The Transmission Company of Nigeria (TCN) has declared that a rapid increase in frequency from 50.33Hz to 51.44Hz disrupted the national grid at approximately 11:29 a.m. on Thursday morning.
According to TCN’s official statement, the frequency increase was caused by technical challenges at one of its substations, which was shut down to avoid further complications.
“The frequency spike was caused by issues encountered at one of our substations, which had to be shut down to prevent further complications,” TCN stated.
According to the statement, immediate recovery efforts were initiated, allowing for partial restoration of the Abuja axis within 28 minutes. The company disclosed that “Recovery is still ongoing,” indicating that additional work is underway to stabilize the remaining affected areas.
n an effort to address these ongoing issues, the TCN revealed that significant repair work is already being conducted on critical transmission lines and substations.
These include:
Repair work is underway on the Shiroro–Mando 330kV Transmission Line to improve resilience along this route
Major upgrades at the Jebba Transmission Substation
Restoration of the second Ugwuaji–Apir 330kV Transmission Line
Following an investigative report on previous grid collapses, TCN is also implementing targeted improvements to address systemic weaknesses noting that both technical upgrades and strategic interventions are being applied based on the committee’s recommendations.
“Following the submission of the investigative report on the causes of previous grid collapses, we have begun addressing the identified weaknesses in the transmission system,” TCN stated
The TCN acknowledged that despite ongoing improvements, some instability will likely persist in the near term.
“It is important to note that while these repairs and improvements are underway, some degree of instability in the system is likely to persist until all major works are completed,” they noted.
TCN appealed for public understanding, recognizing the disruptions’ impact on daily life and economic activities.
“We acknowledge the impact of these disruptions and ask for the understanding and patience of the public during this challenging period,” the statement read.
