System collapse: TCN to maintain Calabar, other power lines

The Transmission Company of Nigeria (TCN) is shopping for contractors within the next 42 days to maintain two of its transmission lines spanning Odukpani near Calabar in Cross River State, and Alaoji in Abia State.

Daily Trust investigation last weekend identified those lines as key points for system disturbances or collapses. The national grid comprising several networks of transmission lines has recorded 206 system collapses between 2010 and July 2019.

In a tender published on Monday, the public utility company said it is using its Internally Generated Revenue (IGR) to pay for the comprehensive maintenance of the two power lines.

Then first is a 330 kilovolt (kV) line stretching for 144 kilometres from Alaoji (Abia) through Ikot Ekpene (Akwa Ibom) where there is a huge switching station built by the Niger Delta Power Holding Company (NDPHC), to Odukpani (Cross River). The line evacuates generated energy from the 500 megawatts (MW) NIPP power plant in Odukpani to the national grid.

The second line is a 132kV line covering a 179 kilometre distance from Yenagoa (Bayelsa) through Ahoada (Rivers), passing through Owerri (Imo) to Alaoji (Abia) from where the about 560MW Alaoji NIPP is evacuated.

The company will work to tackle key defects that include line trace clearing to aid vegetation control, erosion control and corrosion control. The tower numbering aspect of the maintenance will focus on replacing missing tower members, signs and the other tower accessories.

The firm is also seeking contractors to re-conductor (replace lines) 132kV transmission lines in Lagos. Using its newly adopted GAP conductors, TCN said the project will execute the re-conductoring of Ikeja West-Alimosho-Ogba-Alausa-Otta transmission lines.

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