A fuzzy logic controller for interline power flow controller model implemented by ATP-EMTP

The interline power flow controller is a new concept for the compensation and effective power flow management of multi-line transmission systems. In this paper, the IPFC employs two DC/AC inverters with a common DC-link, each to provide series compensation for a selected line of the transmission system. Because of the common DC-link, any inverter within IPFC is able to transfer real power to any other. Naturally, each inverter is able to provide reactive compensation. The main purpose of this paper is to extend the nonconventional controller previously proposed by the authors for unified power flow controller to interline power flow controller. The proposed controller is used to arrange the controls of the series inverters, in order to take into account, by approximated reasoning, the system nonlinearity and inverters´ interactions. Some simulation cases are considered to compare the performance of the proposed controller with respect to that of other conventional controllers. For this investigation ATP-Electromagnetic Transients Program is used as the study tool.