Short Circuit Analysis of Benin Sub-Region 132 kV Transmission Network for Distance Protection Scheme

Transmission lines have modern interconnected elements that help in fast decision making and tripping time of the relay during fault conditions. The conventional distance protection scheme is gradually becoming unreliable in handling the delay in the diverse relay trips due to its inability to protect the zones of protection of transmission lines adequately, the drive for this research. In this paper, a short circuit analysis of the Benin sub-region 132 kV Transmission Network was carried out. The network comprises of Benin Transmission mains connecting Irrua 132 kV transmission line through Ajaokuta town 132 kV transmission line terminating at Itakpe 132 kV transmission bus were considered as the first layer of the network. The second layer of the network connecting Oghara 132 kV transmission line through Amukpe 132kV transmission line terminating at Ughelli 132 kV transmission bus. This network was modelled using Neplan software to determine three-phase short circuit current. The result from this study provides an improvement opportunity in the application of distance protection scheme as currently being experienced.