The Transmission Company of Nigeria (TCN) on Wednesday July 20 revealed why the national power grid collapsed for the sixth time this year.
This was included in a statement released by TCN spokeswoman Ndidi Mbah on Thursday, July 21.
Mbah said the collapse was caused by a shut down turbine that affected an entire Generation Company (GenCo) and caused a loss of 450 megawatts (MW).
The system malfunction occurred around 11:27 a.m. Wednesday and caused the system frequency to drop suddenly from 49.94 hertz (Hz) to 47.36 Hz, causing system instability.
Mbah further announced that despite the setbacks in the initial phase, the restoration of the grid was completed last night.
“As is the case with all systems, if one component of the electrical power system fails, the entire configuration is damaged.
“This unhealthy event, which pulled out other grid-tied units at the facility, resulted in a total generation loss of 457 MW.
A series of events followed, culminating in the collapse of the national power grid.
“In the meantime, a full investigation is being conducted to determine the cause of this error.”
