Not entirely the same thing. 'Load shedding' in South Africa has effectively been scheduled blackouts of entire metropolitan areas, including the major cities, to avoid a grid meltdown and to allow for plant repairs.

It's caused by too many plants being poorly-maintained and breaking down and insufficient investment in new power plants caused by corruption and incompetence. In other words, not regular localised reductions or transfers of load, but the same wide scale forced blackouts as being discussed elsewhere in this thread.

There has, thankfully, been no load shedding over the past few months, but only because the economy has slowed down sufficiently that the country's electricity demand has dropped below its regular levels.