Details

Autor(en) / Beteiligte

• Chuang Liu
• Yuemei Zhi
• Yue Zhang
• Guowei Cai

Titel

New breed of solid-state transformer distribution tail system for flexible power conversion between medium-voltage distribution and low-voltage customer side

Ist Teil von

• 2016 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2016, p.403-407

Ort / Verlag

IEEE

Erscheinungsjahr

2016

Quelle

IEEE Electronic Library Online

Beschreibungen/Notizen

• This paper proposes a new breed of solid-state transformer (SST) distribution tail system mainly based on hybrid cascaded multilevel converter and resonant DC-DC converters between medium-voltage distribution and low-voltage customer side. The proposed SST topology mainly combines per-phase cascaded H-bridge converters based on the DC transformers (DCTs) with the square-wave two-level VSC based on the assembled DCT together. The proposed system can offer the operational flexibility for active and reactive power control for medium-voltage side based on the simplified single-stage control system structure concept thanks to the characteristics of the resonant DC-DC converters working under the quasi-resonant mode. Additionally, compared to the existing SST systems, it offers better features such as smaller space volume, simpler control system, lower unit cost, etc. To illustrate the feasibility of the proposed SST distribution tail system, this paper assesses its dynamic performance during steady-state and network alterations.