Impact of a HVDC Link on the Reliability of the Bulk Nigerian Transmission Network

Omowumi Grace Olasunkanmi, Waliu O. Apena, Andrew R. Barron, Alvin Orbaek White and Grazia Todeschini ()
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Omowumi Grace Olasunkanmi: Energy Safety Research Institute, Swansea University Bay Campus, Swansea SA1 8EN, UK
Waliu O. Apena: Department of Computer Engineering and Department of Electrical and Electronics Engineering, Federal University of Technology, Akure 340110, Nigeria
Andrew R. Barron: Energy Safety Research Institute, Swansea University Bay Campus, Swansea SA1 8EN, UK
Alvin Orbaek White: Energy Safety Research Institute, Swansea University Bay Campus, Swansea SA1 8EN, UK
Grazia Todeschini: Energy Safety Research Institute, Swansea University Bay Campus, Swansea SA1 8EN, UK

Energies, 2022, vol. 15, issue 24, 1-16

Abstract: Regular and reliable access to energy is critical to the foundations of a stable and growing economy. The Nigerian transmission network generates more electricity than is consumed but, due to unpredicted outages, customers are often left without electrical power for several hours during the year. This paper aims to assess the present reliability indices of the Nigerian transmission network, and to determine the impact of HVDCs on system reliability. In the first part of this paper, the reliability of the Nigerian transmission system is quantified by building a model in DIgSILENT PowerFactory and carrying out a reliability study based on data provided by the Nigerian transmission-system operator. Both network indices and load-point indices are evaluated, and the weakest points in the network are identified. In the second part of the paper, an HVDC model is built and integrated into the existing network at the locations identified by the reliability study. A comparative study using two different HVDC connections is then carried out, to determine the critical impact of HVDC on system reliability. The reliability results indicate that the weakest points of the transmission system are the radial feeders, and the highest impact could be achieved by spanning an HVDC line between two busbars located at the two extremes of a radial feeder: Azura and Yola.

Keywords: load-point indices; reliability; VSC-HVDC; transmission network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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