Re: Load shedding?
Well, yes, but this problem was essentially down to software.
The initial lightning strikes on the Barford-Little Wymondley transmission line caused a trip, these systems reset and were back on line in about 20 seconds and all should then have been well. However, the Hornsea wind farm's connector saw microsecond transients caused by the initial trip and reset, threw its toys out of the pram, and sulked. Little Barford went off line in various stages, and the 1.8GW of generation capacity that tripped out in total then caused the final load shed to prevent catastrophic frequency drops in the whole grid.
Hornsea have re-configured their system to be less pernickety, Newcastle Airport realised that they were not a protected customer and quickly asked to be so on the Monday after this happened.
Old-fashioned steam age electrical stuff is quite happy with things that take a few seconds to stabilise, clever fast sampling new wonderful stuff needs analogue and digital filtering to take account of transients, and people that can count to type in the correct limit frequencies in the traction control systems.