Designing an $18-$Pulse Transformer for Harmonic Reduction

Due $13$ January $202523$:$59$

Instructions

Objective:

The goal of this project is to utilize IEEE Standard $519($Chapters $1-4)$ to design a Phase$-$Shift Transformer $($PST$)$ whose primary function is to reduce the harmonics generated by the rectifier inside a Variable Frequency Drive $($VFD$).$

VFDs control motor speed by varying the input frequency. The first stage in a VFD typically involves converting AC to DC using a rectifier. Commonly, a simple $6-$pulse uncontrolled rectifier is used, which introduces harmonics at the Point of Common Coupling $($PCC$),$ directly connected to the power utility. This results in reduced power factor and other power quality issues. To address this, an $18-$pulse transformer can be used to mitigate harmonics through angular phase shifting.

Instructions:

Study Material:

Read Chapters $1-4$ of IEEE Standard $519$ to understand harmonic limits$,$ their impact on power systems, and harmonic mitigation techniques.

Review the attached resources to understand how an $18-$pulse transformer achieves harmonic reduction.

Design Requirements:

Create a Simulink model for the $18$pulse transformer design using MATLAB $2020$a$.$

Document your design in a detailed report covering the following points:

Design Parameters:

The chosen phase shift for the transformer.

Points

$100$ points possible