Design of Hybrid Systems with Transzsi-DVR for Mitigation of Power Quality Issues

The quality of power supplied by electrical utilities has become a significant concern due to its potential impact on both power companies and their customers. The identification and analysis of power disturbances, such as voltage sag, swell, and interruptions, have resulted in an increased awareness of the importance of power quality. These power quality issues can cause deviations in current, voltage, and frequency, leading to damage or failure of equipment used by end-users. To address these issues, the use of specialized power converters, such as the TransZSI based DVR, is crucial, injecting a desired voltage at the PCC. Adopting this method has several advantages compared to the conventional Voltage Source Inverter (VSI), such as the ability to buck or boost, minimized passive segments, amplification of voltage, and diminished voltage stress. Through MATLAB simulation, the efficacy of the TransZSI-DVR was compared to conventional ZSI and VSI-DVR and found to be superior. The usefulness of it was further validated through the implementation of the (UVT-MCBC) hybrid technique, which controls injected voltage harmonics.