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Failure modes and reliability oriented system design for aerospace power electronic converters (2020)
Journal Article
Harikumaran, J., Migliazza, G., Buticchi, G., Madonna, V., Giangrande, P., Costabeber, A., …Galea, M. (2021). Failure modes and reliability oriented system design for aerospace power electronic converters. IEEE Open Journal of the Industrial Electronics Society, 2, 53-64. https://doi.org/10.1109/OJIES.2020.3047201

Aircraft electrification has been a major trend in aviation industry for past 20 years. Given the increasing electrical power requirement for future more electric aircraft and hybrid electric aircraft, research efforts has been ongoing in high power... Read More about Failure modes and reliability oriented system design for aerospace power electronic converters.

Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear (2020)
Journal Article
Akcay, Y., Cox, T., Costabeber, A., & Sala, G. (2020). Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear. IEEE Transactions on Industry Applications, 56(3), 2752-2761. https://doi.org/10.1109/TIA.2020.2970861

Magnetic gearboxes are becoming more attractive in gearing areas because of their high torque density and high efficiency. In this article, we proposed a 2-D analytical model in a coaxial magnetic gearbox by considering design aspects that can make t... Read More about Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear.

Series Chain-link Modular Multilevel AC/DC Converter (SCC) for HVDC Applications (2019)
Journal Article
Tardelli, F., Costabeber, A., Trainer, D., & Clare, J. (2020). Series Chain-link Modular Multilevel AC/DC Converter (SCC) for HVDC Applications. IEEE Transactions on Power Electronics, 35(6), 5714-5728. https://doi.org/10.1109/tpel.2019.2952194

Introduction of the Modular Multilevel Converter (MMC) has enabled the exploitation of Voltage Source Converters (VSCs) in an increasing number of High Voltage Direct Current (HVdc) applications. Subsequently, some new topologies and solutions have b... Read More about Series Chain-link Modular Multilevel AC/DC Converter (SCC) for HVDC Applications.

A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors (2019)
Journal Article
Li, Z., Wheeler, P., Watson, A., Costabeber, A., Wang, B., Ren, Y., …Ma, H. (2020). A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors. IEEE Transactions on Power Electronics, 35(5), 5267-5278. https://doi.org/10.1109/tpel.2019.2946692

© 1986-2012 IEEE. This article considers fault detection in the case of a three-phase three-wire (3P3W) inverter, when only two current sensors are used to save cost or due to a faulty current sensor. With two current sensors, there is no current met... Read More about A Fast Diagnosis Method for Both IGBT Faults and Current Sensor Faults in Grid-Tied Three-Phase Inverters With Two Current Sensors.

Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids (2019)
Journal Article
Burgos-Mellado, C., Llanos, J., Cardenas, R., Saez, D., Olivares, D. E., Sumner, M., & Costabeber, A. (2020). Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids. IEEE Transactions on Smart Grid, 11(2), 1604 -1619. https://doi.org/10.1109/tsg.2019.2941117

A distributed control system is proposed which uses the Conservative Power Theory (CPT) and a consensus algorithm to share imbalance and harmonics between different converters in three-phase four-wire droop-controlled Microgrids (MGs). The CPT is use... Read More about Distributed Control Strategy Based on a Consensus Algorithm and on the Conservative Power Theory for Imbalance and Harmonic Sharing in 4-Wire Microgrids.

Control and Experimental Validation of the Series Bridge Modular Multilevel Converter for HVDC Applications (2019)
Journal Article
Martinez Diez, C., Costabeber, A., Tardelli, F., Trainer, D., & Clare, J. (2019). Control and Experimental Validation of the Series Bridge Modular Multilevel Converter for HVDC Applications. IEEE Transactions on Power Electronics, 35(3), 2389-2401. https://doi.org/10.1109/tpel.2019.2929862

© 1986-2012 IEEE. The series bridge converter (SBC) is a modular multilevel converter (MMC) recently developed to enhance power density in high-voltage high-power applications. The MMC is a well-established solution, widely researched, and exploited... Read More about Control and Experimental Validation of the Series Bridge Modular Multilevel Converter for HVDC Applications.

A Unidirectional Insulated AC-DC Converter Based on the Hexverter and Multipulse-Rectifier (2019)
Journal Article
Lambert, G., Costabeber, A., Wheeler, P., & De Novaes, Y. R. (2020). A Unidirectional Insulated AC-DC Converter Based on the Hexverter and Multipulse-Rectifier. IEEE Transactions on Power Electronics, 35(3), 2363-2371. https://doi.org/10.1109/tpel.2019.2928555

This paper proposes an insulated two-stage ac-dc converter to be applied in unidirectional power flow systems. The two-stage structure is the combination of a Hexverter and a series-type 12 pulse rectifier. The key features of the proposed structure... Read More about A Unidirectional Insulated AC-DC Converter Based on the Hexverter and Multipulse-Rectifier.

