All Outputs (408)

Intelligent impedance based fault-location for zonal power systems (2014)
Conference Proceeding
Rose, C. J., Thomas, D. W., Sumner, M., Christopher, E., & Lopez Arevalo, S. (2014). Intelligent impedance based fault-location for zonal power systems.

A laboratory based demonstrator has been constructed to study the Active Impedance Estimation (AIE) technique as a means of locating faults on a power system. The demonstrator has been used to verify results from simulation experimentally. The AIE sy... Read More about Intelligent impedance based fault-location for zonal power systems.

A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography (2014)
Conference Proceeding
Agyakwa, P., Yang, L., Corfield, M., & Johnson, C. M. (2014). A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography.

This paper concerns the non-destructive visualisation of the evolution of damage within ultrasonically bonded alumini-um wires using three dimensional x-ray computed tomography. We demonstrate the potential to observe the progressive accumulation of... Read More about A non-destructive study of crack development during thermal cycling of Al wire bonds using x-ray computed tomography.

Implementation of a multi-level Power Electronic Inverter library in Modelica (2014)
Conference Proceeding
Hill, C., Giangrande, P., Gerada, C., & Bozhko, S. (in press). Implementation of a multi-level Power Electronic Inverter library in Modelica.

This paper presents a newly developed Power Electronic Inverter library in Modelica. The library utilises a multi-level approach with increasing model complexity at progressively higher levels. All levels are fully interchangeable so as to provide a... Read More about Implementation of a multi-level Power Electronic Inverter library in Modelica.

Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study (2014)
Conference Proceeding
Phang, S., Vukovic, A., Benson, T. M., Creagh, S., Sewell, P., & Gradoni, G. (2014). Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study.

In this paper, numerical modelling of Parity-Time (PT) coupled waveguides is reported. The PT coupled waveguide structure consists of two coupled slab waveguides based on GaAs material with gain/loss material parameter models, including both dispersi... Read More about Saturable and dispersive parity-time symmetric directional coupler: a transmission-line modelling study.

Modelling of dispersive PT-symmetric Bragg grating (2014)
Conference Proceeding
Phang, S., Vukovic, A., Susanto, H., Benson, T. M., & Sewell, P. (2014). Modelling of dispersive PT-symmetric Bragg grating.

This paper reports on the time-domain numerical model of a parity-time Bragg grating with saturated and dispersive gain. The model is compared against the ideal PT scenario where the gain is constant and unsaturated for all frequencies.

Regenerative multi-source power conversion system (2013)
Conference Proceeding
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.

Comparison of multilevel PWM versus interleaved based sinewave shaping for two-stage current source inverters used in PV applications (2013)
Conference Proceeding
Papadopoulos, S., & Klumpner, C. (2013). Comparison of multilevel PWM versus interleaved based sinewave shaping for two-stage current source inverters used in PV applications. In 2013 15th European Conference on Power Electronics and Applications (EPE). https://doi.org/10.1109/EPE.2013.6634633

This paper investigates the advantages of using interleaved based direct sinusoidal current shaping techniques as alternative to 5-level Pulse Width Modulation (PWM) when used in conjunction to a two stage Current Source Inverter (CSI) in PV applicat... Read More about Comparison of multilevel PWM versus interleaved based sinewave shaping for two-stage current source inverters used in PV applications.

User requirements for the development of smartphone self-reporting applications in healthcare (2013)
Conference Proceeding
Craven, M. P., Selvarajah, K., Miles, R., Schnädelbach, H., Massey, A., Vedhara, K., …Crowe, J. (2013). User requirements for the development of smartphone self-reporting applications in healthcare. In Human-Computer Interaction. Applications and Services. https://doi.org/10.1007/978-3-642-39262-7_5

Two case studies of the development of Smartphone self-reporting mHealth applications are described: a wellness diary for asthma management combined with Bluetooth pulse oximeter and manual peak flow measurements; and a questionnaire for ecological a... Read More about User requirements for the development of smartphone self-reporting applications in healthcare.

Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications (2012)
Conference Proceeding
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.

Characterization of energy storage devices for constant power applications (2010)
Conference Proceeding
Kulsangcharoen, P., Klumpner, C., Rashed, M., & Asher, G. (2010). Characterization of energy storage devices for constant power applications. In IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society. https://doi.org/10.1109/IECON.2010.5675401

In this paper, a few known characterization techniques for supercapacitors have been evaluated with the purpose of being able to predict the roundtrip efficiency of an energy storage system under constant power application. It is found that the user... Read More about Characterization of energy storage devices for constant power applications.

