Recent Submissions

  • Design and implementation of 30kW 200/900v LCL modular multilevel based DC/DC converter for high power applications. 

    Fazeli, S. M.; Aboushady, Ahmed A.; Ahmed, Khaled H.; Jovcic, Dragan (IET http://dx.doi.org/10.1049/cp.2016.0144, 2016-04-19)
    FAZELI, S.M., ABOUSHADY, A.A., AHMED, K.H. and JOVCIC, D. 2016. Design and implementation of 30kW 200/900v LCL modular multilevel based DC/DC converter for high power applications. In the Proceedings of the 8th IET international conference on power electronics, machines and drives, 19-21 April 2016, Glasgow, UK. New York: IET [online]. Available from: http://dx.doi.org/10.1049/cp.2016.0144
    This paper presents the design, development and testing of a 30kW, 200V/900V modular multilevel converter (MMC) based DC/DC converter prototype. An internal LCL circuit is used to provide voltage stepping and fault tolerance ...
  • DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application. 

    Harrye, Yasen A.; Ahmed, Khaled H.; Aboushady, Ahmed A. (IEEE https://dx.doi.org/10.1109/IECON.2015.7392592, 2015-11-09)
    HARRYE, Y.A., AHMED, K.H. and ABOUSHADY, A.A. 2015. DC fault isolation study of bidirectional dual active bridge DC/DC converter for DC transmission grid application. In the Proceedings of the 41st annual conference of the IEEE industrial electronics society (IECON 2015), 9-12 November 2015, Yokohama, Japan. New York: IEEE [online], pages 003193-003198. Available from: https://dx.doi.org/10.1109/IECON.2015.7392592.
    Fast isolation and detection of DC faults is currently a limiting factor in high power DC transmission grid development. Recent research has shown that the role of DC/DC converters is becoming increasingly important in ...
  • Modular multilevel converter based LCL DC/DC converter for high power DC transmission grids. 

    Aboushady, Ahmed A.; Ahmed, Khaled H.; Jovcic, Dragan (EPE 2015 ECCE Europe (Organisers), 2015-09-08)
    ABOUSHADY, A.A., AHMED, K.H. and JOVCIC, D. 2015. Modular multilevel converter based LCL DC/DC converter for high power DC transmission grids. In the Proceedings of the 17th European conference on power electronics and applications (EPE 2015 ECCE Europe), 8-10 September 2015, Geneva, Switzerland.
    This paper presents a modular multilevel converter (MMC) based DC/DC converter with LCL inner circuit for HVDC transmission and DC grids. Three main design challenges are addressed. The first challenge is the use of MMCs ...
  • Analysis and hardware testing of cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. 

    Aboushady, Ahmed A.; Ahmed, Khaled H.; Jovcic, Dragan (IEEE https://dx.doi.org/10.1049/cp.2015.0010, 2015-02-10)
    ABOUSHADY, A.A., AHMED, K.H. and JOVCIC, D. 2015. Analysis and hardware testing of cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. In the Proceedings of the 11th international conference on AC and DC power transmission, 10-12 February 2015, Birminham, UK. New York: IEEE [online], pages 1-7. Available from: https://dx.doi.org/10.1049/cp.2015.0010
    This paper focuses on the behaviour of the cell capacitor discharge currents during DC faults in half-bridge modular multilevel converters. Active switches, not designed for fault conditions, are tripped to minimize discharge ...
  • Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. 

    Ahmed, Khaled H.; Aboushady, Ahmed A. (IEEE https://dx.doi.org/10.1109/IECON.2014.7049207, 2014-10-30)
    AHMED, K.H. and ABOUSHADY, A.A. 2014. Modified half-bridge modular multilevel converter for HVDC systems with DC fault ride-through capability. In the Proceedings of the 40th annual conference of the IEEE industrial electronics society (IECON 2014), 30 October - 1 November 2014, Dallas, USA. New York: IEEE [online], pages 4676-4682. Available from: https://dx.doi.org/10.1109/IECON.2014.7049207.
    One of the main challenges of voltage source converter based HVDC systems is DC faults. In this paper, two different modified half-bridge modular multilevel converter topologies are proposed. The proposed converters offer ...
  • Sensorless multi-loop control of phase-controlled series-parallel resonant converter. 

    Aboushady, Ahmed A.; Ahmed, Khaled H. (IEEE https://dx.doi.org/10.1109/ICRERA.2014.7016435, 2014-10-19)
    ABOUSHADY, A.A. and AHMED, K.H. 2014. Sensorless multi-loop control of phase-controlled series-parallel resonant converter. In the Proceedings of the 3rd international conference on renewable energy research and applications (ICRERA 2014), 19-22 October 2014, Milwaukee, USA. New York: IEEE [online], pages 502-507. Available from: https://dx.doi.org/10.1109/ICRERA.2014.7016435.
    This paper proposes a multi-loop controller for the phase-controlled series-parallel resonant converter. Output voltage is solely measured for control and inner loop is used to enhance closed loop stability and dynamic ...
  • Reactive power minimization of dual active bridge DC/DC converter with triple phase shift control using open loop neural network. 

