Frequency-domain-based complete loss model for 10 kV/1 MW solid-state transformer

The Journal of Engineering

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[1] Dongguan Power Supply Bureau, Guangdong Power Grid Company, Dongguan 523000, People's Republic of China;Micro-Grid Department, TBEA Sunaoasis Co. Ltd., Xi'an 710019, People's Republic of China;Storage System Department, Guangdong Electric Power Research Institute, Guangdong 510080, People's Republic of China;

关键词: frequency-domain analysis;    losses;    notch filters;    power transformers;    power system control;    frequency-domain-based complete loss model;    switching loss;    conduction loss;    ferrite loss;    notch filter;    DAB control;    SST system;    modular multi-level cascaded solid-state transformer;    PR controller;   

DOI  :  10.1049/joe.2018.9145

来源: publisher

【 摘 要 】

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.

【 授权许可】

CC BY