Eskom says three of those power stations, Camden, Duvha and Matla, have been on a sustained upward trend as a result of a reduction of plant breakdowns and the return to service of a number of units that were on unplanned breakdowns.Eskom says three of those power stations, Camden, Duvha and Matla, have been on a sustained upward trend as a result of a reduction of plant breakdowns and the return to service of a number of units that were on unplanned breakdowns.