Electricity Transmission is the bulk movement of electrical energy from a generating plant to an electrical substation. The interconnecting 330kV and 132kV transmission lines which facilitate this movement are known as transmission networks/grid. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The NDPHC's transmission development plan amongst others comprises power evacuation and grid expansion/enhancement.


The NIPP transmission projects were majorly awarded in 2006. These projects include transmission substations and lines. As at May 2016, the overall completed 330kV transmission line is 1336.9KM (against contracted 1634.4KM) representing 82% completion. Completed 132kV transmission line is 405.5KM (against contracted 719.3KM) representing 56% completion. In addition, the overall completed 330/132kV transmission substation capacity is 3810MVA (against contracted 6000MVA) representing 64% completion, while completed 132/33kV transmission substation capacity is 1920MVA (against contracted 3100MVA) representing 62% completion.


The following transmission substations and lines have been completed and energized:

  • 1x150MVA, 330/132kV Ihovbor substation (Lot 19-2A) - energized 11th March 2016
  • 132kV Ihovbor substation line bay (Lot 19-1B) - energized 11th March 2016
  • 132kV DC Ihovbor - Okada transmission line (Lot 19-4) - energized 11th March 2016
  • 2x40MVA, 132/33kV Okada substation (Lot 19-1A) - energized 2nd April 2016
  • 2x60MVA, 132/33kV Agbor substation (Lot 8-B) - energized 15th March 2016


Some key challenges faced in the execution of transmission line and substation projects are:

  • Multiple demand for wayleave compensation by communities and claimants
  • Recalcitrant EPCCs
  • Slow pace of work by some EPCCs
  • Unresolved court cases and injunctions
  • Multiple litigations

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