Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters

Magnetic Integrated Multi-Trap Filters Using Mutual Inductance to Mitigate Current Harmonics in Grid-Connected Power Electronics Converters

This paper introduces magnetic integrated high-order trap–trap–inductor (<i>TTL</i>) and inductor–trap–trap (<i>LTT</i>) filters featuring two <i>LC</i>-traps designed for grid-tied inverters, aimed at reducing the size of output-power multi-trap filters. The prop...

Full description

Saved in:
Bibliographic Details
Main Authors: Maged Al-Barashi, Aicheng Zou, Yongjun Wang, Wei Luo, Nan Shao, Zeyu Tang, Bing Lu
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Energies
Subjects:
harmonic distortion
<i>LC</i>-trap passive filters
magnetic integration
multi-trap filters
switching harmonics
Online Access:https://www.mdpi.com/1996-1073/18/2/423
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper introduces magnetic integrated high-order trap–trap–inductor (<i>TTL</i>) and inductor–trap–trap (<i>LTT</i>) filters featuring two <i>LC</i>-traps designed for grid-tied inverters, aimed at reducing the size of output-power multi-trap filters. The proposed filters exhibit excellent harmonic absorption capabilities alongside a compact design. Building on the conventional integrated inductor–capacitor–inductor (<i>LCL</i>) filter, the approach involves connecting a small capacitor in parallel with either the inverter-side or grid-side inductors to create an <i>LC</i> trap. Additionally, a second <i>LC</i> trap can be achieved by integrating the filter capacitor in series with the equivalent trap inductance, established by the magnetic coupling between the grid-side inductor and inverter-side one. This paper thoroughly analyzes the characteristics of the proposed filters. Moreover, a design method is presented to further minimize the size of the output filter components. Finally, validation through simulations and hardware-in-the-loop (HIL) experiments confirms the proposed approach’s effectiveness and feasibility. The integrated designs achieve a size reduction of 35.4% in comparison with the discrete windings. Moreover, these designed filters comply with IEEE standards, maintaining a grid-side current total harmonic distortion (THD) of less than 0.9%, with all current harmonics below 0.3% of the fundamental current.
ISSN:1996-1073

Similar Items