Power Quality Enhancement In 3-Phase 4-Wire Distribution System Using Custom Power Devices

The main cause of power quality troubles are failure supply & load unbalances. The power quality problems related to voltage point of common coupling and voltage deformation, voltage flicker, voltage unbalance, voltage sag and voltage expansion. Power quality problems in 3-phase 4-wire power distribution systems are failure of capacitor banks, noise, vibrations, and induction motors. This article describes how to use DSTATCOM to improve power quality in 3-phase 4-wire power distribution systems. An instantaneous reactive power theory-based PI controller is implemented in this manuscript for power quality enhancement. The main objectives of this paper are to maintain IEEE 519 standard, eliminate voltage-related power quality problems and reduce harmonics in the three-phase distribution supply.