A Novel Solar Photovoltaic Fed TransZSI-DVR for Power Quality Improvement of Grid-Connected PV Systems

Ali Moghassemi,Vigna K Ramachandaramurthy,Massimo Mitolo,Sanjeevikumar Padmanaban,Mohamed Benbouzid

doi:10.1109/access.2020.3048022

Abstract

In this article, a new solar PV fed Dynamic Voltage Restorer (DVR) based on Trans-Z-source Inverter (TransZSI) is proposed to improve the power quality of on-grid Photovoltaic (PV) systems. DVR is a power electronic compensator using for injecting the desired voltage to the Point of Common Coupling (PCC) as per the voltage disturbance. In the proposed DVR, in place of traditional VSI, TransZSI with outstanding merits of buck/boost, a broader range of voltage boost gain, fewer passive components, and lower voltage stress, is put forth. For efficient detection, accurate voltage disturbances mitigation, and also lessening the injected voltage harmonics, a hybrid Unit Vector Template with Maximum Constant Boost Control (UVT-MCBC) method is proposed for TransZSI-DVR. The performance of the proposed TransZSI-DVR with UVT-MCBC has been analyzed under severe sag, slight sag with harmonics, swell, and interruption. The comparative studies and simulation results have shown the effectiveness of the proposed TransZSI-DVR, as opposed to traditional ZSI-DVR and VSI-DVR. The TransZSI-DVR in the PV system has mitigated voltage sag/swell/interruption. It has also improved the power quality of both the injected voltage to the PCC and PV system’s output voltage.

Highlights

For environmental concerns and development towards a sustainable society, the future power systems will have a high penetration of solar PV and wind power systems
SIMULATION RESULTS the performance evaluation of the proposed PV fed TransZSI-Dynamic Voltage Restorer (DVR) configuration is simulated carried out, and the results are compared to the outcomes of traditional voltage source inverter (VSI)-DVR and ZSI-DVR configurations where VSI and ZSI are used, respectively
In all strategies presented in this article, four various voltage disturbances as severe voltage sag (75%), slight voltage sag with harmonics (50%), voltage swell (20%), and interruption (100%) are applied

Summary

Introduction

For environmental concerns and development towards a sustainable society, the future power systems will have a high penetration of solar PV and wind power systems. The performance of the PV systems can be handed down affected by factors like solar irradiation, temperature, soiling, clouds, etc. Resulting in a reduction in the PV output voltage and voltage sag, as the most commonplace yet vital power quality issues, happens. With an increase in the number of sensitive and critical loads in the modern power system, power quality issues like sags, swells or interruptions have enlarged. Such power quality issues result in considerable losses such as losses related to producer’s competitive opportunities, reduced efficiency, increased production and maintenance costs, reduced product quality, decreased equipment lifespan, and production interruptions and energy losses. Having high-quality power accessing high-quality power has a tremendous impact on saving capital and has an economic advantage for a manufacturing company [2]–[4]

Methods

Results

Conclusion