Phase-Shift Modulation for a Current-Fed Isolated DC–DC Converter in More Electric Aircrafts

Chen, Linglin; Tarisciotti, Luca; Costabeber, Alessandro; Guan, Quanxue; Wheeler, Patrick; Zanchetta, Pericle

doi:10.1109/tpel.2018.2889861

“…In the next control interval k+1 to k+2, the same process is repeated, and the DCS moves to {a, a+Δf, a+2Δf}. The DCS is moving with the working point in the domain as (9). In this control interval, value a+2Δf results in the smallest cost function (ct), therefore, this value is applied at the time instance k+2.…”

Section: A the Operating Principlementioning

confidence: 99%

“…Therefore, dedicated Energy Storage Systems (ESS) have been usually integrated to coexist with PPLs in the micro-grids through the interface of Dual-Active-Bridge (DAB) converters [6]. Admittedly, DAB topology and its relevant derivatives [9], [10] have drawn considerable attention in the application of DC micro-grids for their salient merits in high frequency galvanic isolation, high voltage step up/down ability and high power conversion efficiency [11]. Apart from that, dynamic performance of the interface converters is also instrumental for powering the PPLs, and this is largely dependent on the control algorithm applied to the interface converters.…”

mentioning

confidence: 99%

Model Predictive Control for Dual-Active-Bridge Converters Supplying Pulsed Power Loads in Naval DC Micro-Grids

Chen

¹

,

Shao

²

,

Xiao

³

et al. 2020

IEEE Trans. Power Electron.

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Pulsed-Power-Loads (PPLs) are becoming prevalent in medium-voltage naval DC micro-grids. To alleviate their effects on the system, energy storages are commonly installed. For optimal performance, their interface converters need to have fast dynamics and excellent disturbance rejection capability. Moreover, these converters often need to have voltage transformation and galvanic isolation capability since common energy storage technologies like batteries and super-caps are typically assembled with low voltage strings. In order to address these issues, a Moving-Discretized-Control-Set Model-Predictive-Control (MDCS-MPC) is proposed in this paper and applied on a Dual-Active-Bridge converter. Fixed switching frequency is maintained, enabling easy passive components design. The proposed MDCS-MPC has a reduced prediction horizon, which allows low computational burden. The operating principle of the MDCS-MPC is introduced in development of a cost function that provides stiff voltage regulation. Resonance damping and sampling noise resistance can also be achieved with the proposed cost function. An adaptive step is introduced to enable fast transition. Assessments on the performance of the proposed MDCS-MPC are conducted. Comparisons with other control methods are also provided. Experimental validations on a 300V/300V 20kHz 1kW Dual-Active-Bridge converter are carried out to verify the theoretical claims.

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“…In the next control interval k+1 to k+2, the same process is repeated, and the DCS moves to {a, a+Δf, a+2Δf}. The DCS is moving with the working point within the domain of (9). In this control interval, value a+2Δf results in the smallest cost function (ct), therefore, this value is applied at the time instance k+2.…”

Section: A the Operating Principlementioning

confidence: 99%

Model Predictive Control for Dual Active Bridge in Naval DC Microgrids Supplying Pulsed Power Loads Featuring Fast Transition and Online Transformer Current Minimization

Xiao

¹

,

Chen

²

,

Jia

³

et al. 2020

IEEE Trans. Ind. Electron.

Self Cite

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Pulsed-Power-Loads (PPLs) are becoming prevalent in medium-voltage naval DC micro-grids. To alleviate their effects on the system, energy storages are commonly installed. For optimal performance, their interface converters need to have fast dynamics and excellent disturbance rejection capability. Moreover, these converters often need to have voltage transformation and galvanic isolation capability since common energy storage technologies like batteries and super-caps are typically assembled with low voltage strings. In order to address these issues, a Moving-Discretized-Control-Set Model-Predictive-Control (MDCS-MPC) is proposed in this paper and applied on a Dual-Active-Bridge converter. Fixed switching frequency is maintained, enabling easy passive components design. The proposed MDCS-MPC has a reduced prediction horizon, which allows low computational burden. The operating principle of the MDCS-MPC is introduced in development of a cost function that provides stiff voltage regulation. Resonance damping and sampling noise resistance can also be achieved with the proposed cost function. An adaptive step is introduced to enable fast transition. Assessments on the performance of the proposed MDCS-MPC are conducted. Comparisons with other control methods are also provided. Experimental validations on a 300V/300V 20kHz 1kW Dual-Active-Bridge converter are carried out to verify the theoretical claims.

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“…In this context, low-voltage/low-power DC loads, as for instance LED lighting, ICT equipment, USB(-C) chargers are powered directly from the DC grid bus and no longer from the conventional AC grid. Other applications where DC systems are being considered are listed: electric vehicles [3], [4], electric aircrafts [5], DC microgrids applying Building Integrated Photovoltaics (BIPV) [6], Battery Energy Storage System (BESS) [7], Fuel Cell (FC) [8] and datacenters [9]. For such implementations, a DC conversion to adapt the DC voltage levels is required, therefore, DC-DC converters with high step-down (HSD) conversion capability are standing out for such applications.…”

Section: Introductionmentioning

confidence: 99%

A Family of DC–DC Converters With High Step-Down Voltage Capability Based on the Valley-Fill Switched Capacitor Principle

Vecchia

¹

,

Broeck

²

,

Ravyts

³

et al. 2021

IEEE Trans. Ind. Electron.

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In this paper, a family of interleaved high-stepdown (I-HSD) DC-DC converters is proposed integrating the Valley-Fill switched capacitor structure and a double series capacitor Buck converter. This integration generates three converters, which will be extensively explored herein via theoretical and experimental analysis. A complete theoretical analysis of the structures is presented in order to mathematically explain the physical operation of the proposed topologies. A design procedure is presented for the following specifications: 300 V/12 V input to output voltage, 100 W of power and a switching frequency of 100 kHz and the results obtained are compared to state-of-theart DC-DC converters that enable similar high step-down operation.

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Phase-Shift Modulation for a Current-Fed Isolated DC–DC Converter in More Electric Aircrafts

Cited by 28 publications

References 31 publications

Model Predictive Control for Dual-Active-Bridge Converters Supplying Pulsed Power Loads in Naval DC Micro-Grids

Model Predictive Control for Dual-Active-Bridge Converters Supplying Pulsed Power Loads in Naval DC Micro-Grids

Model Predictive Control for Dual Active Bridge in Naval DC Microgrids Supplying Pulsed Power Loads Featuring Fast Transition and Online Transformer Current Minimization

A Family of DC–DC Converters With High Step-Down Voltage Capability Based on the Valley-Fill Switched Capacitor Principle

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