Power System Stability using Interline Power flow Controller in Multiline Transmission System

In this paper, a circuit model for IPFC is developed and simulation of interline power flow controller is done using the four bus system circuit model. Simulation is done using MATLAB/ Simulink. IPFC in an integrated power system networks. Authors strongly believe that this survey article will be very much useful to the researchers for finding out the relevant references in the field of enhancement of power system stability by using different FACTS controllers in an integrated power system network. Interline Power Flow Controller (IPFC), is an advanced voltage-sourced converter (VSC) based FACTS (Flexible AC Transmission Systems) controller suitable for the power flow management of multiline systems. In recent years, power demand has increased substantially while the expansion of power generation and transmission has been severely limited due to limited resources and environmental restrictions. In its general form the interline power flow controller employs number of DC to AC inverters each providing series compensation for a different line The reactive voltage injected by individual Voltage Source Converter (VSC) can be controlled to regulate active power flow in the respective line. While one VSC regulates the DC voltage, the other one controls the reactive power flows in the lines by injecting series active voltage. Since each inverter is also able to provide reactive compensation, the IPFC is able to carry out an overall real and reactive power compensation of the total transmission system. This capability makes it possible to equalize both real and reactive power flow between the lines, transfer power from overloaded to under loaded lines, compensate against reactive voltage drops and the corresponding reactive line power, and to increase the effectiveness of the compensating system against dynamic Disturbances.