Abdelghaffar Amoka: The Scholar Reviving High Voltage research in Nigeria
Dr. Abdelghaffar Amoka Abdelmalik is an Abusite and senior Lecturer in the Department of Physics, Ahmadu Bello University (ABU) Zaria who is striving to revive high Voltage research in the university to serve Nigeria’s “ailing” power industries.
Dr. Abdelghaffar Amoka Abdelmalik who is currently a Senior Lecturer in ABU Zaria obtained both his Bachelor of Science (BSc) and Masters of Science (MSc) in Physics from ABU Zaria and a Ph.D. in High Voltage Engineering from the University of Leicester, UK.
Through his contributions and dedication, the department now has a brand new 400 kV HVDC Laboratory that has been put in place to give the team a relatively good working environment for research in the new lab as well as other Labs in the Materials Science Laboratories.
His area of research is in the field of “dielectrics”, a multi-disciplinary area incorporating Physics, Electric Power Engineering, and Chemistry. It considers the effects of electric fields on the properties of materials for high voltage insulation. Dr. Abdelghaffar Amoka Abdelmalik’s work has been centered on six principal areas:
- Properties of engineered insulation materials,
- The integrity of high voltage insulation system in the power system,
- Electrical ageing, degradation, and breakdown in the insulation system of power equipment,
- The measurement and study of partial discharges (PD) in the power system
- Reliability studies of power equipment, and
- “nano-dielectrics” – i.e. dielectric materials made from nanocomposites.
In a pioneering work during his postdoctoral fellowship in Norway (2013-2015), Dr. Abdelghaffar Amoka Abdelmalik authored works on optical PD study of the insulating system under fast transient voltage – an area in which work is still on to develop a suitable technique for PD study on converters, transformers, penetrators under fast-rise voltage.
On his return home in 2015, he started looking at the possibilities of reviving high Voltage research in ABU to serve our “ailing” power industry, an effort that led to the establishment of the HV materials Lab in the department. The department currently has an ongoing project on the Reliability Model for Safe Operation of Oil-filled Power Equipment in Nigerian Electricity Grid Network.
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The 400 kV HVDC Laboratory is currently open for all who want to have a look at as well as to postgraduate students and others who want to collaborate and develop solutions for our emerging power industry.
Post Doc work
PhD Abdelghaffar Amoka Abdelmalik completed his Post Doc work according to plans by August 2015.
In his work he has focused on developing test and characterization techniques for dielectric liquids, and studies of feasibility of liquids as insulation medium for power semiconductor components. Insulation breakdown experiments have been performed of liquid insulation candidates in the pressure range 1-100 bar under various voltage stress situations, including voltage waveforms representing power semiconductors in switch mode operation.
Publications from the Post Doc work:
- A. Abdelmalik, “Insulation for power electronics for subsea application,” NTNU, Postdoctoral research report, 2015.
- A. Abdelmalik, A. Nysveen, and L. Lundgaard, “Partial Discharges in Narrow Gaps on Power Electronic Converter,” in IEEE CEIDP 2014, Conference on Electrical Insulation and Dielectric Phenomena Des Moines (USA), 2014.
- A. Abdelmalik, A. Nysveen, and L. Lundgaard, “Influence of fast rise voltage and pressure on partial discharges in liquid embedded power electronics,” IEEE Transactions on Dielectrics and Electrical Insulation, vol. 22, pp. 2770-2779, 2015.
- A. Abdelmalik, M.D. Borge, A. Nysveen, L.E. Lundgaard and D. Linhjell, “Statistical Analysis of Dielectric Breakdown of liquid insulated Printed Circuit Boards”, IEEE Transactions on Dielectrics and Electrical Insulation, vol. 23, pp. 2303-2310, 2016
- A. Abdelmalik, A. Nysveen and L.E. Lundgaard, “Partial Discharges in Liquid Embedded Power Electronics: Effects of Pressure and Liquid Nature under Negative Pulse Voltage Stress”, IEEE Transactions on Dielectrics and Electrical Indulation, vo. 23, pp. 1119-1125, 2016
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