October 1, 2022

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Nigeria’s electrical energy grid suffers over 200 system collapses in 10 years


Evaluation of trade knowledge — largely from the Nigerian Electrical energy Regulatory Fee (NERC) — from January 2010 to September 2021 confirmed that the grid suffered 216 system collapses.

It added that data regarding the crashes was not formally accessible from September 2021 to June 2022. The grid collapsed in February, Could, July, and August 2021.

Final month, it skilled collapse for the seventh time in 2022.

Evaluation of the info confirmed that in 2010, Nigeria skilled 42 whole and partial crashes; 19 in 2011; 24 in 2012 and 2013, respectively; 13 in 2014; and 10 in 2015.

In 2016, the variety of instances rose to twenty-eight; it got here to 21 in 2017; 13 in 2018; 11 in 2019 and 4 in 2020.

“As a background, the nationwide energy grid, a community of electrical energy transmission strains connecting producing stations to hundreds throughout all the nation, is designed to function inside sure stability limits when it comes to voltage (330kV+5 per cent) and frequency (50Hz+5 per cent). Every time the grid operates out of those stability ranges, it turns into unstable; energy high quality decreases and results in wide-scale provide disruptions, leading to grid collapse and blackouts,” the report reads.

“Whereas sustaining a secure grid frequency of 50Hz requires a sustained steadiness between the quantity of electrical energy fed into the electrical energy grid and the quantity of electrical energy off-taken by end-users since it’s not economically optimum to retailer electrical energy in giant portions over an extended interval, the System Operator (SO) ensures that the frequency is sustained always inside a tolerance threshold.

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“When provide exceeds demand, {the electrical} frequency will increase, and in excessive instances some energy vegetation which can be unable to tolerate extreme frequency variation might shut down, thereby inflicting a sudden drop within the accessible technology on the grid. This exacerbates the frequency imbalance, probably resulting in a full/partial system collapse.