Stability Enhancement of HVDC System using Fuzzy based STATCOM

The necessity to deliver cost effective energy in the power market has become a major concern in this emerging technology era. Therefore, establishing a desired power condition at the given points are best achieved using power controllers such as the well known High Voltage Direct Current (HVDC) and Flexible Alternating Current Transmission System (FACTS) devices. High Voltage Direct Current (HVDC) is used to transmit large amounts of power over long distances or for interconnections between asynchronous grids. The system planner must consider DC alternative in transmission expansion. The factors to be considered are Cost, Technical Performance and Reliability. All these equipment provide controllability to the AC transmission system by adjusting the transmission parameters. In recent years fuzzy logic control is beginning to receive more attention. Power system operation conditions and topologies are time varying and the disturbances are unforeseeable. These uncertainties make it very difficult to effectively deal with power system stability problems through conventional controller that is based on linearized system model. Therefore the fuzzy logic control approach, is one area of artificial intelligence, has been emerging in recent years as a complement to the conventional approach. The focus of this Paper is to identify the improved transient Stability through control scheme and comprehensive analysis for a Static Synchronous Compensator (STATCOM) on the basis of theory computer simulation. By Introducing FACTS Controller into HVDC system we can improve the power transmission capability and System stability.