The Transmission Company of Nigeria
(TCN) said a total system collapse of the national grid was recorded
on Sept. 28 at 8:03 p.m., resulting in temporary loss of electricity
generation.
A statement from TCN’s management on Friday in Abuja
said that reports obtained from power stations and the sequence of
events generated by the Supervisory Control and Data Acquisition (SCADA)
had revealed the cause of the collapse.
It said the SCADA
system report indicated that the system collapse was triggered by the
tripping of Egbin power plants Units ST4, ST6 and ST5.
It, however, said that restoration of grid system had also commenced at 8:22 p.m. on Sept. 28.
According
to the statement, a post mortem analysis of the issue indicated that
grid generation was curtailed to about 4,262.7 Mega Watts (MW) before
the disturbance.
It explained that the capacity under-utilisation
and the operational capability required to maintain grid stability,
which had waned, made the grid system vulnerable.
It said the
vulnerability and disturbance of the system resulted in severe system
frequency dip that culminated in the system collapse.
It further
revealed that the analysis conducted clearly showed that there was
insufficient level of rotating reserve provided by grid-connected
generation companies arising from low tariffs for providing ancillary
services.
It said TCN had filed an application to the Nigerian
Electricity Regulatory Commission (NERC) for an extraordinary tariff
review to avert further occurrence of such incident.
It said the
proposal for a tariff review would ensure that Generation Companies
(GENCOS) were given the necessary incentives to provide sufficient
spinning reserves and other ancillary services critical for managing
the national grid.
“TCN hereby solicits for the understanding of
all Nigerians as it continues with efforts to provide the electricity
industry with a world class national grid.
“It will strive to
ensure that the stride attained recently in frequency control is
sustained in line with world industry standards and codes,“ the
statement further stated.
Blackout: Nigeria’s National Grid Collapses
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on
October 01, 2017
Rating: 5
The Transmission Company of Nigeria
(TCN) said a total system collapse of the national grid was recorded
on Sept. 28 at 8:03 p.m., resulting in temporary loss of electricity
generation.
A statement from TCN’s management on Friday in Abuja
said that reports obtained from power stations and the sequence of
events generated by the Supervisory Control and Data Acquisition (SCADA)
had revealed the cause of the collapse.
It said the SCADA
system report indicated that the system collapse was triggered by the
tripping of Egbin power plants Units ST4, ST6 and ST5.
It, however, said that restoration of grid system had also commenced at 8:22 p.m. on Sept. 28.
According
to the statement, a post mortem analysis of the issue indicated that
grid generation was curtailed to about 4,262.7 Mega Watts (MW) before
the disturbance.
It explained that the capacity under-utilisation
and the operational capability required to maintain grid stability,
which had waned, made the grid system vulnerable.
It said the
vulnerability and disturbance of the system resulted in severe system
frequency dip that culminated in the system collapse.
It further
revealed that the analysis conducted clearly showed that there was
insufficient level of rotating reserve provided by grid-connected
generation companies arising from low tariffs for providing ancillary
services.
It said TCN had filed an application to the Nigerian
Electricity Regulatory Commission (NERC) for an extraordinary tariff
review to avert further occurrence of such incident.
It said the
proposal for a tariff review would ensure that Generation Companies
(GENCOS) were given the necessary incentives to provide sufficient
spinning reserves and other ancillary services critical for managing
the national grid.
“TCN hereby solicits for the understanding of
all Nigerians as it continues with efforts to provide the electricity
industry with a world class national grid.
“It will strive to
ensure that the stride attained recently in frequency control is
sustained in line with world industry standards and codes,“ the
statement further stated.
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