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 ...
  • Modelling the effect of applied voltage and frequency on electroluminescence in polymeric material. 

    Bani, Nurul Aini; Abdul-Malek, Z.; Muhammad-Sukki, Firdaus; Abubakar Mas'ud, A.; Muhtazaruddin, M. N.; Kamardin, K.; Jamian, J. J.; Ahmad, H. (Institute of advanced engineering and science https://dx.doi.org/10.11591/ijece.v6i3.9573, 2016-06-01)
    BANI, N.A., ABDUL-MALEK, Z., MUHAMMAD-SUKKI, F., MASUD, A.A., MUHTAZARUDDIN, M.N., KAMARDIN, K., JAMIAN, J.J. and AHMAD, H. 2016. Modelling the effect of applied voltage and frequency on electroluminescence in polymeric material. International journal of electrical and computer engineering [online], 6(3), pages 1375-1384. Available from: https://dx.doi.org/10.11591/ijece.v6i3.9573
    Electroluminescence method has been used by several researchers to observe the behaviour of an aged polymeric material. Electroluminescence is a phenomenon that occurs when the atoms of a material are being excited due to ...
  • Monitoring acoustic emission (AE) energy of abrasive particle impacts in a slurry flow loop using a statistical distribution model. 

    Droubi, M. Ghazi; Reuben, R. L. (Elsevier http://dx.doi.org/10.1016/j.apacoust.2016.06.026, 2016-07-05)
    DROUBI, M.G. and REUBEN, R.L. 2016. Monitoring acoustic emission (AE) energy of abrasive particle impacts in a slurry flow loop using a statistical distribution model. Applied acoustics [online], 133, pages 202-209. Available from: http://dx.doi.org/10.1016/j.apacoust.2016.06.026
    Slurry erosion has been recognized as a serious problem in many industrial applications. In slurry flows, the estimation of the amount of incident kinetic energy that transmits from particles suspended in the fluid to the ...
  • VOC oxidation in excess of oxygen using flow-through catalytic membrane reactor. 

    Kajama, Mohammed; Shehu, Habiba; Okon, Edidiong; Orakwe, Ify; Gobina, Edward (Elsevier https://dx.doi.org/10.1016/j.ijhydene.2016.04.164, 2016-06-17)
    KAJAMA, M.N., SHEHU, H., OKON, E., ORAKWE, I. and GOBINA, E. 2016. VOC oxidation in excess of oxygen using flow-through catalytic membrane reactor. International journal of hydrogen energy [online], In Press. Available from: https://dx.doi.org/10.1016/j.ijhydene.2016.04.164
    Platinum gamma-alumina (Pt/γ-Al2O3) impregnated membrane was prepared through the evaporative-crystallization deposition method for volatile organic compounds (VOCs) conversion to carbon dioxide (CO2) and water (H2O). The ...
  • Software simulation and experimental characterisation of a rotationally asymmetrical concentrator under direct and diffuse solar radiation. 

    Freier, Daria; Muhammad-Sukki, Firdaus; Abu-Bakar, Siti Hawa; Ramirez-Iniguez, Roberto; Abubakar Mas'ud, A.; Albarracin, Ricardo; Ardila-Rey, Jorge Alfredo; Munir, Abu Bakar; Yasin, Siti Hajar Mohd; Bani, Nurul Aini (Elsevier http://dx.doi.org/10.1016/j.enconman.2016.05.072, 2016-06-01)
    FREIER, D., MUHAMMAD-SUKKI, F., ABU-BAKAR, S.H., RAMIREZ-INIGUEZ, R., ABUBAKAR MAS’UD, A., ALBARRACIN, R., ARDILA-REY, J.A., MUNIR, A.B., YASIN, S.H.M. and BANI, N.A. 2016. Software simulation and experimental characterisation of a rotationally asymmetrical concentrator under direct and diffuse solar radiation. Energy conversion and management [online], 122, pages 223-238. Available from: http://dx.doi.org/10.1016/j.enconman.2016.05.072
    Making housing carbon neutral is one of the European Union (EU) targets with the aim to reduce energy consumption and to increase on-site renewable energy generation in the domestic sector. Optical concentrators have a ...
  • Hidden chaotic attractors in a class of two-dimensional maps. 

    Jiang, Haibo; Liu, Yang; Wei, Zhouchao; Zhang, Liping (Springer http://dx.doi.org/10.1007/s11071-016-2857-3, 2016-05-31)
    JIANG, H., LIU. Y., WEI, Z. and ZHANG, L. 2016. Hidden chaotic attractors in a class of two-dimensional maps. Nonlinear dynamics [online], (accepted). Available from: https://dx.doi.org/10.1007/s11071-016-2857-3
    This paper studies the hidden dynamics of a class of two-dimensional maps inspired by the Hénon map. A special consideration is made to the existence of fixed points and their stabilities in these maps. Our concern focuses ...
  • A review on the recent progress made on solar photovoltaic in selected countries of Sub-Saharan Africa. 

    Abubakar Mas'ud, A.; Wirba, Asan Vernyuy; Muhammad-Sukki, Firdaus; Albarracin, Ricardo; Munir, Abu Bakar; Bani, Nurul Aini (Elsevier http://dx.doi.org/10.1016/j.rser.2016.04.055, 2016-05-12)
    ABUBAKAR MAS'UD, A., WIRBA, A.V., MUHAMMAD-SUKKI, F., ALBARRACIN, R., MUNIR, A.B. and BANI, N.A. 2016. A review on the recent progress made on solar photovoltaic in selected countries of Sub-Saharan Africa. Renewable and sustainable energy reviews [online], 62, pages 441–452. Available from: http://dx.doi.org/10.1016/j.rser.2016.04.055
    The harmful effects of carbon emissions and carbon dioxide caused by over dependence on oil is a global issue, which is currently being addressed by encouraging renewable energy (RE) resources contribution to the energy ...
  • Development of plasma-sprayed molybdenum carbide-based anode layers with various metal oxides for SOFC. 

