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.

scholarly journals Solid-State Transformer (S2T) of Single Phase Matrix Converter

2018 ◽  
Vol 9 (3) ◽  
pp. 997
Author(s):  
Zafirah Zainuddin ◽  
Rahimi Baharom ◽  
Ihsan Mohd Yassin ◽  
Khairul Safuan Muhammad
Keyword(s):  
Solid State ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Matrix Converter ◽  
Solid State Transformer ◽  
Inductive Load ◽  
Electronic Transformer ◽  
Switching Algorithm ◽  
Optimal Efficiency

<span lang="EN-US">Solid-State Transformer (S2T) also known as Power Electronic Transformer (PET) is applied in various industrial fields compared to the conventional transformer due to it flexible voltage transfer ratio, high power density, and low harmonic distortion. This paper presents the S2T of Single Phase Matrix Converter (SPMC) that acts as cyclo-converter. A 1kHz frequency was synthesized on the primary side of the transformer using Pulse Width Modulation (PWM) technique, whilst, the output converted by the SPMC that produces the 50Hz frequency. A part of AC to AC operation, the switching algorithm for safe-commutation technique is also presented to solve the commutation problem caused by the usage of inductive load. Minimization of size, losses and optimal efficiency are the advantages of this approach. The proposed model was simulated by using MATLAB/Simulink (MLS).</span>

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.

scholarly journals Design of Three Phase Solid State Transformer Deployed within Multi-Stage Power Switching Converters

2019 ◽  
Vol 9 (17) ◽  
pp. 3545 ◽  
Author(s):  
Umair Tahir ◽  
Ghulam Abbas ◽  
Dan Glavan ◽  
Valentina Balas ◽  
Umar Farooq ◽  
...  
Keyword(s):  
Solid State ◽  
Power Flow ◽  
Harmonic Distortion ◽  
Iron Core ◽  
Switching Frequency ◽  
Switching Converters ◽  
Renewable Energy Resources ◽  
Solid State Transformer ◽  
Power Switching ◽  
Bidirectional Power Flow

This paper presents a symmetrical topology for the design of solid-state transformer; made up of power switching converters; to replace conventional bulky transformers. The proposed circuitry not only reduces the overall size but also provides power flow control with the ability to be interfaced with renewable energy resources (RESs) to fulfill the future grid requirements at consumer end. The proposed solid-state transformer provides bidirectional power flow with variable voltage and frequency operation and has the ability to maintain unity power factor; and total harmonic distortion (THD) of current for any type of load within defined limits of Institute of Electrical and Electronics Engineers (IEEE) standard. Solid state transformer offers much smaller size compared to the conventional iron core transformer. MATLAB/Simulink platform is adopted to test the validity of the proposed circuit for different scenarios by providing the simulation results evaluated at 25 kHz switching frequency.

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

Design of Active Filter Based on the Active Power Balance

2014 ◽  
Vol 596 ◽  
pp. 709-712
Author(s):  
Ling Ji
Keyword(s):  
Single Phase ◽  
Harmonic Distortion ◽  
Active Power ◽  
Active Filter ◽  
Simulation Software ◽  
Point Of View ◽  
Inductive Load ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Functional Point

In order to eliminate harmonics generated by the power electronic devices, from a functional point of view the amount of the balance, the use of filters to supply current and DC voltage is sampled in a controlled manner to achieve harmonic compensation, the establishment of a single-phase active power filter the control system of the model and the theoretical analysis of the program by Saber simulation software has been validated in simulation, based on a prototype developed, according to the single-phase shunt active filter to achieve our scheme can effectively harmonic compensation for pollution caused by the rectifier with inductive load, simulation and experimental results show that this method can be controlled harmonic distortion at 5.8%.

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
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