SMES Technology, SMES and Facts System, Applications, Advantages and Technical Limitations

2 Abstract: This paper introduces with the SMES Technology, its working principle, requirements and applications, Implementation of SMES in FACTS. Addition of Power electronic based flexible ac transmission (FACTS) Systems to power transmission and distribution systems at strategic locations improves the system performance. These devices can be used to control power flow on a transmission line by injecting a serie s voltage into the line or they can also support the voltage at a bus through shunt voltage injection. A SMES coil could instead be incorporated onto the DC bus. Interfacing the coil to the ac system through a current source inverter results in a device that injects a controlled current with the ability to regulate ac voltage or power flow under normal conditions and supply when the power supply is off-line. Some of the SMES applications are elucidated in this paper. Advantages over other technologies and technical limitations associated with the SMES Technology are discussed in this paper.