This paper presents a design of converter controllers
and filters of Line Commutated Converter High voltage direct
current (LCC-HVDC) power transmission system to increase
loadability and reliability of long power transmission. Also the
proposed tuned PI controllers for HVDC Converters are verified
in sense of HVDC transmissionsystem performance and
reliability. The studied system performances are compared with
HVAC transmission systems in terms of power transfer quantity
and reliability for a wide range of transmission distances and
operating conditions. The Power Quality of HVDC transmission
system is studied with Filters and proposed PI controllers .The
two transmission systems (HVDC & HVAC) are simulated using
MATLAB SIMULINK software package. With the control
strategy, the HVDC system can provide a useful and economical
way to transmit electric power over the long distance compared
with HVAC system.