ECONOMYNEXT – Sri Lanka’s Ceylon Electricity Board has appealed to rooftop solar owners to switch off their systems from April 13 to 21 to help maintain grid stability and avoid cascading failures.
“Due to the extended holiday period and sunny weather, national electricity demand has plummeted to historic lows, while very high Variable Renewable Energy (VRE) contribution is placing an extraordinary stress on the national grid,” the CEB said in a statement.
“As a result, the grid inertia has critically reduced, leaving it highly vulnerable to sudden disruptions.
“Even a minor fluctuation could trigger partial outages or a nationwide blackout.”
Exports of rooftop solar to the grid cannot be centrally controlled at the moment, and CEB system controllers also do not now the volume of solar available.
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With cheaper solar technology, several other countries are also facing similar problems, and are now encouraging self-consumption with limited exports to the grid.
The Australian Energy Market Operator has sought ’emergency backstop’ powers to shut off rooftop solar in case there are serious imbalances.
READ MORE: AEMO says emergency powers to switch off solar needed in every state amid ‘system collapse’ fears
Large plants, especially hydro and gas turbines can absorb shocks to the system by slowing their rotation.
Solar power, expands domestic value added (GDP), compared to thermal power, but more investments are needed in the network, including in batteries to reduce intermittency in power.
Private solar power firms have said they can give battery backed solar power (like dispatched thermal plants) at around 50 rupees a unit.
Sri Lanka CEB has been cash strapped due to a failure in economic regulation amid currency depreciation from to flexible high inflation targeting which has made it difficult to pay renewable and other independent power producers.
The Asian Development Bank is ready now to finance the CEB to upgrade the grid, provided costs reflective tariffs are allowed by the regulator.
(Colombo/Apr13/2025)