Abstract ▼ AI-Helper

The HVDC(High Voltage Direct Current) light is an electric power transmission technology for small and medium size transmissions. The HVDC technology is used to transmit electricity over long distances by overhead transmission lines or submarine cables. This technology is well suited for connection ...

The HVDC(High Voltage Direct Current) light is an electric power transmission technology for small and medium size transmissions. The HVDC technology is used to transmit electricity over long distances by overhead transmission lines or submarine cables. This technology is well suited for connection of networks that otherwise are difficult or impossible to interconnect. It is also used to interconnect separate power systems, where traditional alternating current connections can not be used. In a high voltage direct current system, electric power is taken from one point in a three-phase AC network, converted to DC in a converter station, transmitted to the receiving point by an overhead line or cable and converted back to AC in another converter station and injected into the receiving AC network. Typically, an HVDC transmission has a rated power of more than 100MW and many are in the 1000-2000 MW range. Complementary with the new converter technology is a newly developed HVDC light cable based on modified triple extrusion technology and specially designed insulation material for operation with DC stresses. Such cables can be light and flexible even for fairly high ratings and can be installed in an manner by ploughing in ground, hanging overhead in air or for submarine transmissions. HVDC Light is excellent for transmitting power to distant loads and to feed power from distant generation into networks. Renewable generation is often small scale and local, such as wind, solar, tidal and also small hydro generation. In many cases such plants have been restricted in size or not been built because they have, for technical or economical reasons, not been possible to connect to an AC grid. By use of the combined system HVDC light converters and cables, it is possible to overcome the technical difficults to connect small scale generation to the AC grid and to make the connection economical and environmentally friendly.

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