Electricity supply on the National Grid has dropped to 3,200 megawatts following the industrial action by the Petroleum and Natural Gas Senior Staff Association of Nigeria (PENGASSAN).

The Nigerian Independent System Operator (NISO), in a statement yesterday, said the strike had disrupted gas supply to power plants, cutting available generation from over 4,300MW.

According to the agency, contingency measures have been activated to stabilize the grid, including strategic ramp-ups from major hydro stations, which have contributed an additional 400MW to cushion the shortfall from gas-fired plants.

“There are now real-time load adjustments to match available generation with system demand, while preventing a system frequency collapse,” the statement said. “Selective load shedding is being applied as a last resort to avert a system-wide collapse and ensure fair power distribution.”

NISO noted that the measures, including reactive power compensation and reserve monitoring, had minimized the impact of the strike, sustained operational security, and maintained supply to critical loads, thereby averting a nationwide blackout.

The agency reaffirmed its commitment to proactive grid management and adherence to global best practices to safeguard electricity supply across the country.