11 Dec 2023 - {{hitsCtrl.values.hits}}
By Kelum Bandara
With reference to the countrywide power failure, a top engineer said the transmission line from Kotmale to Biyagama which tripped due to a lightning strike was carrying about 500MW, while the total country’s demand was around 1500MW.
Spelling out technical details, he said the tripping of the line resulted in the loss of one-third of the supply, leading to a severe under-frequency below the limits tolerable by the other generators supplying the load. “Consequently, these generators also tripped, causing an island-wide blackout,” he said.
This is the main line transmitting power generated from the key Mahaweli reservoirs to the load centre in Biyagama.
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