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Why we recorded Zero megawatt – TCN




The Transmission Company of Nigeria, TCN, has attributed the nationwide system collapse when it had zero megawatts to a breakdown in tripping of Osogbo/Ihovbor and Ihovbor/Benin 330kV transmission lines, resulting in the loss of 201MW generation from Ihovbor power station.

The nation was thrown into blackout on Thursday at about 12.30 pm, lasting for over 3 hours.

The Management of System Operation/Market Operation (SO/MO) of the TCN, said in a statement Friday, that the generation and load imbalance that ensued, defined by sudden decline in system frequency, resulted in the collapse.

Read also: Youths protest one year power outage in Kaduna community

According to TCN statement, total grid generation at collapse inception was 3,196.0MW. The low generation at the time was due to shortage of gas supply to generators, adding that when generation is below 3,500MW, the transmission grid is open to system collapse, especially when the available spinning reserve capacity is low.

Continuing, the statement said: “TCN is working assiduously to consolidate the gains recorded in system stability,
which is evident from the substantial reduction of system collapses from 22 in 2013 to 9 in 2014 followed by 6 in 2015.

“A substantial number of these collapses are attributable to low system generation due to gas supply issues which impacts stability.

“The improvement in system stability is also evidenced by the fact that TCN has been able to wheel maximum energy of 109,372MWH on 2nd February, 2016 while the peak power transferred on the same day was 5, 074 MW.

“The System Operator, TCN regrets the inconvenience caused by the collapse.”

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