Open AccessFrequency‐domain‐based complete loss model for 10 kV/1 MW solid‐state transformer
Author(s) -
Liu Tao,
Hao Xiang,
Liu Weizeng,
Li Zhi,
Yu Xiangen,
Zeng Jie,
He Jianzong
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.9145
Subject(s) - transformer , solid state , materials science , frequency domain , electrical engineering , nuclear engineering , computer science , physics , engineering , voltage , engineering physics , computer vision
This study proposes a frequency‐domain‐based loss model for dual active bridge (DAB) inside modular multi‐level cascaded solid‐state transformer (SST). Previously, the loss model is mainly derived in the time domain and requires enormous modelling effort. This study establishes the frequency‐domain model of DAB. Based upon that, the switching loss, conduction loss and ferrite loss are derived. The loss model is then used to determine the control scheme for SST. The effect of a PR controller and notch filter on DAB is compared, and the detailed loss analysis is also presented. For the DAB control with a notch filter, it obtains higher efficiency and is implemented in the SST system. The experiment results in both DAB and SST systems verify the effectiveness of the proposed methods.