scholarly journals Design and Control of a 13.2 kV/10 kVA Single-Phase Solid-State-Transformer with 1.7 kV SiC Devices

Energies ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 201 ◽  
Author(s):  
Jeong-Woo Lim ◽  
Younghoon Cho ◽  
Han-Sol Lee ◽  
Kwan-Yuhl Cho
Keyword(s):  
Solid State ◽  
Single Phase ◽  
Solid State Transformer ◽  
And Control

scholarly journals The Stability Analysis of a Multi-Port Single-Phase Solid-State Transformer in the Electromagnetic Timescale

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2250 ◽  
Author(s):  
Rui Wang ◽  
Qiuye Sun ◽  
Qifu Cheng ◽  
Dazhong Ma
Keyword(s):  
Stability Analysis ◽  
Solid State ◽  
Single Phase ◽  
Control Strategies ◽  
Current Source ◽  
Practical Stability ◽  
Stability Assessment ◽  
Solid State Transformer ◽  
The Stability ◽  
Signal Sinusoïdal

This paper proposes an overall practical stability assessment for a multi-port single-phase solid-state transformer (MS3T) in the electromagnetic timescale. When multiple stable subsystems are combined into one MS3T, the newly formed MS3T has a certain possibility to be unstable. Thus, this paper discusses the stability assessment of the MS3T in detail. First and foremost, the structure of the MS3T and its three stage control strategies are proposed. Furthermore, the stability analysis of each of the MS3T’s subsystems is achieved through the closed loop transfer function of each subsystem, respectively, including an AC-DC front-end side converter, dual active bridge (DAB) with a high-frequency (HF) or medium-frequency (MF) transformer, and back-end side incorporating DC-AC and dc-dc converters. Furthermore, the practical impedance stability criterion in the electromagnetic timescale, which only requires two current sensors and one external high-bandwidth small-signal sinusoidal perturbation current source, is proposed by the Gershgorin theorem and Kirchhoff laws. Finally, the overall stability assessment, based on a modified impedance criterion for the MS3T is investigated. The overall practical stability assessment of the MS3T can be validated through extensive simulation and hardware results.

A Hybrid Modular DC Solid-State Transformer Combining High Efficiency and Control Flexibility

2020 ◽  
Vol 35 (4) ◽  
pp. 3434-3449 ◽  
Author(s):  
Yuwei Sun ◽  
Zhen Gao ◽  
Chao Fu ◽  
Chengjie Wu ◽  
Zhe Chen
Keyword(s):  
Solid State ◽  
High Efficiency ◽  
Solid State Transformer ◽  
And Control

scholarly journals Development of Solid-state Transformer for 6.6-kV Single-phase Grid with Automatically Balanced Capacitor Voltage

2019 ◽  
Vol 8 (5) ◽  
pp. 795-802 ◽  
Author(s):  
Jun-ichi Itoh ◽  
Kazuki Aoyagi ◽  
Keisuke Kusaka ◽  
Masakazu Adachi
Keyword(s):  
Solid State ◽  
Single Phase ◽  
Solid State Transformer ◽  
Capacitor Voltage

500kVA Hybrid Solid State Transformer (HSST): Modelling and Control

2021 ◽  
Author(s):  
Sanjay Rajendran ◽  
Soumik Sen ◽  
Zhicheng Guo ◽  
Alex Q. Huang
Keyword(s):  
Solid State ◽  
Solid State Transformer ◽  
And Control

scholarly journals Improving the Electricity Quality by Means of a Single-Phase Solid-State Transformer

Designs ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 35
Author(s):  
Boris Avdeev ◽  
Aleksei Vyngra ◽  
Sergei Chernyi
Keyword(s):  
Spectral Analysis ◽  
Solid State ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Solid State Transformer ◽  
Inductive Load ◽  
Load Current ◽  
Transient Phenomena ◽  
Better Than

The paper describes the use of a single-phase three-stage solid-state transformer in networks with non-sinusoidal voltages in order to improve the quality of electricity. An active-inductive load was chosen as the load. The solid-state transformer was simulated by the Matlab/Simulink software. Its performance was analyzed and the parameters for optimal performance were specified. The voltage and current graphs on the load and their spectral analysis are given. Total harmonic distortion was evaluated for current and voltage. As a comparison, the operation of a classic transformer was simulated. Modeling shows that solid-state transformer copes with improving the quality of electricity better than a classical transformer. In addition to improving the quality of the load current, the solid-state transformer protects the consumer from overvoltage, voltage dips, and other transient phenomena, due to the accumulated supply of electricity in the capacitors of the DC-Bus.

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