An experimental approach of DVR for relieving voltage dip and voltage swells

Abstract

Abstract Based on recent power quality studies, voltage dip and swells in the medium and low voltage distribution grid are regarded as the most frequent form of power quality problems. Their effect is serious on sensitive loads. The effect varies from load disturbances to major economic losses to millions of dollars. Different solutions have been developed to defend sensitive loads against such disturbances, but the most powerful and efficient solution is considered to be the DVR..In this paper, the hardware setup of DVR to relieve the voltage dip and swell has implemented by the use of the micro-controller and control circuit for the H-bridge inverter. The system suggested in the article provided has a limited variety of changing devices that decreases the intricacy of the circuit as well as using the microcontroller (LPC2148) to use a simple control circuit. The multi-level inverters give almost sinusoidal result waveform, the result exists with polished harmonic account and switching losses that are less than the traditional level inverter, and thus smaller filter dimension is needed. Regular cascaded MLI as well as various other current7-level reduced switch topologies making use of carrier-based PWM methods, the performance top quality in terms of THD, and also switching losses of the brand-new MLI compared.