ABSTRACT
Power quality requirement is one of the most important issues for power distribution system. Voltage sag and swells are major power quality issue in distribution system due to non linear loads and superconducting devices use in power electronics converters. To compensate these problems, custom power devices are used. Today the custom power device DVR is used to compensate sag and swell but it required real power and reactive power injection in to distribution system. Real power required external energy storage device whereas reactive power generated within the DVR. Capacity of storage unit decides the ability of DVR to compensate voltage sag. To increase the compensation capacity of system, this paper proposed the Interline dynamic voltage restorer concept. IDVR consist of several DVRs, when one of the DVR compensates for voltage sag appearing in that feeder at the same time others DVRs replenish the energy in the common DC link dynamically. The three phases IDVR system for high voltage is design with space vector pulse modulation technique for generation of reference signal. The close loop control scheme is also add the effectiveness in the system while modeling and simulation of interline dynamic voltage restorer. The simulation results obtained for IDVR are analyzed and presented to show the effectiveness and efficiency of the proposed IDVR system.
