A Cooperative Scheme for Voltage Ripple Extraction and Suppression in DC Distribution Networks Based on TTAO–VMD and Improved DC-APF
Year: 2026
Type: article
Abstract: Voltage ripple is a significant power-quality concern in DC distribution networks, and effective suppression requires precise extraction of the ripple components. Traditional methods, such as low-pass filtering, often suffer from inaccurate band division and limited dynamic adaptability, which constrain the performance of DC active power filters. To address these challenges, this paper proposes a collaborative governance scheme with two main innovations. First, a triangular topology aggregation optimizer (TTAO) is introduced to adaptively adjust the penalty factor and modal number in variational mode decomposition (VMD), minimizing envelope entropy for high-precision, real-time ripple extraction. Second, an improved parallel active DC filter (DC-APF) based on a buck-boost topology is developed, utilizing a dual-loop control strategy that integrates feedforward and feedback for rapid, accurate compensation current tracking. Simulation results show that the TTAO-VMD algorithm effectively prevents modal aliasing and achieves a maximum absolute ripple extraction error of less than 0.02 V. The DC-APF, using this accurate signal, reduces the DC bus voltage ripple peak-to-peak value from 32 V to 0.3 V (99.06% suppression) and lowers total harmonic distortion from 1.85% to 0.17%. These results demonstrate the scheme’s effectiveness for ripple control in DC distribution networks.
Source: IEEE Access
Authors: Yi Zhang, Menghan Wang, Baojiang Wu, Sian Chen
Language: English
Topic: Power Quality and Harmonics
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,075
Award: G3818459895
OpenAlex ID: W7163918942