    Harrye, Yasen A.; Ahmed, Khaled H.; Aboushady, Ahmed A. (IEEE https://dx.doi.org/10.1109/ICRERA.2014.7016448, 2014-10-19)
    HARRYE, Y.A., AHMED, K.H. and ABOUSHADY, A.A. 2014. Reactive power minimization of dual active bridge DC/DC converter with triple phase shift control using neural network. In the Proceedings of the 3rd international conference on renewable energy research and applications (ICRERA 2014), 19-22 October 2014, Milwaukee, USA. New York: IEEE [online], pages 566-571. Available from: https://dx.doi.org/10.1109/ICRERA.2014.7016448
    Reactive power flow increases dual active bridge (DAB) converter RMS current leading to an increase in conduction losses especially in high power applications. This paper proposes a new optimized triple phase shift (TPS) ...
  • Comprehensive steady state analysis of bidirectional dual active bridge DC/DC converter using triple phase shift control. 

    Harrye, Yasen A.; Ahmed, Khaled H.; Adam, G. P.; Aboushady, Ahmed A. (IEEE https://dx.doi.org/10.1109/ISIE.2014.6864653, 2014-06-01)
    HARRYE, Y.A., AHMED, K.H., ADAM, G.P. and ABOUSHADY, A.A. 2014. Comprehensive steady state analysis of bidirectional dual active bridge DC/DC converter using triple phase shift control. In the Proceedings of the 23rd International symposium on industrial electronics (ISIE 2014), 1-4 June 2014, Istanbul, Turkey. New York: IEEE [online], pages 437-442. Available from: https://dx.doi.org/10.1109/ISIE.2014.6864653
    Several papers have been published recently on TPS control of dual active bridge (DAB) converter, however, no complete study of the converter operation behaviour exists, that takes into account all switching modes in both ...
  • Characteristics of electroluminescence phenomenon in virgin and thermally aged LDPE. 

    Bani, Nurul Aini; Abdul-Malek, Z.; Ahmad, H.; Muhammad-Sukki, Firdaus; Mas’ud, Abdullahi Abubakar (AIP Publishing, 2015)
    BANI, N.A., ABDUL-MALEK, Z. and AHMAD, H., 2015. Characteristics of electroluminescence phenomenon in virgin and thermally aged LDPE. AIP Conference Proceedings, 1674, 020005.
    High voltage cable requires a good insulating material such as low density polyethylene (LDPE) to be able to operate efficiently in high voltage stresses and high temperature environment. However, any polymeric material ...
  • Modelling of electroluminescence in polymeric material using dimensional analysis method: effect of applied voltage and frequency. 

    Bani, Nurul Aini; Abdul-Malek, Z.; Ahmad, H.; Muhammad-Sukki, Firdaus; Abubakar Mas'ud, A. (IICIST http://www.utm.my/iicist/?page_id=442, 2015-04)
    BANI, N.A., ABDUL-MALEK, Z., AHMAD, H., MUHAMMAD-SUKKI, F., ABUBAKAR MAS’UD, A., 2015. Modelling of electroluminescence in polymeric material using dimensional analysis method: effect of applied voltage and frequency. In: Z. MOHAMED et al. [eds] 1st ICRIL-International Conference on Innovation in Science and Technology (IICIST 2015): Proceedings. 20 April 2015. [online] IICIST. Pp. 803-806. Available from: http://www.utm.my/iicist/?page_id=442 [Accessed 15 July 2015]
    Electroluminescence (EL) method has been used by several researchers to observe the behaviour of an aged polymeric material. EL is a phenomenon that occurs when the atoms of a material are being excited due to the application ...
  • Gas transport and characterization of inorganic ceramic membrane for lactic acid esterification. 

    Edidiong, Okon; Habiba, Shehu; Gobina, Edward (International Association of Engineers., 2014-10)
    EDIDIONG, O., HABIBA, S. and GOBINA, E., 2014. Gas transport and characterization of inorganic ceramic membrane for lactic acid esterification. In: S.I. AO, C. DOUGLAS, W.S. GRUNDFEST and J. BURGSTONE, EDS. Proceedings of the World Congress on Engineering and Computer Science 2014. 22-24 October, 2014. San Francisco: International Association of Engineers. Volume II, pp. 590-594. ISBN 9789881925374.
    Ethyl lactate is an important organic ester, which is biodegradable in nature and widely used as food additive, perfumery, flavor chemicals and solvent. Inorganic porous ceramic membrane has shown a lot of advantages in ...

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