Interline power flow controller (IPFC) to enhance the optimal power flow

This paper presents a mathematical model of IPFC, termed as power injection model (PIM). This model is incorporated in Newton-Raphson (NR) power flow algorithm to study the power flow control in transmission lines in which IPFC is placed. By utilizing this device(IPFC), an enhanced controllability over independent transmission systems or those lines whose sending-end are connected to a common bus, can be obtained. The power flow through the line can be regulated by controlling both magnitudes and angles of the series voltages injected by an IPFC. Generally, the IPFC employs multiple dc-to-ac inverters providing series compensation for a different line respectively. A program in MATLAB has been written in order to extend conventional NR algorithm based on this model. Numerical results are carried out on a standard 2 Machine 5 Bus system. The results without and with IPFC are compared in terms of voltages, active and reactive power flows to demonstrate the performance of the IPFC model.