07-06-2012, 03:51 PM
HVDC LIGHT TECHNOLOGY
HVDC LIGHT TECHNOLOGY SEMINAR.docx (Size: 166.32 KB / Downloads: 36)
Transmitting power at high voltage and in DC form instead of AC is a new technology proven to be economic and simple in operation which is HVDC transmission. The HVDC (High Voltage Direct Current) technology is used to transmit electricity over long distances by overhead transmission lines or submarine cables. It is also used to interconnect separate power systems. A further development in this technology is HVDC light where HVDC light converters are used for faster and efficient conversion of power.
HVDC Light is a fundamentally new power transmission technology developed recently. It is particularly suitable for medium to small-scale power transmission applications. This new transmission and distribution technology, HVDC Light provides animportant role 1to today’s requirements on our network systems and opens up new opportunities for both investors and environmentalist alike.
HVDC light technology for transmission of electric power
INTRODUCTION:
Competition in the electricity power industry, coupled with continued load growth requires that the existing transmission system assets are utilised moreeffectively and some times closer to their technical limits. As the existing AC lines become loaded closer to their thermal capacity with increasing losses and reduced power quality we face the risk of declining network stability. One solution would be to simply build new, more powerful AC lines.
But, it is getting increasingly difficult to obtain permits to build new high voltage Overhead transmission lines, the right-of-way occupies valuable land. Overhead lines change the landscape, causes public resentment and is often met by political resistance. People are increasingly concerned about the possible health hazards of living close to overhead lines.
causes such as storms, wind, earthquakes and fire. You simply bury it and
forget it.
• Operation and maintenance costs of the transmission easement are virtually
eliminated as there is no need for long term contracts to maintain the easement
with suitable access roads, thermographic checks of conductors joints,
insulator replacements, constant trimming and removal of regrowth vegetation
and public safety and security.
• The width of the corridor to install the underground cable can be as narrow as 4
metres, which will give greater flexibility with the selection of a transmission
