A coordinated-control scheme with a feedforward compensator for a fossil-fuel power plant is presented. The compensator is intended to reduce the interaction effects among the control loops to ease control during wide-range operation. Placed between the controllers and the power plant, the compensator only introduces compensation factors among the control signals; preserving the direct control loop paths of the original control scheme. The compensation factors can be determined from an equivalent process gain matrix. Analysis shows that the proposed compensation is numerically well-conditioned, and simulation experiments show that it effectively handles control loop interaction throughout the power plant operation range.