Recent trends on FACTS and D-FACTS

Modern power systems are continuously being expanded and upgraded to cater the need of ever growing power demand. But, in recent years, energy planners have faced financial and environmental difficulties in expanding the power generation and transmission systems. These difficulties included limited available energy resources, time and capital required and also the land use restrictions etc. These situations have forced planning engineers to look for new techniques for improving the performance of existing power system. This is a review paper to analyze the current trends in FACTS and D-FACTS to improve the performance of power system performance. It contains work which has been carried out by various researchers in the field of FACTS and D-FACTS.