The Transmission Company of Nigeria (TCN) has reported that the restoration of the national power grid, which collapsed at about 11 a.m on Wednesday was near completion.
A statement issued on Thursday by the company’s General Manager, Public Affairs, Ndidi Mbah, attributed the system failure “was a result of a sudden drop in system frequency from 49.94Hz to 47.36Hz, which created system instability”, adding that aggregate generation of 457mw was lost to the system collapse as it affected other grid-connected units in the plants.
Mbah stated: “Transmission Company of Nigeria (TCN) wishes to inform the general public that the national grid experienced system disturbance at about 11.27am today, 20th, July 2022. The incident was a result of a sudden drop in system frequency from 49.94Hz to 47.36Hz, which created system instability.
“According to reports obtained from the National Control Centre (NCC), it was precipitated by the tripping of a Unit (with a load of 106 MW) in one of the generating stations due to “exhaust over temperature.
“This unwholesome event, which pulled out other grid-connected Units in the plant, resulted in aggregated generation loss of 457MW. In its wake, 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.
“However, in-spite of setbacks encountered at the initial stage, grid restoration had almost been completed as at 11:00pm when this report was filed.
“The Nigerian electricity supply industry appreciates the kind understanding of government and consumers of electricity within and outside the country. We are committed to leveraging the concerted interventions instituted thus far to enhance power supply reliability so that the issue of system collapse will soon become a thing of the past”, she added.
It would be recalled that the national grid collapse on Wednesday was the seventh in a series this year, causing a blackout and affecting businesses and livelihoods nationwide.