Basic control of interline power flow controller

An interline power flow controller (IPFC) is a VSC-based FACTS controller for series compensation with the unique capability of power flow management among multi-lines of a substation. In this paper, the basic characteristics of the IPFC are discussed and two basic control systems for the IPFC to follow the reference receiving end active and reactive power inputs are presented. The special control scheme is designed for the power flow control of a transmission system with two identical parallel lines while the general control scheme can be used to solve the power flow control problem in a multi-line transmission system. Digital simulation studies in PSCAD/EMTDC are also conducted to demonstrate the proposed control systems of the IPFC.