Design of Distributed FACTS Controller and Considerations for Transient Characteristics

Flexible AC transmission systems (FACTS) devices are used to control power flow in the transmission grid to relieve congestion and limit loop flows. However, widespread adoption of this technology has been hampered by high cost and reliability concerns. The concept of distributed FACTS (D-FACTS) devices, as an alternative approach to realizing cost-effective power flow control, has been recently proposed. This paper discusses design of distributed FACTS controller, and then researches on the transient influence of distributed power control solutions on the power grid, with series active variable inductance (AVI) compensation, changing the impedance of the power line so as to control power flow. Implementation and system effects are presented in the paper, along with experimental results