Work

Reducing the Voltage Ripple of the Dc Link of a Solid-state Transformer

Year: 2026

Type: article

Abstract: At the stage of developing solid-state transformer (SST) technologies, engineers face additional challenges in ensuring high electricity quality. When using a single-phase input bridge rectifier, the instantaneous power of a single-phase network fluctuates with double frequency, while constant power is required at the SST output. To reduce the weight and dimensions, the authors proposed changing the TTT architecture and replacing high-capacity input capacitors with an active filter. The work synthesizes a semi-bridge active pulsation filter of the SSR DC insert, which includes auxiliary inductance and capacitance for energy storage. The authors developed an algorithm for filter operation and constructed a simulation model of the filter. Modeling results allowed evaluating the effectiveness of the proposed method. The half-bridge active filter significantly reduces ripple amplitudes with a slight decrease in efficiency. It is concluded that the use of the active filtering of SST DC voltage ripple reduces weight and size indicators while maintaining high quality indicators of electric power.

Source: Bulletin of the South Ural State University series Power Engineering

DOI: 10.14529/power260105

Authors: A.V. Vyngra, B.A. Avdeev

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: diamond

Funder: Russian Science Foundation

Award: G4749756631