Evaluation of isolated DC/DC converter topologies for future HVDC aerospace microgrids

Tarisciotti, Luca; Costabeber, Alessandro; Chen, Linglin; Walker, Adam; Galea, Michael

doi:10.1109/ecce.2017.8096437

Cited by 26 publications

(21 citation statements)

References 44 publications

(36 reference statements)

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“…In fact, the minimum allowed voltage is 108Vac, for distribution system at 115Vac, instead 250Vdc are accepted on 270Vdc systems (as per MIL-STD-704F) [100]. For these reasons, high voltage DC (HVDC) distribution systems at 270Vdc and 540Vdc are under investigation [101,104]. Regarding the HVDC systems, the most obvious concerns are safety and the increased risk of electrical system failures, caused by the low pressure phenomenon, such as corona effects and insulation breakdown.…”

Section: A Multi-spool Generation and Hvdc Systemsmentioning

confidence: 99%

Electrical Power Generation in Aircraft: Review, Challenges, and Opportunities

Madonna

Giangrande

Galea

2018

IEEE Trans. Transp. Electrific.

433

194

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Abstract-The constant growth of air traffic, the demand for performance optimization and the need for decreasing both operating and maintenance costs have encouraged the aircraft industry to move towards more electric solutions. As a result of this trend, electric power required on board of aircraft has significantly increased through the years, causing major changes in electric power system architectures. Considering this scenario, the paper gives a review about the evolution of electric power generation systems in aircraft. The major achievements are highlighted and the rationale behind some significant developments discussed. After a brief historical overview of the early DC generators (both wind-and engine-driven), the reasons which brought the definitive passage to the AC generation, for larger aircraft, are presented and explained. Several AC generation systems are investigated with particular attention being focused on the voltage levels and the generator technology. Further, examples of commercial aircraft implementing AC generation systems are provided. Finally, the trends towards modern generation systems are also considered giving prominence to their challenges and feasibility.

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Section: A Multi-spool Generation and Hvdc Systemsmentioning

confidence: 99%

Electrical Power Generation in Aircraft: Review, Challenges, and Opportunities

Madonna

Giangrande

Galea

2018

IEEE Trans. Transp. Electrific.

433

194

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“…However, lower clamp capacitor values may impact the system controllability and the output current interleaving. Single Phase Shift modulation (SPS) [20] can be directly applied to the ABAC converter. Using this modulation, 50% duty cycle waveforms are generated on each side of the transformer while power transfer is controlled by the phase shift angle φ.…”

Section: Basic Operationmentioning

confidence: 99%

“…The main drawback of this topology is that bidirectional power flow is also not achievable. The Active-Bridge-Active-Clamp (ABAC) converter was first proposed in [20], replacing diodes in the semi-DAB [16] with semiconductor switches and adopting a standard single secondary transformer structure. However, when high power applications are considered, the high current on the LV side requires paralleling of semiconductor devices.…”

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confidence: 99%

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Advanced Modulations for a Current-Fed Isolated DC–DC Converter With Wide-Voltage-Operating Ranges

Chen

Tarisciotti

Costabeber

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

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An Active-Bridge-Active-Clamp (ABAC) topology with its associated switching patterns and modulation techniques is introduced in this paper. The topology has been designed to comply with stringent power quality requirements in a More Electric Aircraft (MEA) application. The dual transformer secondary structure of the ABAC allows the definition of a particular phase shift based switching pattern. The proposed switching pattern ensures not only the output current switching harmonics elimination but also even power sharing between the secondary half bridges. Consequently, passives on the low voltage side of the converter are minimized and transformer DC bias is eliminated. All these features can be achieved independently from the operating point of the converter. In this paper, the basic operation of the ABAC converter is first introduced. Theoretical analysis of switching harmonics elimination and power sharing is then carried out in the development of the proposed switching patterns. The theoretical claims are validated by both simulation and experimental results on a 10kW 270V/28V ABAC converter. Index Terms-Isolated DC-DC converter, Current-Fed Dual Active Bridge (CF-DAB), Active-Bridge-Active-Clamp (ABAC) converter. I. INTRODUCTION DC power systems are becoming increasingly important in automotive [1] and aerospace [2], [3] applications where DC buses of different voltage levels usually co-exist. Since active sources can be embedded on those DC buses, these applications demand highly compact, light weighted, and efficient bidirectional DC-DC power converters, often with galvanic isolation. Amongst all isolated and bidirectional DC-DC converter topologies [4], [5], the Dual Active Bridge (DAB) is often the preferred choice, due to its high efficiency and low volume [6]. However, when power is transferred between High-Voltage (HV) and Low-Voltage (LV) DC buses, DAB converters present high LV side current ripple. Therefore, large LV side DC capacitors [7] and extra passive filters are usually adopted [8] to suppress voltage ripple and prevent harmonics from propagating into the LV side DC networks. Current harmonics may also cause voltage resonances in presence of long power cables [9].As an alternative, Current-fed DC-DC converters, broadly used in fuel cells and batteries interface, may be also considered for aerospace applications. Their main advantage, with respect to standard voltage fed DC/DC converters, resides in their ability to provide smooth current with low ripple on the LV side inductors [10]. Several Current-fed DC-DC topologies may be considered

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“…This allows the arrival of new, high-performance power converters with reduced size that are capable of achieving very high quality output voltages and currents. These characteristics represent great advantages for many industries like aeronautics [17,18]. Nonetheless, they represent an important challenge for any control platform that would need to perform the required calculations in a much shorter period of time [19,20].…”

Section: Introductionmentioning

confidence: 99%

Efficient FPSoC Prototyping of FCS-MPC for Three-Phase Voltage Source Inverters

et al. 2020

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This work describes an efficient implementation in terms of computation time and resource usage in a Field-Programmable System-On-Chip (FPSoC) of a Finite Control Set Model Predictive Control (FCS-MPC) algorithm. As an example, the FCS-MPC implementation is used for the current reference tracking of a two-level three-phase power converter. The proposed solution is an enabler for using both complex control algorithms and digital controllers for high switching frequency semiconductor technologies. An original HW/SW (hardware and software) system architecture for an FPSoC is designed to take advantage of a modern operating system, while removing time uncertainty in real-time software tasks, and exploiting dedicated FPGA fabric for the most complex computations. In addition, two different architectures for the FPGA-implemented functionality are proposed and compared in order to study the area-speed trade-off. Experimental results show the feasibility of the proposed implementation, which achieves a speed hundreds of times faster than the conventional Digital Signal Processor (DSP)-based control platform.Keywords: field-programmable gate array (FPGA); field-programmable system-on-chip (FPSoC); finite control set (FCS); model predictive control (MPC); voltage source inverter (VSI)

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Evaluation of isolated DC/DC converter topologies for future HVDC aerospace microgrids

Cited by 26 publications

References 44 publications

Electrical Power Generation in Aircraft: Review, Challenges, and Opportunities

Electrical Power Generation in Aircraft: Review, Challenges, and Opportunities

Advanced Modulations for a Current-Fed Isolated DC–DC Converter With Wide-Voltage-Operating Ranges

Efficient FPSoC Prototyping of FCS-MPC for Three-Phase Voltage Source Inverters

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