13-02-2016, 04:16 PM
Abstract
This paper describes the updated form of HVDC known as HVDC Light.The HVDC Light technology, is well suited to meet the new markets and its demands and the reasons for this are explained. HVDC Light is the most interesting power transmission system using high voltage direct current."HVDC Light" which uses pulse width modulation. It extends the economical power range of HVDC transmission down to just a few tens of megawatts (MW).
Introduction
Nowadays there is a huge competition in the electrical industry as a means of achieving cost effective outcomes. So most of the long AC transmission lines in the world are replaced by HVDC transmission lines because of their economical properties. Though HVDC transmission line has many advantages there are some limitations too. So, some of the HVDC transmission lines are replaced by the HVDC Light to meet the limitations of HVDC.HVDC transmission originated in Germany during Second World War.The first commercial line was installed in Sweden in 1954.Some of the specialties of the HVDC Transmission lines are:-
Lower investment and lower losses for bulk power transmission
Asynchronous interconnections
No contribution to Short circuit power
Improved transmission in parallel AC circuits
Instant and precise power flow control