A new interline DVR with displacement factor improvement using fuzzy logic controller for voltage unbalance condition

A new interline dvr with displacement factor improvement using fuzzy logic controller for voltage sags and swells condition have been designed. Generally interline dynamic voltage restorer (IDVR) is employed in distribution systems to mitigates voltage sag and swell problems. An IDVR consists of several dynamic voltage restorers (DVRs) sharing a common dc link connecting independent feeders. One of the DVRs compensates for the local voltage sag in its feeder; the other DVRs replenish the common dc-link voltage. For normal voltage levels, the DVRs should be bypassed or un-operated. Generally instead of bypassing the DVRs, this paper proposes a new operating technique to improve the displacement factor (DF) of one of the involved feeders. DF improvement can be achieved via active and reactive power exchange between two different feeders. The fuzzy logic controller improves the performance and reduces the total harmonic distortion. Simulation results can be shown the performance of proposed converter using MATLAB software