http://ieeexplore.ieee.org/iel5/5610941/5624686/05624745.pdf

Power electronics

Wide bandgap semiconductors show superior material properties enabling potential power device operation at higher temperatures, voltages, and switching speeds than current Si technology. As a result, a new generation of power devices is being developed for power converter applications in which traditional Si power devices show limited operation. The use of these new power semiconductor devices will allow both an important improvement in the performance of existing power converters and the development of new power converters, accounting for an increase in the efficiency of the electric energy transformations and a more rational use of the electric energy. At present, SiC and GaN are the more promising semiconductor materials for these new power devices as a consequence of their outstanding properties, commercial availability of starting material, and maturity of their technological processes. This paper presents a review of recent progresses in the development of SiC- and GaN-based power semiconductor devices together with an overall view of the state of the art of this new device generation.

A Survey of Wide Bandgap Power Semiconductor Devices

High-frequency-link (HFL) power conversion systems (PCSs) are attracting more and more attentions in academia and industry for high power density, reduced weight, and low noise without compromising efficiency, cost, and reliability. In HFL PCSs, dual-active-bridge (DAB) isolated bidirectional dc-dc converter (IBDC) serves as the core circuit. This paper gives an overview of DAB-IBDC for HFL PCSs. First, the research necessity and development history are introduced. Second, the research subjects about basic characterization, control strategy, soft-switching solution and variant, as well as hardware design and optimization are reviewed and analyzed. On this basis, several typical application schemes of DAB-IBDC for HPL PCSs are presented in a worldwide scope. Finally, design recommendations and future trends are presented. As the core circuit of HFL PCSs, DAB-IBDC has wide prospects. The large-scale practical application of DAB-IBDC for HFL PCSs is expected with the recent advances in solid-state semiconductors, magnetic and capacitive materials, and microelectronic technologies.

Overview of Dual-Active-Bridge Isolated Bidirectional DC–DC Converter for High-Frequency-Link Power-Conversion System

DC–DC converters with voltage boost capability are widely used in a large number of power conversion applications, from fraction-of-volt to tens of thousands of volts at power levels from milliwatts to megawatts. The literature has reported on various voltage-boosting techniques, in which fundamental energy storing elements (inductors and capacitors) and/or transformers in conjunction with switch(es) and diode(s) are utilized in the circuit. These techniques include switched capacitor (charge pump), voltage multiplier, switched inductor/voltage lift, magnetic coupling, and multistage/-level, and each has its own merits and demerits depending on application, in terms of cost, complexity, power density, reliability, and efficiency. To meet the growing demand for such applications, new power converter topologies that use the above voltage-boosting techniques, as well as some active and passive components, are continuously being proposed. The permutations and combinations of the various voltage-boosting techniques with additional components in a circuit allow for numerous new topologies and configurations, which are often confusing and difficult to follow. Therefore, to present a clear picture on the general law and framework of the development of next-generation step-up dc–dc converters, this paper aims to comprehensively review and classify various step-up dc–dc converters based on their characteristics and voltage-boosting techniques. In addition, the advantages and disadvantages of these voltage-boosting techniques and associated converters are discussed in detail. Finally, broad applications of dc–dc converters are presented and summarized with comparative study of different voltage-boosting techniques.

/pdf/step-up-dc-dc-converters-a-comprehensive-review-of-voltage-6dlytctzg2.pdf

Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications

Energy storage systems (ESSs) are enabling technologies for well-established and new applications such as power peak shaving, electric vehicles, integration of renewable energies, etc. This paper presents a review of ESSs for transport and grid applications, covering several aspects as the storage technology, the main applications, and the power converters used to operate some of the energy storage technologies. Special attention is given to the different applications, providing a deep description of the system and addressing the most suitable storage technology. The main objective of this paper is to introduce the subject and to give an updated reference to nonspecialist, academic, and engineers in the field of power electronics.

Energy Storage Systems for Transport and Grid Applications

Harmonic analysis of converter-fed DC systems under unbalanced and harmonic supply voltages

This paper proposes a new method to generate the reference currents of a parallel active power filter used in three-phase four-wire systems. The proposed method (a) synthesizes a three-phase three-wire balanced load that is resistive and time invariant with respect to the source, and (b) can be applied in non-sinusoidal unbalanced three-phase four-wire systems, with or without zero-sequence components in the currents and/or voltages. Furthermore, no coordinate transformation is used to implement it, assuring a simple design. Simulation and experimental results validate the proposed method.

http://ieeexplore.ieee.org/iel5/9847/31031/01453270.pdf

Resistive load synthesis in three-phase four-wire systems using a parallel active power filter

The work presented in This work focuses on the development of a 'proof-of-concept' fuel cell vehicle prototype using a dynamometer-based test bench. The main objective of this work is the validation of design ideas regarding the combination of two different energy storage devices (i.e., batteries and ultracapacitors) into an ESU for the power management of this vehicle. The implemented prototype is a simplified and scale-down version of the designed vehicle; however, the measured results show that the vehicle could greatly benefit from the combination of energy sources that are different in nature such as batteries and ultracapacitors.

Dynamometer-based testing of a proof-of-concept fuel cell vehicle prototype

The analysis of a shoot-through-proof converter topology designed to eliminate the need for a dead time between switching transitions is presented. Shoot-through-proof is done by splitting each leg of a normal converter and inserting an inductor to limit the current during transitions. Matlab/Simulink™ simulations based on a 10-kVA laboratory test setup, which was built to validate the proposed ideas, are used to evaluate the system performance. In particular, simulations were used to predict losses associated with the topology and reduce the harmonics injected by the converter. The control system was implemented in a TMS320F28335 DSP, and the results of both the simulations and prototype testing showed very good agreement.

Juan Carlos Balda

Papers

Harmonic analysis of converter-fed DC systems under unbalanced and harmonic supply voltages

Resistive load synthesis in three-phase four-wire systems using a parallel active power filter

Dynamometer-based testing of a proof-of-concept fuel cell vehicle prototype

Analysis of a Grid-Connected Shoot-Through Current Immune Three-Phase Converter Topoloy under Unbalanced Loading Conditions