Research on a new active power filter topology based on chopper circuit

TL;DR

This paper introduces a novel active power filter topology based on chopper circuits that utilizes the existing power supply's ripple to reduce current and voltage fluctuations, simplifying the structure and improving performance.

Contribution

A new APF topology using chopper circuits is proposed, eliminating the need for extra power supply and addressing limitations of traditional APFs.

Findings

Feasibility confirmed through experiments

Effective ripple suppression demonstrated

Simplified structure compared to traditional APFs

Abstract

The active power filter (APF) is attracting more and more attention for its outstanding performance in current and voltage ripple compensation. As modern high-energy accelerators are demanding much more stringent current ripple guideline, the APF is introduced to the magnet power supply (MPS) in accelerator system. However, the conventional APF has a lot of shortages and drawbacks due to its traditional topology, such as complex structure, nonadjustable working voltage, requirement of power supply, and so on. This paper proposes a new topology of APF, which is working as two types of chopper circuits. This APF need not extra electricity, but to use the power of the MPS current ripple to realize ripple depressing. At the end of this paper, the experiment result proves its feasibility and effect.