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An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range (2023)
Journal Article
Chen, Q., Klumpner, C., & Ahmed, M. R. (2023). An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range. IEEE Transactions on Industrial Electronics, https://doi.org/10.1109/tie.2023.3314856

DC–DC converters using soft switching technology have gained popularity in several industrial applications. Nevertheless, a wider soft switching range and a simpler structure are the holy grail for these converters. In this article, an innovative unb... Read More about An Unbalanced Capacitor Voltage Buck Converter With Wide Soft Switching Range.

An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems (2023)
Conference Proceeding
Walmsley, R., Ahmed, R., Klumpner, C., & Saleh, B. M. (2023). An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems. In 2023 IEEE International Electric Machines & Drives Conference (IEMDC). https://doi.org/10.1109/iemdc55163.2023.10238919

The requirement for reductions in CO 2 , NO X and noise emissions from aviation have come under great assiduity. The use of electric and hybrid-electric propulsion systems within aircraft offer potential performance and efficiency improvements, throu... Read More about An Optimisation Tool for Hybrid-Electric Aircraft Propulsion Systems.

Sliding Mode Input Current Control of the Synchronous DC-DC Buck Converter for Electro-Mechanical Actuator Emulation in More Electric Aircrafts (2022)
Journal Article
Salimi, M., Klumpner, C., & Bozhko, S. (2022). Sliding Mode Input Current Control of the Synchronous DC-DC Buck Converter for Electro-Mechanical Actuator Emulation in More Electric Aircrafts. Energies, 15(24), Article 9628. https://doi.org/10.3390/en15249628

The main challenges of the input current control in synchronous DC-DC buck converters are the nonlinear model of the system, changes of the operating point in a wide range, and the need to use an input LC filter for current smoothing, which may resul... Read More about Sliding Mode Input Current Control of the Synchronous DC-DC Buck Converter for Electro-Mechanical Actuator Emulation in More Electric Aircrafts.

Analysis of Using a Thermoelectric Module for Power Electronics Cooling (2022)
Conference Proceeding
Abubakar, A., Klumpner, C., & Wheeler, P. (2022). Analysis of Using a Thermoelectric Module for Power Electronics Cooling. In 2022 IEEE 1st Industrial Electronics Society Annual On-Line Conference (ONCON) (909-914). https://doi.org/10.1109/oncon56984.2022.10126992

This paper aims to develop a PLECS equivalent circuit of a thermoelectric module to be used in power electronics cooling applications. The proposed model is built using elements from the PLECS thermal model block-set. To test this, a resistive c dev... Read More about Analysis of Using a Thermoelectric Module for Power Electronics Cooling.

A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles (2022)
Journal Article
Fares, A. M., Klumpner, C., & Sumner, M. (2022). A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles. Applied Sciences, 12(6), Article 2767. https://doi.org/10.3390/app12062767

This paper proposes an integrated multiport non-isolated DC–DC converter system for integrating battery–supercapacitor hybrid energy storage with photovoltaics for solar-powered unmanned aerial vehicles applications. Compared to the traditional topol... Read More about A Novel Multiport DC-DC Converter for Enhancing the Design and Performance of Battery–Supercapacitor Hybrid Energy Storage Systems for Unmanned Aerial Vehicles.

Development of a smart supercapacitor energy storage system for aircraft electric power systems (2021)
Journal Article
Fares, A. M., Kippke, M., Rashed, M., Klumpner, C., & Bozhko, S. (2021). Development of a smart supercapacitor energy storage system for aircraft electric power systems. Energies, 14(23), Article 8056. https://doi.org/10.3390/en14238056

This paper presents the development of a supercapacitor energy storage system (ESS) aimed to minimize weight, which is very important for aerospace applications, whilst integrating smart functionalities like voltage monitoring, equalization, and over... Read More about Development of a smart supercapacitor energy storage system for aircraft electric power systems.

Modeling and experimental evaluation of z-source modular multilevel converter using reduced inserted cells technique (2021)
Journal Article
Khera, F. A., Klumpner, C., & Wheeler, P. (2021). Modeling and experimental evaluation of z-source modular multilevel converter using reduced inserted cells technique. IEEE Access, 9, 133091-133101. https://doi.org/10.1109/ACCESS.2021.3115634

The integration of a Z-source network with a modular multilevel converter (MMC) to provide voltage step-up function is proposed in this paper. The proposed Z-source modular multilevel converter (ZS-MMC) uses a Z-source network connected between the D... Read More about Modeling and experimental evaluation of z-source modular multilevel converter using reduced inserted cells technique.

Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor (2021)
Conference Proceeding
Raqib, A., Jahanger, H., Sumner, M., Cox, T., Klumpner, C., Agha, I., …Lonsdale, P. (2021). Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor. In 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020) (621 – 626). https://doi.org/10.1049/icp.2021.1169

Electrolytic capacitors continue to be used for the DC-link in motor drive systems due to their high specific capacitance. The degradation of electrolytic capacitors can lead to increased equivalent series resistances (ESR) and reduction in capacitan... Read More about Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor.

Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator (2021)
Conference Proceeding
Lukic, M., Giangrande, P., Klumpner, C., & Galea, M. (2021). Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator. . https://doi.org/10.1109/ISIE45552.2021.9576403

The aerospace industry is rapidly changing towards more electric aircraft initiative, trying to alleviate pollution problems and obey the authority bodies' strict rules. Not only should aircraft comply with this initiative but also helicopters (i.e.,... Read More about Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator.

