PERFORMANCE ANALYSIS OF INTERLINE UNIFIED POWER FLOW CONTROLLER FOR PARALLEL TRANSMISSION LINES

In modern power systems, there is a increase in power demand continuously. To meet the change in power demand the power flow on the transmission lines are actively controlled. Power flow controlling devices are required for such purpose among all PE Power flow control devices; the Unified Power Flow Controller (UPFC) is used to control the power flow on the single transmission line and Interline power flow controller (lPFC) is used to control the power flow in the parallel transmission lines or on the multi-lines. Interline unified power flow controller (IUPFC) is a new device, which is the modified version UPFC and IPFC. In this paper, it is proposed to develop Interline unified power flow controller (IUPFC) using 48 pulse voltage source converter to provide the quality power supply. Shunt and series converters are combined together. It improves the power flow on one transmission line in a power system and it regulates bus voltage in another transmission line. It does not need a additional coupling transformers. The lowest order harmonic present in the output voltage will be 47th harmonic. IUPFC is a combination of STATCOM and SSSc. The performances of the IUPFC are to be analyzed on the parallel transmission lines. The model has to be simulating with Matlab simulink program to demonstrate system behavior of Interline unified power flow controller. Numerical results are to be demonstrated on the practical Bus system with the Interline unified power flow controller model. It has to be validating that there is a possibility of regulating active power flow, reactive power flow and minimizing the power losses simultaneously with proposed IUPFC parameter.