Coordination of Power Flow Control in Large Power Systems

Implementation of a new electricity trading arrangement is imminent in the UK. It aims to improve power industry efficiency and economy, but its dynamic nature is also associated with more uncertainties. The flexible ac transmission systems (FACTS) concept is particularly applicable to a dynamically changing transmission system. Advantages of FACTS could be compromised by interactions in a transmission system, however, in particular where multiple power flow control devices are used. This paper addresses the coordination of power flow control in a large power system, managing transmission constraints to meet the security standards against the background of this open market structure.