Work

Adaptive Mode-Switching strategy for Frequency-Adaptive repetitive control in active power filters

Year: 2026

Type: article

Abstract: Repetitive control is extensively employed for harmonic suppression in active power filters. However, its performance degrades under power supply frequency variations. This paper proposes a fractional order repetitive controller based on Newton interpolation with fixed int(N) and a fractional order repetitive controller with adjustable duty cycle to solve this problem from different perspectives. The fractional order repetitive controller based on Newton interpolation with fixed int(N) yields the most rapid convergence and minimal current overshoot. In contrast, the fractional order repetitive controller with adjustable duty cycle is highly effective in compensating for large frequency deviations. This paper, therefore, introduces a fractional-order repetitive control strategy incorporating a mode-switching mechanism based on these two methods. The proposed approach maintains the advantages of fast convergence and low overshoot while simultaneously ensuring a rapid response to significant frequency variations.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2026.111421

Authors: Min Zheng, Junhao Yuan, Hongyang Zhai, Yajian Zhang, Qiang Wang

Institution: Shanghai University

Language: English

Topic: Power Quality and Harmonics

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,940

Funder: National Natural Science Foundation of China