Representation of FACTS devices in power system economic dispatch

The main idea behind FACTS (flexible AC transmission system) is to use network parameters as controls to direct flow, thus eliminating problems caused by unwanted loop or parallel flows. The authors present a methodology for the representation of FACTS device such as phase shifters and series compensations in optimal power flow models. The proposed approach is based on, mathematical decomposition and network compensation, techniques. It is possible to incorporate existing optimal power flow algorithms, thus taking advantage of accumulated experience in optimization methods and reducing software development costs. A case study with a Brazilian-derived system is presented