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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.

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.

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.

A Leakage-Inductance-Tolerant Commutation Strategy for Isolated AC/AC Converters (2018)
Journal Article
Nasir, U., Costabeber, A., Rivera, M., Wheeler, P., & Clare, J. (2019). A Leakage-Inductance-Tolerant Commutation Strategy for Isolated AC/AC Converters. IEEE Journal of Emerging and Selected Topics in Power Electronics, 7(1), 467-479. https://doi.org/10.1109/jestpe.2018.2861326

© 2013 IEEE. This paper proposes a generalized commutation strategy suitable for matrix-based isolated ac/ac conversion stages in solid-state transformers for use whenever there is nonnegligible leakage inductance in the isolation transformer. The st... Read More about A Leakage-Inductance-Tolerant Commutation Strategy for Isolated AC/AC Converters.

An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids (2018)
Journal Article
Jayamaha, P. C., Costabeber, A., Williams, A., & Sumner, M. (2018). An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids. International Journal of Electrical Power and Energy Systems, 103, https://doi.org/10.1016/j.ijepes.2018.05.023

This paper proposes the use of Energy Storage (ES) to support frequency fluctuations in weak grids powered by low-power synchronous generators (SGs). Traditionally, large synchronous generators rely on high inertia and governor control to guarantee t... Read More about An independently controlled energy storage to support short term frequency fluctuations in weak electrical grids.

MMC front-end for klystron modulators: an augmented modulation scheme for arm balancing (2018)
Journal Article
Jankovic, M., Costabeber, A., Watson, A. J., Clare, J. C., & Aguglia, D. (2018). MMC front-end for klystron modulators: an augmented modulation scheme for arm balancing. IEEE Transactions on Plasma Science, 46(10), 3325-3333. https://doi.org/10.1109/TPS.2018.2837619

This paper discusses the control of a Modular Multilevel Converter (MMC) used as a grid-interface for the klystron modulators in the Compact Linear Collider (CLIC). The converter has a DC side load which takes short-duration power pulses, causing hig... Read More about MMC front-end for klystron modulators: an augmented modulation scheme for arm balancing.

Harmonic reduction methods for electrical generation: a review (2018)
Journal Article
Fallows, D., Nuzzo, S., Costabeber, A., & Galea, M. (in press). Harmonic reduction methods for electrical generation: a review. IET Generation, Transmission and Distribution, https://doi.org/10.1049/iet-gtd.2018.0008

This paper provides a comprehensive literature review of techniques for harmonic related power quality improvement of electrical generation systems. An increasing interest in these aspects is due to the ever more stringent power quality... Read More about Harmonic reduction methods for electrical generation: a review.

Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter (2018)
Conference Proceeding
Chen, L., Tarisciotti, L., Costabeber, A., Gottardo, D., Zanchetta, P., & Wheeler, P. (2018). Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter.

The Dual-Active-Bridge is a well-established isolated, bidirectional DC/DC topology suitable for applications where high efficiency, galvanic isolation and large voltage conversion ratios are required. However, in low voltage high power cases, the ou... Read More about Model predictive control for Active-Bridge-Active-Clamp (ABAC) converter.

Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models (2018)
Journal Article
Salis, V., Costabeber, A., Cox, S. M., Formentini, A., & Zanchetta, P. (2018). Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models. IEEE Journal of Emerging and Selected Topics in Power Electronics, 6(4), 2147-2158. https://doi.org/10.1109/JESTPE.2018.2810282

In recent years, a considerable effort has been made to minimise the size of DC-link capacitors in single-phase activefront-ends (SP-AFE), to reduce cost and to increase power density. As a result of the lower energy storage, a high-bandwidth outer D... Read More about Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models.

Learning position controls for hybrid step motors: from current-fed to full-order models (2018)
Journal Article
Salis, V., Chiappinelli, N., Costabeber, A., Zanchetta, P., Bifaretti, S., Tomei, P., & Verrelli, C. M. (2018). Learning position controls for hybrid step motors: from current-fed to full-order models. IEEE Transactions on Industrial Electronics, 65(8), 6120-6130. https://doi.org/10.1109/TIE.2018.2793183

The experimental comparison of two different global learning position controls (namely, ‘adaptive learning’ and ‘repetitive learning’ controls) for hybrid step motors performing repetitive tasks has been recently presented in the literature. Related... Read More about Learning position controls for hybrid step motors: from current-fed to full-order models.