1. In a control system for distributing the regulating burden of a power system among a plurality of generators when said plurality of generators includes both fast and slow responding units and control of the regulation is carried out with an integrating unit control having an integrating element responding to a unit error signal which represents a predetermined part of the area control error, the improvement in each of the unit controls for the slow responding unit comprising: means responsive to a variable of the power system at the unit level for producing an anticipatory feedback signal indicative of the change in generation of the unit that will occur when the unit has responded fully to the integrating control to reduce the unit error signal toward zero; and means for introducing said anticipatory signal into the control system on the input side of the integrating element to provide the anticipatory response required to prevent improper control action.