    Faisal, Nadimul Haque; Ahmed, R.; Katikaneni, S.P.; Souentie, S.; Goosen, M. F. A. (Springer https://dx.doi.org/10.1007/s11666-015-0315-2, 2015-09-25)
    FAISAL, N.H., AHMED, R., KATIKANENI, S.P., SOUENTIE, S. and GOOSEN, M.F.A. 2015. Development of plasma-sprayed molybdenum carbide-based anode layers with various metal oxides for SOFC. Journal of thermal spray technology [online], 24(8), pages 1415-1428. Available from: https://dx.doi.org/10.1007/s11666-015-0315-2
    Air plasma-sprayed (APS) coatings provide an ability to deposit a range of novel fuel cell materials at competitive costs. This work develops three separate types of composite anodes (Mo-Mo2C/Al2O3, Mo-Mo2C/ZrO2, Mo-Mo2C/TiO2) ...
  • Developing a solar calculator system. 

    Muhammad-Sukki, Saidalmaruzi; Khan, Mohd Toriq Khan Mohd Niyaz; Zeki, Akram M.; Abubakar, Adamu; Muhammad-Sukki, Firdaus (Trans Tech Publications https://dx.doi.org/10.4028/www.scientific.net/AMR.980.179, 2014-06-30)
    MUHAMMAD-SUKKI, S., KHAN, M.T.K.M.N., ZEKI, A.M., ABUBAKAR, A. and MUHAMMAD-SUKKI, F. 2014. Developing a solar calculator system. Advanced materials research [online], 980, pages 179-183. Available from: https://dx.doi.org/10.4028/www.scientific.net/AMR.980.179
    There is a rapid increase in global warming over the years. This follows with continues campaign on reducing the energy consumption and protecting the earth against climate change. The Feed-In Tariff (FiT) program was ...
  • Can a carbon nano-coating resist metallic phase transformation in silicon substrate during nanoimpact? 

    Goel, Saurav; Agrawal, Anupam; Faisal, Nadimul Haque (Elsevier http://dx.doi.org/10.1016/j.wear.2014.03.009, 2014-03-29)
    GOEL, S., AGRAWAL, A. and FAISAL, N.H. 2014. Can a carbon nano-coating resist metallic phase transformation in silicon substrate during nanoimpact? Wear [online], 315(1-2), pages 38-41. Available from: http://dx.doi.org/10.1016/j.wear.2014.03.009
    Nanomechanical response of a silicon specimen coated with a sp3 crystalline carbon coating (1.8 nm thickness) was investigated using MD simulation. A sharp conical rigid tip was impacted at the speed of 50 m/s up to a depth ...
  • Atomistic investigation on the structure–property relationship during thermal spray nanoparticle impact. 

    Goel, Saurav; Faisal, Nadimul Haque; Ratia, Vilma; Agrawal, Anupam; Stukowski, Alexander (Elsevier http://dx.doi.org/10.1016/j.commatsci.2013.12.011, 2013-12-31)
    GOEL, S., FAISAL, N.H., RATIA, V., AGRAWAL, A. and STUKOWSKI, A. 2013. Atomistic investigation on the structure–property relationship during thermal spray nanoparticle impact. Computational materials science [online], 84, pages 163-174. Available from: http://dx.doi.org/10.1016/j.commatsci.2013.12.011
    During thermal spraying, hot particles impact on a colder substrate. This interaction of crystalline copper nanoparticles and copper substrate is modeled, using MD simulation. The quantitative results of the impacts at ...
  • Anti-phase synchronization and symmetry-breaking bifurcation of impulsively coupled oscillators. 

    Jiang, Haibo; Liu, Yang; Zhang, Liping; Yu, Jianjiang (Elsevier http://dx.doi.org/10.1016/j.cnsns.2016.02.033, 2016-03-05)
    JIANG, H., LIU, Y., ZHANG, L. and YU, J. 2016. Anti-phase synchronization and symmetry-breaking bifurcation of impulsively coupled oscillators. Communications in nonlinear science and numerical simulation [online], 39, pp. 199-208. Available from: http://dx.doi.org/10.1016/j.cnsns.2016.02.033
    This paper studies the synchronization in two mechanical oscillators coupled by impacts which can be considered as a class of state-dependent impulsively coupled oscillators. The two identical oscillators are harmonically ...
  • An initial investigation of a nano-composite silica ceramic membrane for hydrogen gas separation and purification. 

    Nwogu, Ngozi Claribelle; Anyanwu, Emmanuel Enyioma; Gobina, Edward (Elsevier http://dx.doi.org/10.1016/j.ijhydene.2015.11.162, 2016-01-27)
    NWOGU, N.C., ANYANWU, E.E. and GOBINA, E. 2016. An initial investigation of a nano-composite silica ceramic membrane for hydrogen gas separation and purification. International journal of hydrogen energy [online], 41(19), pages 8228-8235. Available from: http://dx.doi.org/10.1016/j.ijhydene.2015.11.162
    The effects of trans-membrane pressure difference on hydrogen recovery are investigated on a preliminary basis. The membrane has been developed for high temperature hydrogen separation from CH4, N2, and Ar gas molecules. ...

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