Abstract:
The interline power flow controller (IPFC) is one of the latest generation flexible AC transmission systems (FACTS) controller used to control power flows of multiple transmission lines. In recent years, power demand has increased substantially while the expansion of power generation and transmission. It has been severely limited due to limited resources and environmental limitations. Flexible AC Transmission Systems (FACTS) controllers have been mainly used for solving various power system steady state control problems. Interline Power Flow Controller is a versatile device can be used to control power flows of a multi-line system or sub-networks An Interline Power Flow Controller (IPFC) is a converter based FACTS controller for series compensation with capability of controlling power flow among multi-lines within the same corridor of the transmission line. It consists of two or more Voltage Source Converters (VSCs) with a common dc-link. Real power can be transferred via the common dc-link between the VSCs and each VSC is capable of exchanging reactive power with its own transmission system. In this paper, a control scheme of an IPFC system with two VSCs to compensate the impedances of two similarly dimensioned parallel transmission lines is presented. A Mathematical model of the IPFC is presented and the model is used to investigate the flexibility of power flow control, in the presence of operating constraints of the IPFC. In this paper, the application of Interline Power Flow Controller (IPFC) in damping of low frequency oscillations is investigated. The potential of various IPFC control signals upon the power system oscillation stability is investigated under various loading conditions.

Keywords: FACTS, IPFC, VSC, SSSC, Series Compensation, Voltage Stability, VSI, PSO, MATLAB/SIMULINK