Research Repository

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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. (2018). Phase-shift-modulation for a current-fed isolated DC-DC converter in more electric aircraft. IEEE Transactions on Power Electronics, doi: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

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

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)doi: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

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. (2018). 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, 1-1. doi: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

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. (2018). Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines. IEEE Transactions on Industrial Electronics, doi: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

A Leakage-inductance-tolerant commutation strategy for isolated AC/AC converters (2018)
Journal Article
Nasir, U., Costabeber, A., Rivera, M., Wheeler, P., & Clare, J. (2018). A Leakage-inductance-tolerant commutation strategy for isolated AC/AC converters. IEEE Journal of Emerging and Selected Topics in Power Electronics, doi:10.1109/JESTPE.2018.2861326

This paper proposes a generalised 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 standard 4-step... Read More

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. doi: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

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, doi:10.1016/j.ijepes.2018.05.023. ISSN 0142-0615

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

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 ). doi:10.1109/TPS.2018.2837619. ISSN 0093-3813

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

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, doi:10.1049/iet-gtd.2018.0008. ISSN 1751-8687

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

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

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), doi:10.1109/TIE.2018.2793183. ISSN 0278-0046

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

ESBC: an enhanced modular multilevel converter with H-bridge front end (2017)
Conference Proceeding
Amankwah, E., Costabeber, A., Jasim, O., Trainer, D., & Clare, J. C. (2017). ESBC: an enhanced modular multilevel converter with H-bridge front end

This paper presents the Enhanced Series Bridge Converter (ESBC), a hybrid modular multilevel converter with H-bridge front end suitable for high power grid applications. It retains the advantages of other modular multilevel topologies while offering... Read More

Evaluation of isolated DCDC converter topologies for future HVDC aerospace microgrids (2017)
Conference Proceeding
Tarisciotti, L., Costabeber, A., Linglin, C., Walker, A., & Galea, M. (2017). Evaluation of isolated DCDC converter topologies for future HVDC aerospace microgrids. In ECCE 2017: IEEE Conversion Congress & Expodoi:10.1109/ECCE.2017.8096437

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 HVDC aircraft distribution systems. For such reaso... Read More