HVDC system in domestic and overseas projects including unique interconnection between different frequency grids (50Hz-60Hz), which contribute to secure power supply.

Suspended thyristor valve Suspended thyristor valve
Suspended thyristor valve

Toshiba developed suspended-valves for MONITA HVDC (DC±500kV) for Terna S.p.A. to interconnect Montenegrin grid to Italian grid.(under construction)

Italy-Montenegro HVDC project
Italy-Montenegro HVDC project

Power electronics system for various application

BTB (Back-to-back) for asynchronous interconnection

BTB HVDC system enables:

  • interconnection of asynchronous grids without any system interferences;
  • high-speed tie-line power control; and,
  • no increase of short circuit current.

It realizes power interconnection between grids where AC interconnection is difficult.

[Applied facilities]

  • Minami-Fukumitsu BTB (since 1993)

Minami-Fukumitsu BTB Minami-Fukumitsu BTB
Minami-Fukumitsu BTB

SVC (Static Var Compensator) to support network voltage

Toshiba has many SVC references that are effective to suppress voltage fluctuations and to improve the voltage stability, both in Japan and overseas.
Our SVC also contributes to keep the grid voltage level against output from renewable energy sources which could be unstable by weather conditions.

Static VAR compensator for power systems Static VAR compensator for power systems
Static VAR compensator (SVC)

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