The Transmission Company of Nigeria (TCN) says it lost an
aggregate generation of 457mw to the system collapse as it affected other
grid-connected units in the plants.
At about 11 am on Wednesday, Nigeria’s electricity grid
collapsed for the sixth time in 2022, causing a blackout and affecting
businesses and livelihoods across the nation.
The incident occurred 38 days after the national grid
suffered a system failure on June 13.
In a statement issued on Thursday by Ndidi Mbah, general
manager, public affairs, TCN, the company said the system failure “was a result
of a sudden drop in system frequency from 49.94Hz to 47.36Hz, which created
system instability”.
It, however, said grid restoration was near completion.
“Transmission Company of Nigeria (TCN) wishes to inform the
general public that the national grid experienced system disturbance at about 11.27am
today, 20th, July 2022. The incident was a result of a sudden drop in system
frequency from 49.94Hz to 47.36Hz, which created system instability,” TCN said.
“According to reports obtained from the National Control
Centre (NCC), it was precipitated by the tripping of a Unit (with a load of 106
MW) in one of the generating stations due to “exhaust over temperature”.
“This unwholesome event, which pulled out other
grid-connected Units in the plant, resulted in aggregated generation loss of
457MW. In its wake, a train of events ensued – culminating in the collapse of
the national grid.
“As obtainable in all systems, when a component of the
electric power system is defective, the entire configuration is vitiated.
“However, in-spite of setbacks encountered at the initial
stage, grid restoration had almost been completed as at 11:00pm when this
report was filed.
“The Nigerian electricity supply industry appreciates the
kind understanding of government and consumers of electricity within and
outside the country. We are committed to leveraging the concerted interventions
instituted thus far to enhance power supply reliability so that the issue of
system collapse will soon become a thing of the past.”
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