Design and Implementation of Active Voltage Conditioner in Low-Voltage Distribution System

Abstract

One of the main problems in low voltage (LV) distribution system is maintaining voltage magnitude close to the nominal value for sensitive loads such as industrial manufacturing or communication devices. This paper introduces a novel concept of a three-phase Active Voltage Conditioner (AVC) system that is able to compensate voltage sag and swell. The AVC is based on a three-phase voltage source inverter and a three full-bridge voltage-source converters with a common DC-link, which is implemented in this work to overcome the conventional dynamic voltage restorers (DVR). The design and implementation of the proposed AVC concept effectively regulate the load voltage with an ignorable overshoot within just one cycle of grid voltage. The proposed concept is verified in a 5kVA three-phase prototype active voltage conditioner with the control system implemented on a 32-bit floating-point digital signal processor (DSP) TMS320F28377s. The efficacy of the proposed work is demonstrated through comprehensive experimental results. © JES 2020. on-line: journal.esrgroups.org/jes.