The Transmission Company of Nigeria (TCN) has cautioned that instability in the national grid may persist as critical repairs and upgrades are carried out following another collapse.
The grid failed once again on Thursday, marking the second blackout in just 72 hours, leaving much of the country without power.
In an update on the situation, Ndidi Mbah, TCN’s General Manager of Public Affairs, explained that the latest disturbance occurred around 11:29 a.m. and was triggered by a sudden surge in frequency from 50.33Hz to 51.44Hz due to issues at one of the substations.
“The frequency surge led to a precautionary shutdown to prevent further complications,” Mbah said, adding that restoration efforts began immediately, with power to the Abuja Axis restored within 28 minutes. Efforts to restore power to other regions are ongoing.
According to Mbah, TCN is engaged in extensive repairs on critical transmission infrastructure, including the 330kV transmission lines along the Shiroro-Mando axis, upgrades at the Jebba transmission substation, and work on the second Ugwuaji-Apir 330kV transmission line.
Following an investigation into previous grid collapses, TCN is addressing structural vulnerabilities identified in the report.
“These efforts include both technical upgrades and strategic interventions based on the committee’s recommendations,” Mbah stated.
However, she noted that some level of grid instability is likely until all major works are completed.
The company is also working to repair infrastructure damaged by vandalism, which has contributed to grid instability.
Mbah appealed for public patience and understanding during this period, emphasizing TCN’s commitment to securing long-term grid stability.
“Stable electricity supply is essential for Nigeria’s socio-economic growth, and TCN is taking all necessary measures to strengthen the grid and improve reliability,” Mbah added.
