Development of a Low Harmonic Distortion Three-Phase Inverter for Renewable Grid Integration

Abstract

The growing use of renewable energies like wind and solar energy in the current power systems has made it more important to seek more efficient and grid-compliant techniques of converting power. Three-phase inverters are essential to bridge these renewable sources to the utility grid but traditional inverter designs tend to have high harmonic distortion that negatively affects the quality of power and non-conformity to grid requirements. In this paper, results have been provided about the design of a low harmonic distortion three phase inverter based on an advanced pulse width modulation (PWM) method, in this case, Space Vector Pulse Width Modulation (SVPWM). The suggested technology effectively increases the use of the DC bus voltage, as well as minimises the overall harmonic distortion (THD) in the output signal, as compared to traditional Sinuoidal PWM (SPWM) techniques. An in-depth mathematical model of inverter and control strategy is made and MATLAB/Simulink is used to implement and analyse the system. The suggested SVPWM-based inverter is also compared based on the THD, quality of the waveforms, and the stability of the system. The results of simulation show that a significant decrease in THD is reached with the values being within the thresholds provided by the IEEE, and it is approximately 40 to 60 times better than the traditional techniques. In addition, the efficiency of the suggested strategy is proven by the analysis based on the experimental or, the prototype. The findings affirm that the designed inverter is very appropriate in connexion to renewable grids with advance quality of power and dependability.