Experimental evaluation of an energy storage system for medium voltage distribution grids enabling solid?state substation functionality (2021)
Journal Article
Klumpner, C., Rashed, M., De, D., Patel, C., & Asher, G. (2021). Experimental evaluation of an energy storage system for medium voltage distribution grids enabling solid?state substation functionality. IET Smart Grid, 4(2), 190-201. https://doi.org/10.1049/stg2.12019

"Smart grids" is a new concept of managing the power transfer in modern grids that will rely not only on the on-line processing of a variety of consumption and generation power data but will also need new hardware to facilitate a flexible and efficie... Read More about Experimental evaluation of an energy storage system for medium voltage distribution grids enabling solid?state substation functionality.

Analysing the converter requirements for a dual-fed induction machine based flywheel energy storage system (2020)
Presentation / Conference
Klumpner, C. (2020, December). Analysing the converter requirements for a dual-fed induction machine based flywheel energy storage system. Paper presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online

The Dual-fed Induction Machine was used very successfully in wind generators as it allowed full control of the power captured from the wind within a wide relevant rotational speed range around the synchronous speed needing only a low power rated roto... Read More about Analysing the converter requirements for a dual-fed induction machine based flywheel energy storage system.

Quasi Z-Source Hybrid Modular Multilevel Converter Controlled By Reduced Inserted Cells Modulation Technique For Medium Voltage Applications (2020)
Presentation / Conference
Khera, F., Klumpner, C., & Wheeler, P. (2020, December). Quasi Z-Source Hybrid Modular Multilevel Converter Controlled By Reduced Inserted Cells Modulation Technique For Medium Voltage Applications. Paper presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online

This paper presents a novel quasi Z-source Hybrid modular multilevel converter (qZS-HMMC) for medium voltage applications where the “hybrid” concept refers to the implementation of the MMC strings that consist of a mixture of half bridge sub-modules... Read More about Quasi Z-Source Hybrid Modular Multilevel Converter Controlled By Reduced Inserted Cells Modulation Technique For Medium Voltage Applications.

Evaluation of inverter topologies for high power medium voltage aircraft applications (2020)
Presentation / Conference
Klumpner, C., & Khera, F. (2020, December). Evaluation of inverter topologies for high power medium voltage aircraft applications. Paper presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online

Future generation more electric aircrafts will require significantly larger power do be generated on board and for this reason, being able to identify which high power/medium voltage AC/DC power converter topologies would suit the best,is important.... Read More about Evaluation of inverter topologies for high power medium voltage aircraft applications.

Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting (2020)
Conference Proceeding
Lukic, M., Giangrande, P., Klumpner, C., & Galea, M. (2020). Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting. In 2020 IEEE Vehicle Power and Propulsion Conference (VPPC). https://doi.org/10.1109/vppc49601.2020.9330955

This paper describes a new curve-fitting lithium-ion battery parameter identification method for equivalent circuit models. The current pulse/relaxation test is carried out and the corresponding terminal voltage is used for extracting the battery mod... Read More about Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting.

Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems (2020)
Journal Article
Recalde, A., Lukic, M., Hebala, A., Giangrande, P., Klumpner, C., Nuzzo, S., …Galea, M. (2021). Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems. IEEE Transactions on Transportation Electrification, 7(3), 1870-1887. https://doi.org/10.1109/TTE.2020.3039759

IEEE Aircraft taxiing is conventionally performed using the main engines’ inefficient idle thrust. Therefore, in line with greener aviation, the electrification of taxiing is the most viable option to reduce emissions, noise, and fossil fuel consumpt... Read More about Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems.

Experimental Validation of a quasi Z-Source Modular Multilevel Converter with DC Fault Blocking Capability (2019)
Journal Article
Khera, F., Klumpner, C., & Wheeler, P. (2021). Experimental Validation of a quasi Z-Source Modular Multilevel Converter with DC Fault Blocking Capability. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(2), 1951-1965. https://doi.org/10.1109/jestpe.2019.2955859

This paper considers the design methodology and the modulation of the quasi Z-source modular multilevel converter (qZS-MMC) with half bridge sub-modules and evaluates its performance in voltage boosting mode for medium voltage applications. The qZS-M... Read More about Experimental Validation of a quasi Z-Source Modular Multilevel Converter with DC Fault Blocking Capability.

An Exploration of Design Options for Integrated Residential PV-ESS (2019)
Conference Proceeding
Panagiotou, K., Klumpner, C., Sumner, M., & Georghiou, G. E. (2019). An Exploration of Design Options for Integrated Residential PV-ESS. In Proceedings: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society (4721-4726). https://doi.org/10.1109/IECON.2019.8927217

The behind-the-meter integration of the distributed energy sources and the energy storage systems (ESSs) presents one of the key solutions for the 21st century energy and power challenges. A comprehensive design and development procedure, which integ... Read More about An Exploration of Design Options for Integrated Residential PV-ESS.

Analysis of Energy Storage System Requirements for Aircraft Electric Taxiing Operations (2019)
Conference Proceeding
Lukic, M., Giangrande, P., Klumpner, C., & Galea, M. (2019). Analysis of Energy Storage System Requirements for Aircraft Electric Taxiing Operations. . https://doi.org/10.1109/IECON.2019.8926797

This paper focuses on evaluating the energy and power requirements of a specific aircraft on-board electric taxiing (ET) system. The developed model of the investigated system is used to determine the requisites for a typical taxiing profile mission... Read More about Analysis of Energy Storage System Requirements for Aircraft Electric Taxiing Operations.

Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs (2019)
Journal Article
Fares, A. M., Klumpner, C., & Sumner, M. (2019). Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs. Journal of Engineering, 2019(17), 3862-3866. https://doi.org/10.1049/joe.2018.8228

The overall performance of battery packs may be affected by imbalances between the series connected cells which is more likely in packs with high number of cells needed to provide a high voltage as needed for example in electric vehicles. In this cas... Read More about Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs.