By David Onuoja, Abuja
The Transmission Company of Nigeria (TCN), has restored the Benin–Egbin 330kV transmission line) following a voltage instability that disrupted power supply to Lagos and its environs on Thursday, June 25, 2026.
According to TCN’s General Manager, Public Affairs, Ndidi Mbah, the national grid experienced voltage instability at about 8:19 a.m. The incident spread rapidly across the Lagos corridor, leading to the loss of some generating stations, transmission line outages, and a cut in electricity supply to Lagos.
TCN said the National Control Centre responded swiftly by directing several generators to reduce output. This, it said, arrested a rise in frequency, stabilized the system, and prevented further disruption to the national grid.
The Minister of Power, Chief Joseph Tegbe, also convened an emergency meeting with the heads of TCN and the Nigerian Independent System Operator (NISO), immediately after the incident, to coordinate restoration efforts.
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In an update, TCN said the Benin–Egbin 330kV line, which was opened during the incident, has been restored and is now transmitting bulk electricity.
“A combined team of TCN engineers from Benin and the Omotoso sub-region is working assiduously to rectify the remaining faults on the 330kV Benin–Omotoso line to ensure full restoration of bulk power supply to the Lagos axis as quickly as possible,” the statement said.
TCN regretted the inconvenience caused to residents, businesses, and other electricity customers in the affected areas. It assured consumers that the Ministry of Power and relevant agencies are working to complete repairs on the remaining line.
“Our goal is to stabilize and strengthen the national grid and minimize a recurrence of such incidents,” TCN said.
“We urge affected consumers to exercise patience as we work to restore bulk power supply through the Benin–Omotoso transmission line. Updates will be provided as restoration progresses,” it added.
