The stabilizer system is designed to damp most electromechanical oscillations. The stabilizer output is supplied to the excitation system, so it has an effect on the field voltage during transients. The block diagram of the stabilizer is shown in Figure 5 - 11. The stabilizer inputs are Pe or Pef (filtered electric power) and x (gate opening). For Hydraulic machine, the filtered electrical power Pef is used, calculated in the speed regulator. For steam turbine machine, the electrical power Pe is used with no filtering.
Generic Stabilizer Block Diagram