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A comparison of modulation techniques for three-phase quasi Z-source modular multilevel converter able to provide DC-link fault blocking capability (2018)
Presentation / Conference Contribution
Khera, F. A., Klumpner, C., & Wheeler, P. W. (2018, September). A comparison of modulation techniques for three-phase quasi Z-source modular multilevel converter able to provide DC-link fault blocking capability. Paper presented at EPE'18 ECCE Europe - 20th European Conference on Power Electronics and Applications

Future transmission and distribution grids will use power converters to enable interface with HVDC systems and the Modular Multilevel Converter (MMC) is a topology that is already employed in commercial systems. The MMC converter inherent the benefit... Read More about A comparison of modulation techniques for three-phase quasi Z-source modular multilevel converter able to provide DC-link fault blocking capability.

Energy harvesting utilizing reciprocating flow-induced torsional vibration on a T-shaped cantilever beam (2018)
Journal Article
Zhang, G., Klumpner, C., & Lin, Y.-J. (2018). Energy harvesting utilizing reciprocating flow-induced torsional vibration on a T-shaped cantilever beam. Smart Materials and Structures, https://doi.org/10.1088/1361-665x/aadb6d

This paper proposes a T-shaped cantilever energy harvester powered by flow-induced torsional vibration. To collect and convert the mechanical (kinetic) energy into electric power, a pair of symmetrical acrylic cylindrical bluff bodies were installed... Read More about Energy harvesting utilizing reciprocating flow-induced torsional vibration on a T-shaped cantilever beam.

Sizing guidelines for grid-connected decentralised energy storage systems: single house application (2018)
Presentation / Conference Contribution
Panagiotou, K., Klumpner, C., & Sumner, M. (2018). Sizing guidelines for grid-connected decentralised energy storage systems: single house application.

Nowadays, the existing hierarchical, centrally controlled power grid faces new challenges due to the increase penetration of renewable sources, the need of implementing demand side management and the 2020 and 2050 environmental targets. A promising c... Read More about Sizing guidelines for grid-connected decentralised energy storage systems: single house application.

New modulation scheme for bidirectional quasi z-source modular multilevel converters (2018)
Presentation / Conference Contribution
Khera, F., Klumpner, C., & Wheeler, P. (2018). New modulation scheme for bidirectional quasi z-source modular multilevel converters.

This paper proposes a dedicated modulation scheme for a bidirectional quasi Z-source modular multilevel converter (BqZS-MMC). The operation principle and a suitable PWM method are proposed. The relation between the modulation index and shoot-through... Read More about New modulation scheme for bidirectional quasi z-source modular multilevel converters.

Design and evaluation of an energy storage system for helicopters (2018)
Presentation / Conference Contribution
Klumpner, C., & Rashed, M. (2018). Design and evaluation of an energy storage system for helicopters.

This paper presents the design and evaluation of an energy storage system (ESS) for helicopters with the aim to recover the kinetic energy in the rotor available after landing and to be able to control the 270V dc bus voltage during load disturbances... Read More about Design and evaluation of an energy storage system for helicopters.

Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs (2018)
Presentation / Conference Contribution
Fares, A., Klumpner, C., & Sumner, M. (2018). Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs.

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.

Operation principles of quasi Z-source modular multilevel converters (2018)
Presentation / Conference Contribution
Khera, F. A., Klumpner, C., & Wheeler, P. W. (2018). Operation principles of quasi Z-source modular multilevel converters. In Proceedings 2017 IEEE Southern Power Electronics Conference (SPEC) (1-6). https://doi.org/10.1109/SPEC.2017.8333617

This paper proposes the integration of a quasi Z-source network with a modular multilevel converter (MMC) to provide voltage boost capability. The proposed quasi-Z-source MMC uses two symmetrical networks of inductors and capacitors connected between... Read More about Operation principles of quasi Z-source modular multilevel converters.

Design recommendations for energy systems: a UK energy community study (2017)
Presentation / Conference Contribution
Panagiotou, K., Klumpner, C., Sumner, M., & Wheeler, P. (in press). Design recommendations for energy systems: a UK energy community study.

One of the key elements towards a decentralised energy sector is the consumers’ choice and participation, as the concept of energy prosumer is gaining more and more ground and energy community projects are spouting across UK. In order for the upcomin... Read More about Design recommendations for energy systems: a UK energy community study.

Being a member of an energy community: Assessing the financial benefits for end-users and management authority (2017)
Presentation / Conference Contribution
Panagiotou, K., Klumpner, C., & Sumner, M. (2017). Being a member of an energy community: Assessing the financial benefits for end-users and management authority. In 2017 IEEE 26th International Symposium on Industrial Electronics (ISIE) (957-963). https://doi.org/10.1109/ISIE.2017.8001375

Since 2011, in the context of sustainable development, UK government has been encouraging individuals to work as groups, and now, more than 5,000 community led projects are sprouted across the country, since more than 50% of the UK citizens had expre... Read More about Being a member of an energy community: Assessing the financial benefits for end-users and management authority.

