By Monday Ochai
Engr. Sule Ahmed Abdulaziz, MD. TCN
The Transmission Company of Nigeria, TCN has announced that it has fully restored the nation’s electricity grid which suffered collapse crisis triggered by a sudden drop in system frequency to 47.21Hz on the 28th July 2021, after its technical team swung into action at about 12:20 pm the same day.
A press statement released from the office of the General Manager, GM (Public Affairs) Ndidi Mbah read that reports received from SCADA and other power generating stations showed that at about 12:20 pm, two generating units tripped in one generating station while four equally tripped in another generating station, causing a loss of 261MW and 350MW respectively, bringing the total loss of electricity on the grid to 611MW.
It is suspected that the sudden loss of 611MW from the grid, caused system instability and its eventual collapse.
After the collapse, however, TCN’s system operators immediately commenced the restoration of the grid and by 12:46 pm, power supply in Abuja was fully restored from Shiroro Generating Station. At 1:05 pm, TCN equally commenced grid restoration from the Delta Power Station, and at 4:59 pm, a full restoration of the entire grid was achieved.
TCN however expressed appreciation to the government, electricity customers nationwide, and international customer for their patience and noting that that the organization would continue to work hard to expand and maintain the stability of the national grid.