Model predictive control for isolated DC/DC converters with fast dynamic stabilization in DC microgrids (2019)
Conference Proceeding
Chen, L., Zanchetta, P., Tarisciotti, L., Wheeler, P., Costabebber, A., & Dragi?evi?, T. (2019). Model predictive control for isolated DC/DC converters with fast dynamic stabilization in DC microgrids

The proposed control for DC/DC converters with high frequency isolation, on one hand, provides fast stabilization to the DC microgrids without introducing additional passive components. On the other hand, it can improve load transition performance. A... Read More about Model predictive control for isolated DC/DC converters with fast dynamic stabilization in DC microgrids.

A three-phase modular isolated matrix converter (2019)
Journal Article
Nasir, U., Costabeber, A., Rivera, M., Wheeler, P., & Clare, J. (2019). A three-phase modular isolated matrix converter. IEEE Transactions on Power Electronics, 34(12), 11760-11773. https://doi.org/10.1109/TPEL.2019.2909681

This paper discusses the analysis, design and experimental validation of a Modular Isolated Matrix Converter (MIMC), including modulation, commutation and control. The MIMC topology is a single-stage high power density AC/AC converter which is attrac... Read More about A three-phase modular isolated matrix converter.

Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids (2019)
Journal Article
Burgos-Mellado, C., Costabeber, A., Sumner, M., Cárdenas-Dobson, R., & Sáez, D. (2019). Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids. Energies, 12(7), 1227. https://doi.org/10.3390/en12071227

This paper proposes a low-complexity small signal model for a 3-leg converter connected to a balanced three-phase, three-wire weak grid and synchronised to this grid using a PLL implemented in a synchronous rotating d-q axis. A thorough analysis of t... Read More about Small-Signal Modelling and Stability Assessment of Phase-Locked Loops in Weak Grids.

Current-Fed Isolated DC/DC Converter for Future Aerospace Microgrids (2018)
Journal Article
Tarisciotti, L., Costabeber, A., Chen, L., Walker, A., & Galea, M. (2019). Current-Fed Isolated DC/DC Converter for Future Aerospace Microgrids. IEEE Transactions on Industry Applications, 55(3), 2823-2832. https://doi.org/10.1109/tia.2018.2889845

High-performance power conversion equipment is currently gaining an increasing interest for aircraft applications. In particular, isolated bidirectional dc/dc converters are often proposed for modern aircraft distribution systems. A current-fed isola... Read More about Current-Fed Isolated DC/DC Converter for Future Aerospace Microgrids.

Phase-shift-modulation for a current-fed isolated DC-DC converter in more electric aircraft (2018)
Journal Article
Chen, L., Tarisciotti, L., Costabeber, A., Guan, Q., Wheeler, P., & Zanchetta, P. (2019). Phase-shift-modulation for a current-fed isolated DC-DC converter in more electric aircraft. IEEE Transactions on Power Electronics, 34(9), 8528-8543. https://doi.org/10.1109/tpel.2018.2889861

A Phase-Shift-Modulation (PSM) technique is proposed for an Active-Bridge-Active-Clamp (ABAC) topology. This topology is aimed for high power more-electric-aircraft applications. The proposed PSM has a complete switching harmonics cancellation on the... Read More about Phase-shift-modulation for a current-fed isolated DC-DC converter in more electric aircraft.

Model Predictive Control for Isolated DC/DC Power Converters with Transformer Peak Current Shaving (2018)
Conference Proceeding
Chen, L., Tarisciotti, L., Costabeber, A., Wheeler, P., & Zanchetta, P. (2018). Model Predictive Control for Isolated DC/DC Power Converters with Transformer Peak Current Shaving. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (5954-5960). https://doi.org/10.1109/ECCE.2018.8558301

In this paper a Model Predictive Control, suitable for isolated DC/DC power converters and featuring optimization on converter operations, is proposed. The control is designed based on a specific a current-fed DC/DC converter topology, named Active-B... Read More about Model Predictive Control for Isolated DC/DC Power Converters with Transformer Peak Current Shaving.

