TCN’s General Manager, Public Affairs, Ndidi Mbah, in a statement in Abuja on Sunday, said there was a partial disturbance of the grid at about 3.09 p.m. on Saturday.

She stated that operators commenced restoration efforts immediately after the incident, noting that “at about 9.57 p.m. on Saturday, the entire part of the grid that was affected was successfully restored.

“The system disturbance, which brings to three, the partial grid disturbances, with one total disturbance in 2024, is suspected to have been triggered by the unexpected tripping of three units of a power generating station.

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“It suddenly removed 313 Megawatts from the grid, causing system instability that led to the loss of bulk supply to a section of the national grid.”

Mbah stated that the system operator reacted to the sudden drop in generation which led to a dip in frequency.

She explained that the system operator did that by islanding a section of the grid which included the Ibom Power Station through which the company continued to feed Uyo, Aba, Itu, Eket, Calabar and others, even when the other section of the grid had no supply.

Source: NAN

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Mrs Ndidi Mbah, TCN General Manager, Public Affairs, said this in a statement made available to newsmen in Abuja.

Mbah said that the national grid experienced system disturbance at about 11:27a.m. on Wednesday, but that its restoration was almost completed as at 11:00 p.m.

“The incident was a result of sudden drop in system frequency from 49.94  Hertz (HZ) to 47.36Hz, which created system instability,” she said.

Hertz is a unit of frequency which replaces the earlier term of one cycle per second (cps).

Mbah said that reports from the National Control Centre, NCC, revealed that the collapse was precipitated by the tripping of a unit with a load of 106 Megawatts (MW) in one of the generating stations due to “Exhaust over Temperature”.

She said the tripping pulled out other grid-connected units in the plant, which resulted in aggregated generation loss of 457MW.

“A train of events ensued, culminating in the collapse of the national grid.

“As obtainable in all systems, when a component of the electric power system is defective, the entire configuration is vitiated,” she said.

Mbah said investigation was going on to establish the cause of the failure.

She said the Nigerian Electricity Supply Industry, NESI, appreciated the understanding of the government and consumers of electricity within and outside the country.

Mbah said that NESI was committed to leveraging on interventions instituted thus far to enhance power supply reliability.

Source: NAN

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The Acting Managing Director of TCN, Mr Sule Abdulaziz, made this known while addressing newsmen in Abuja on Wednesday.

Abdulaziz said the system which collapsed on Sunday evening was restored within 40 minutes of the incident.

He explained that the company immediately went into action and stabilised the system in Abuja, before other parts of the country.

According to him, there is nothing strange but it is normal for a system to collapse and that can happen in any country of the world.

“Since I came on board, we never had any system collapse and this one that happened on Sunday was restored immediately which is the fastest system collapse recovery.

“We are guarding the grid, we don’t want the system collapse to happen, but when it happens, the most important thing is what was done and how it was done to restore the system.

“In the last six months, there was no system collapse in the grid,” he stated.

He said that in his last few months in office, he had reorganised the company to ensure power stability.

Source: NAN

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