Design and Analysis of a 75 kVA High-Frequency-Link Based Three-Port Power Electronic Transformer

2021 ◽  
Author(s):  
Minjiang Xiang ◽  
Yang Liu ◽  
Haoyu Wang ◽  
Wei Li ◽  
Shancheng Su ◽  
...  
Keyword(s):  
High Frequency ◽  
Power Electronic ◽  
Electronic Transformer ◽  
Power Electronic Transformer

scholarly journals DAB Based DC-DC High Frequency Link PET for Interconnecting MVDC-LVDC Grids

2021 ◽  
Vol 7 (05) ◽  
pp. 165-171
Author(s):  
D.Srinivasa Rao & Dr. Anupama A. Deshpande
Keyword(s):  
High Frequency ◽  
Low Voltage ◽  
Short Circuit ◽  
Power Electronic ◽  
Distribution Grid ◽  
Medium Voltage ◽  
Electronic Transformer ◽  
Power Electronic Transformer ◽  
Wide Range ◽  
Medium Voltage Dc

This paper proposes dual active bridge (DAB) based high frequency power electronic transformer (PET) for interconnecting medium voltage dc (MVDC) and low voltage dc (LVDC) grids for dc power distribution. The above proposed concept works on dual active phase shift principle and square wave HF modulation technique for bidirectional power transfer. Compared to the traditional dc transformer scheme, The proposed power electronic transformer (PET) can disconnect from LVDC distribution grid effectively as a dc breaker when a short circuit fault occurs in the distribution grid. The isolated DC-DC PET topology with a wide range of voltage conversion ratio is useful for High Voltage DC tapping. The DAB based on switched capacitor is connected to the medium voltage DC side and acts as an inverter. The proposed topology has the ability to transfer higher power, and lower circulating power, lower high frequency link voltage, and RMS current and peak values with the same transmission power in the MVDC side. This paper analyzes the topology, voltage and power characterization, control strategy in detail. Increase in the intermediate AC frequency will reduce the size of the transformer and other passive elements significantly in the circuit. The theoretical analysis is supported by MATLAB simulation.

scholarly journals Power electronic transformer based on cascaded H-bridge converter

2017 ◽  
Vol 65 (5) ◽  
pp. 675-683 ◽  
Author(s):  
M. Morawiec ◽  
A. Lewicki
Keyword(s):  
Control Strategy ◽  
High Frequency ◽  
Reactive Power ◽  
Low Voltage ◽  
Electrical Power ◽  
Power Electronic ◽  
Electronic Transformer ◽  
Power Electronic Transformer ◽  
Active And Reactive Power ◽  
Theoretical Issues

Abstract In this paper the control strategy of power electronic transformer (PET) is proposed. The analyzed structure of PET uses two seven-level cascaded H-bridge (CHB) rectifiers. The electrical power of PET is transferred between DC-links of CHB converters using dual-active-bridges (DABs) and low voltage high frequency transformers. The roposed solution allows for controlling the active and reactive power with a low level of harmonic distortions. The DC-link voltages and the load of the utilized H-bridges are controlled using appropriate modulation strategy. The theoretical issues are confirmed by simulation and experimental results.

scholarly journals Transformer Model in Wide Frequency Bandwidth for Power Electronics Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Carlos Gonzalez-Garcia ◽  
Jorge Pleite
Keyword(s):  
Power Electronics ◽  
High Frequency ◽  
Smart Grids ◽  
Power Transformer ◽  
Wide Frequency Range ◽  
Power Electronic ◽  
Electrical Parameters ◽  
Electronic Transformer ◽  
Power Electronic Transformer ◽  
Transformer Model

The development of the smart grids leads to new challenges on the power electronics equipment and power transformers. The use of power electronic transformer presents several advantages, but new problems related with the application of high frequency voltage and current components come across. Thus, an accurate knowledge of the transformer behavior in a wide frequency range is mandatory. A novel modeling procedure to relate the transformer physical behavior and its frequency response by means of electrical parameters is presented. Its usability is demonstrated by an example where a power transformer is used as filter and voltage reducer in an AC-DC-AC converter.

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