THE COMPENSATATION OF UNBALANCED 3-PHASE CURRENTS IN TRANSMISSION SYSTEMS ON UTILIZE DISTRIBUTED POWER FLOW CONTROLLER

Abstract

It is self-possessed of the Distributed Power Flow Controller is a new device within the family of FACTS. Power Quality is becoming an important issue for both electric utilities and end users. So the paper concentrate on one of the issue of power quality that is voltage sag compensation. My paper deals with the operation principle of a Practical Design and Implementation Procedure of Utilize Distributed Power Flow Controller (DPFC) to Compensate Unbalanced 3-phase Currents in Transmissions Systems. The series converters of the DPFC are single phase, the DPFC can compensate both active and reactive, zero and negative sequence unbalanced currents. To compensate the unbalance, two additional current controllers are supplemented to control the zero and negative sequence current respectively. FACTS devices can be employed to compensate the unbalanced currents and voltages in transmission systems. Unfortunately, it is found that the capability of most of FACTS devices to compensating unbalance is limited. Series and shunt FACTS device can only provide compensation of unbalanced reactive currents and the most powerful device – the UPFC cannot compensate zero-sequence unbalance current, because of the converter topology. My paper will show that the so-called DPFC can compensate both active and reactive, zero and negative sequence unbalanced currents. My paper consists of both active and reactive variations, using MATLAB/SIMULINK is simulated and its effects on the transmission lines observed. The simulated results are analyzed and validated with the real time results for the system considered