• TCN blames ‘sudden drop in system frequency’ for latest grid collapse


‘Seun Ibukun-Oni, Agatha Chitumu, Abuja


The national grid has once again experienced system failure, resulting in a nationwide power outage.


The grid had as of 10 am on Monday generated about 3,712MW of electricity from 21 Generation Companies (GenCos) before it dropped to 0MW one hour later.


According to the information from the System Operations, a section of the Transmission Company of Nigeria (TCN), only Afam IV was on the grid, but with zero supply as of noon.


On Sunday, the highest volume of electricity generated was 4,100MW and the lowest was 3,652MW, with the frequency hovering between 49.04 Hertz (Hz) and 50.34Hz.


Since July 1, consumers said power supply had increased in their various areas.


For instance, the Abuja Electricity Distribution Company (AEDC) recently confirmed an increment in its daily allocation to over 500MW from the actual 300MW it had distributed before then.


Although the national grid had not crossed 5,000MW, DAILY COURIER observed that the level of load rejection, especially around the DisCos’ networks, had dropped significantly with some customers entitled to a five-hour supply, recording over 12 hours daily.


The Nigerian Electricity Regulatory Commission (NERC) had attributed the improvement in power supply nationwide to the partial activation of contracts that seek to hold sector operators liable for deliberate incompetence.


The national grid collapsed twice in July and in August, but it was quickly restored and power supply improvement was sustained before the latest system collapse on Monday.


According to records, this is the seventh system collapse this year, much more than the three recorded last year.


Meanwhile, the Transmission Company of Nigeria, TCN, has blamed sudden drop in frequency for the latest collapse of the national grid.


TCN in a statement by its General Manager, Public Affairs, Ndidi Mbah confirmed that the grid collapsed at 10.51am on Monday.


Mbah said: “The Transmission Company of Nigeria (TCN) wishes to inform the public that the national grid experienced partial system disturbance at about 10.51am today, 26th, September 2022.


“The incident was a result of a sudden drop in system frequency, which created system instability. The restoration of the affected part of the grid commenced immediately at 11.55am with Osogbo/Ihovbor back to the grid followed by Jebba/Osogbo, Kainji/Jebba, Benin/Onisha, Shiroro/Kaduna, Shiroro/Katampe, and Alaoji/Ikot-Ekpene. Others are Lokoja/Gwagwalada, Odukpani/Ikot Ekpene, Benin/Omotosho, Oke-Aro/Ikeja west, Egbin/Oke-Aro and Kaduna/Kano.


“The National Control Centre (NCC) said a full-scale investigation is being conducted to establish and ascertain the cause of the partial disturbance as this unwholesome event has resulted in aggregated generation loss.


“However, grid restoration is almost completed and the Nigerian Electricity Supply Industry (NESI) regrets any inconveniences caused and appreciates the kind understanding of electricity consumers within and outside the country.


“We are committed to leveraging the concerted interventions instituted so far to enhance power supply reliability so that the issue of system disturbance will soon become outdated”.


Some DisCos, including Kaduna Electric, Enugu, and Kano. had already communicated the nationwide outage to their customers, noting that efforts were ongoing to restore supply.