Mitigation of Voltage Sag and Swell Using Distributed Power Flow Controller

Abstract

ABSTRACT:Modern power utilities have to respond to a number of challenges such as growth of electricity demand especially in non-linear loads in power grids; consequently,That higher power quality should be considered. In this paper, DPFC which is similar to unified power flow controller (UPFC) in structure, which is used to mitigate the voltage sag and swell as a power quality issue. Unlike UPFC, the common dc-link in DPFC, between the shunt and series converter devices should be eliminated and three-phase series converter is divided to several single-phase series distributed converters through the power transmission line. And also to detect the voltage sags and find out the three single-phase reference voltages of DPFC, the synchronous reference frame method is proposed. Application of DPFC in power quality enhancement is simulated in Mat lab/Simulink environment which show the effectiveness of the proposed structure KEYWORDS: FACTS, power quality, sag and swell mitigation, distributed power flow controller.

A Study of Voltage Sag in Distribution System and Evaluation of the Effect of Wind Farm Equipped With Doubly-Fed Induction Generator

“…Several paper or research work on voltage reduction has been reported in distribution systems [40,41]. The voltage sag in loop power distribution systems has been evaluated and analyzed by installing a superconducting fault current limiter [42], and the results are compared in two radial and loop power distribution systems.…”