Experimental validation of harmonic impedance measurement and LTP Nyquist criterion for stability analysis in power converter networks (2018)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., Tardelli, F., & Zanchetta, P. (2019). Experimental validation of harmonic impedance measurement and LTP Nyquist criterion for stability analysis in power converter networks. IEEE Transactions on Power Electronics, 34(8), 7972-7982. https://doi.org/10.1109/tpel.2018.2880935

This paper presents the first experimental validation of the stability analysis based on the online measurement of harmonic impedances exploiting the Linear Time Periodic (LTP) approach, applied to AC networks of power converters. Previous publicatio... Read More about Experimental validation of harmonic impedance measurement and LTP Nyquist criterion for stability analysis in power converter networks.

Analysis of Low-Frequency-Oscillations in Single-Phase AC Systems by LTP Theory (2018)
Conference Proceeding
Salis, V., Costabeber, A., Zanchetta, P., & Cox, S. (2018). Analysis of Low-Frequency-Oscillations in Single-Phase AC Systems by LTP Theory. In 2018 20th European Conference on Power Electronics and Applications (EPE'18 ECCE Europe)

The paper presents the analysis of a single-phase active rectifier, with DC constant power load, affected by Low-Frequency Oscillation (LFO) behaviour. Conventional LTI analysis tools might fail to reveal the LFO phenomenon, whereas the LTP (Linear T... Read More about Analysis of Low-Frequency-Oscillations in Single-Phase AC Systems by LTP Theory.

A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems (2018)
Journal Article
Burgos-Mellado, C., Cardenas-Dobson, R., Saez, D., Costabeber, A., & Sumner, M. (2019). A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems. IEEE Transactions on Power Electronics, 34(6), 5325-5339. https://doi.org/10.1109/tpel.2018.2869866

© 1986-2012 IEEE. A cooperative control scheme based on the conservative power theory (CPT) is proposed, which can share imbalances in three-phase four-wire droop-controlled systems. By utilizing the CPT, the balanced, unbalanced, and distorted compo... Read More about A Control Algorithm Based on the Conservative Power Theory for Cooperative Sharing of Imbalances in 4-Wire Systems.

A Unidirectional Flying Chain-link Modular Multilevel Rectifier (FCL-MMR) with Reduced Energy Storage for Offshore Wind Integration (2018)
Conference Proceeding
Tardelli, F., Costabeber, A., Jankovic, M., Clare, J., & Zanchetta, P. (2018). A Unidirectional Flying Chain-link Modular Multilevel Rectifier (FCL-MMR) with Reduced Energy Storage for Offshore Wind Integration. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (2931-2937). https://doi.org/10.1109/ECCE.2018.8558413

© 2018 IEEE. In recent years, the Modular Multilevel Converter (MMC) has been widely recognised as the state-of-art for AC/DC conversion stages in the integration of offshore wind energy through HVDC links. The MMC guarantees high power quality, effi... Read More about A Unidirectional Flying Chain-link Modular Multilevel Rectifier (FCL-MMR) with Reduced Energy Storage for Offshore Wind Integration.

Advanced modulations for a current-fed isolated DC-DC converter with wide voltage operating ranges (2018)
Journal Article
Chen, L., Tarisciotti, L., Costabeber, A., Gao, F., Wheeler, P., & Zanchetta, P. (2019). Advanced modulations for a current-fed isolated DC-DC converter with wide voltage operating ranges. IEEE Journal of Emerging and Selected Topics in Power Electronics, 7(4), 2540-2552. https://doi.org/10.1109/jestpe.2018.2870827

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... Read More about Advanced modulations for a current-fed isolated DC-DC converter with wide voltage operating ranges.

Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines (2018)
Journal Article
Galassini, A., Costabeber, A., Degano, M., Gerada, C., Tessarolo, A., & Menis, R. (2019). Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines. IEEE Transactions on Industrial Electronics, 66(7), 5600-5610. https://doi.org/10.1109/tie.2018.2868029

This paper presents a droop-based dis- tributed control strategy for multi-three-phase machines that provides augmented controllability during power shar- ing transients. The proposed strategy is able to mitigate the mutual interactions among differe... Read More about Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines.

Single Stage Dual Active Bridge AC-DC Converter with Active Power Decoupling (2018)
Conference Proceeding
Gottardo, D., De Lillo, L., Empringham, L., Costabeber, A., & Chen, L. (2018). Single Stage Dual Active Bridge AC-DC Converter with Active Power Decoupling. In SPEEDAM 2018 - Proceedings: International Symposium on Power Electronics, Electrical Drives, Automation and Motion (497-501). https://doi.org/10.1109/SPEEDAM.2018.8445410

The paper introduces a new a isolated DC-AC DAB converter topology, capable of active power decoupling on the AC side of the transformer, made up of two full bridges with no additional active component. The differential voltage modulated by the DC-si... Read More about Single Stage Dual Active Bridge AC-DC Converter with Active Power Decoupling.