High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids (2010)
Conference Proceeding
Rashed, M., Klumpner, C., & Asher, G. (2010). High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids. In IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society. https://doi.org/10.1109/IECON.2010.5675400

This paper proposes a high performance hybrid cascaded H-Bridge (HB) Multilevel Converter (MLC) with integrated Series Active Power Filter SAPF for interfacing energy storage systems with medium voltage grids. Isolated DC sources comprised of modular... Read More about High performance multilevel converter topology for interfacing energy storage systems with medium voltage grids.

Hybrid cascaded multilevel converter with integrated series Active Power Filter for interfacing energy storage system to medium voltage grid (2010)
Conference Proceeding
Rashed, M., Klumpner, C., & Asher, G. (2010). Hybrid cascaded multilevel converter with integrated series Active Power Filter for interfacing energy storage system to medium voltage grid. In The 2010 International Power Electronics Conference - ECCE ASIA -. https://doi.org/10.1109/IPEC.2010.5543461

This paper presents a new control strategy for a high performance hybrid cascaded H-Bridge HB multilevel converter with integrated series Active Power Filter Stage APFS. Unequal DC voltage sources are used to energise the converter's HBs. This offers... Read More about Hybrid cascaded multilevel converter with integrated series Active Power Filter for interfacing energy storage system to medium voltage grid.

A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique (2009)
Conference Proceeding
Klumpner, C., & Shattock, N. (2009). A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique. In 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition. https://doi.org/10.1109/APEC.2009.4802910

Multilevel inverters are traditionally seen as a step forward in DC/AC conversion, providing more output voltage levels, better quality of the generated waveform and lower switching losses than the two-level and can process higher voltages with a giv... Read More about A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique.

Experimental evaluation of hybrid cycloconverters (2009)
Conference Proceeding
Klumpner, C., Xu, T., & Clare, J. C. (2009). Experimental evaluation of hybrid cycloconverters. In 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition. https://doi.org/10.1109/APEC.2009.4802737

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

Hybrid matrix converter topologies: an exploration of benefits (2008)
Conference Proceeding
Klumpner, C., & Pitic, C. (2008). Hybrid matrix converter topologies: an exploration of benefits. In 2008 IEEE Power Electronics Specialists Conference. https://doi.org/10.1109/PESC.2008.4591887

Matrix converters are direct AC/AC power converters that can operate with sinusoidal output/input voltage/currents without the need of passive components to store energy, which means that they are grid friendly and have a great weight/volume reductio... Read More about Hybrid matrix converter topologies: an exploration of benefits.

A new class of hybrid AC/AC direct power converters
Conference Proceeding
Klumpner, C., Wijekoon, T., & Wheeler, P. (in press). A new class of hybrid AC/AC direct power converters. In Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005. https://doi.org/10.1109/IAS.2005.1518793

Variable voltage and variable frequency conversion of electrical energy from an AC source to an AC load is done in traditional power converters via a DC-link where an energy storage element (electrolytic capacitors) is situated. Despite its well-know... Read More about A new class of hybrid AC/AC direct power converters.

A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio
Conference Proceeding
Klumpner, C. (in press). A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio. In Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06. https://doi.org/10.1109/APEC.2006.1620528

Achieving a compact and efficient design of power electronic converters is not a straightforward procedure: minimizing the size of the filter requires a higher switching frequency that causes additional switching losses that will require a larger hea... Read More about A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio.

A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses
Conference Proceeding
Klumpner, C. (in press). A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses. In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. https://doi.org/10.1109/IECON.2006.347904

This paper proposes a new DC/AC power converter topology that is obtained by merging a buck type DC/DC converter and a DC/AC three-phase PWM Voltage Source Inverter (VSI) without the need of the passive components (smoothing inductor and capacitance)... Read More about A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses.

A new three-level sparse indirect matrix converter
Conference Proceeding
Klumpner, C., Lee, M. Y., & Wheeler, P. (in press). A new three-level sparse indirect matrix converter. In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. https://doi.org/10.1109/IECON.2006.347958

Matrix converters are forced commutated single stage AC/AC direct frequency changers able to achieve sine wave in and out operation by being able to connect any input phase to any output phase via a 3x3 matrix of bi-directional switches. Indirect two... Read More about A new three-level sparse indirect matrix converter.

A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current
Conference Proceeding
Klumpner, C., Xu, T., & Clare, J. (in press). A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current. In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. https://doi.org/10.1109/IECON.2006.347850

Nowadays, power electronic converters based exclusively on IGBTs deliver excellent load side performance up to megawatt powers in the low voltage range (200-690V) and are steadily gaining performance in the medium voltage range as well. However, the... Read More about A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current.