A flow-induced structure-based kinetic energy harvester (2017)
Presentation / Conference Contribution
Zhang, G., Lin, Y., & Klumpner, C. (2017). A flow-induced structure-based kinetic energy harvester.

In this paper, a strategy utilizing a pair of cylinders which are put on the both sides of the cantilever beam and perpendicular to the water flow direction to harvest the energy is demonstrated. The novel flow induced structure based energy harveste... Read More about A flow-induced structure-based kinetic energy harvester.

Experimental validation of the solid state substation with embedded energy storage concept (2016)
Presentation / Conference Contribution
Klumpner, C., Rashed, M., De, D., Patel, C., Kulsangcharoen, P., & Asher, G. (2016). Experimental validation of the solid state substation with embedded energy storage concept. In 2016 IEEE Energy Conversion Congress and Exposition (ECCE) - Proceedings (1-8). https://doi.org/10.1109/ECCE.2016.7855100

This paper proposes the concept of integrating the energy storage within a Medium Voltage to Low Voltage solid state substation in order to provide new features compatible with the requirements from future more intelligent grids. The principles for t... Read More about Experimental validation of the solid state substation with embedded energy storage concept.

Hybrid inverter arrangements to facilitate reduced switching losses of the main inverter (2016)
Presentation / Conference Contribution
Klumpner, C., & Zargar, T. (2016). Hybrid inverter arrangements to facilitate reduced switching losses of the main inverter.

This paper investigates two hybrid inverter topologies consisting of a slow switching DC/AC main voltage source inverter and output series connected low-voltage rated, fast switching auxiliary inverters that may be suitable for medium and high voltag... Read More about Hybrid inverter arrangements to facilitate reduced switching losses of the main inverter.

Development of a battery energy loss observer based on improved equivalent circuit modelling (2016)
Presentation / Conference Contribution
Fares, A., Klumpner, C., & Sumner, M. (2016). Development of a battery energy loss observer based on improved equivalent circuit modelling. . https://doi.org/10.1109/EPE.2016.7695602

This paper proposes a new energy loss observer for batteries that has a good accuracy and low complexity. This observer can provide a support for battery management systems (BMS) in terms of predicting battery energy loss and/or battery internal temp... Read More about Development of a battery energy loss observer based on improved equivalent circuit modelling.

The effect of including power converter losses when modelling energy storage systems: a UK domestic study (2016)
Presentation / Conference Contribution
Panagiotou, K., Klumpner, C., & Sumner, M. (2016). The effect of including power converter losses when modelling energy storage systems: a UK domestic study.

Energy storage systems (ESS) are seen as an increasingly important technology for managing electrical distribution systems, and there is now much research into both the underlying technologies of these systems, and their “optimum” management especial... Read More about The effect of including power converter losses when modelling energy storage systems: a UK domestic study.

Regenerative multi-source power conversion system (2013)
Presentation / Conference Contribution
Klumpner, C. (2013). Regenerative multi-source power conversion system.

This presentation shows the progress made on the REGENSYS JTI-CS-2011-3-GRC-03-011 Clean Sky project as of December 2013.

Evaluation of a digitally controlled power electronic emulator for supercapattery (2012)
Presentation / Conference Contribution
Kulsangcharoen, P., Rashed, M., Klumpner, C., De, D., Patel, C., Asher, G., & Chen, G. Z. (2012). Evaluation of a digitally controlled power electronic emulator for supercapattery. In 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012). https://doi.org/10.1049/cp.2012.0341

Newly developed electrochemical energy storage devices are typically produced as single/small quantity and small size devices. This makes their evaluation very difficult in high power applications that would require production of much larger size dev... Read More about Evaluation of a digitally controlled power electronic emulator for supercapattery.

Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications (2012)
Presentation / Conference Contribution
De, D., Klumpner, C., Rashed, M., Patel, C., Kulsangcharoen, P., & Asher, G. (2012). Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications. In 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012). https://doi.org/10.1049/cp.2012.0212

This paper presents a cost effective winding design and evaluation of a medium frequency isolation transformer typically used in bidirectional isolated DC/DC converters. Since leakage inductance and winding resistance of a high frequency transformer... Read More about Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications.

Assessing the benefits of hybrid cycloconverters (2011)
Journal Article
Xu, T., Klumpner, C., & Clare, J. (2011). Assessing the benefits of hybrid cycloconverters. IEEE Transactions on Industrial Electronics, 59(1), https://doi.org/10.1109/TIE.2011.2165194

Power converters consisting of naturally commutated thyristors such as cycloconverters and current source inverters were the first to be used in driving electrical motors with variable speed, but now, due to their inferior performance compared to for... Read More about Assessing the benefits of hybrid cycloconverters.