Sri Lanka power grid in total cascading failure
ECONOMYNEXT – Sri Lanka’s power supply operated by state-run Ceylon Electricity Board was hit by a cascading failure cutting off power country-wide and restoration of the grid was progressing in stages, an official said.
The trigger for the cascading failure was not yet known, an official said.
A power can be hit by a cascading failure due to a failure in a section of the transmission, network or a generator.
Restoration may take several hours, engineers said.
While a cascading failures spreads through the system in minutes, as parts of the grid trip and generators also trip as demand disappear, its takes longer to re-start generators and restore power.
Emergency shut downs of coal plans in particular can lead to ruptured diaphragms in boilers which may take days to replace.
Nation-wide failures are not common in Sri Lanka. Sri Lanka was hit by country-wide power grid failure in 2016.
There have been total grid failures in 2008 and 2009. (Colombo/Aug17/2020)