Mbah stated that the system operator reacted to the sudden drop in generation which led to a dip in frequency. The Transmission Company of Nigeria (TCN) says the national grid was restored at about 9.57 p.m. on Saturday after a partial collapse.TCN’s General Manager, Public Affairs, Ndidi Mbah in a statement in Abuja on Sunday, said there was a partial disturbance of the grid at about 3.09 p.m. on Saturday. She stated that operators commenced restoration efforts immediately after the incident, noting that “at about 9.57 p.m. on Saturday, the entire part of the grid that was affected was succes…