Evaluation of a HVDC Interconnection to Improve the Voltage Stability of the Nigerian Transmission Network

Omowumi G. Olasunkanmi; Andrew R. Barron; Alvin Orbaek White; Grazia Todeschini

doi:10.37256/jeee.3120243799

Authors

Omowumi G. Olasunkanmi Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, UK https://orcid.org/0000-0002-4797-588X
Andrew R. Barron Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, UK
Alvin Orbaek White 1. Energy Safety Research Institute, Swansea University, Bay Campus, Swansea, UK; 2. TrimTabs Ltd, Swansea, UK https://orcid.org/0000-0001-6338-5970
Grazia Todeschini Department of Engineering, King's College London, Strand Campus, Strand, UK https://orcid.org/0000-0001-9411-0726

DOI:

https://doi.org/10.37256/jeee.3120243799

Keywords:

critical demand, reactive power margin (RPM), stability analysis, VSC-HVDC, PV analysis, QV analysis

Abstract

The Nigerian transmission network is prone to outages and low reliability, and both issues are currently impacting the population's quality of life and hindering economic development. This situation is expected to worsen in the future, due to the increase in forecasted demand. This paper assesses the stability of the Nigerian transmission network under existing grid conditions, and determines the impact of High Voltage Direct Current (HVDC) on voltage stability. The PV and QV analysis methods were carried out using the DIgSILENT PowerFactory software package. Two weak buses were identified, and an HVDC model was built and integrated into the existing network at these locations. The results demonstrated that the HVDC interconnector positively impacts system stability by improving the voltage profile and the reactive power margin (RPM).

Evaluation of a HVDC Interconnection to Improve the Voltage Stability of the Nigerian Transmission Network

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