The Transmission Company of Nigeria (TCN) has announced restoration of the national power grid.
The State Affairs NG reported partial system disturbance at about 1.06pm on Monday, 23rd August 2021.
According to a statement by TCN’s General Manager (Public Affairs), the Monday incident was due to sudden drop in system frequency from 50.18Hz to 47.63Hz that caused system instablity and consequently the collapse of a part of the national gnd.
It stated that the partial system disturbance did not affect parts of the grid such as Afam Complex, Alaoji, Ikot Ekpene, Odukpani, and Calabar axis. The TCN stated that electricity supply to the areas was not interrupted by the incident.
The statement read in parts:
According to reports from the Supervisory Control and Data Acquisition (5CADA) readings and some substations, control panel readings by System Operators showed that some units from a particular generating station tripped suddenly causing an iniial loss of 402 megawatts (MW) from the grid network. This caused a destabilizing imbalance, which further caused the pulling out a total of 3,560MW from the grid that finally collapsed part of the national grid.
TCN commenced the immediate recovery of the grid at 1:19pm through Shiroro Generating Station and almost immediately restored electricity to Abuja axis. The Alaojí – Onitsha axis was restored at about the same time as Abuja, while the Shiroro Mando axis, on the other hand, was restored by 3.42pm. By 6.57pm yesterday, the national grid was fully recovered and operational.
TCN appreciates the kind understanding of government and electricity consumers within the affected areas and notes that it is consistently executing projects geared towards putting in place a very robust grid. It is equally pursuing a nationwide SCADA implementation that would further contribute to grid stability.