ECONOMYNEXT – Sri Lanka’s power grid was hit by a cascading failure which the state power utility said left that left the entire island without electricity late morning Sunday.
“We are making all efforts to restore supply after the the blackout which hit the entire country,” the CEB said in a statement.
“We apologize to customers.”
The statement did not give a reason, but solar power has led to grid instability (so-called Sunny day blackouts) in the past as had transmission line failures and tripping of large coal plants.
However tripping generators were not to blame for in this instance, utility sources said.
One source in inquiry is a line failure by a troop of monkeys, another source said.
Sunday is a low load day, but there is strong sunlight between 1000 and 1400 hours, which makes it difficult for system control to maintain frequency, and can lead to a cascading failure after one section of the grid fails for whatever reason, industry analysts say.
The grid also fails as attempts are made to re-energize the grid.
In a 2020 power failure, the engineers able to restore the grid fully only after the sun went down as frequency surged up above 51 kHz as attempts were made re-energize the grid.
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Cash-strapped CEB which was denied tariff increases till an economic crisis has earlier said large investments to the grid are needed to expand renewables which cannot be centrally controlled.
CEB said around 4.30 pm Sunday that 80 percent of the grid was restored. Earlier reports said the Ministry of Energy requested rooftop solar users to switch off their equipment till 4.00 pm.
(Colombo/Feb09/2025)