Coordinated Multi-Machine Stabilizer Settings Without Eigenvalue Drift

The stabilizing requirements for various mechanical mode oscillation frequencies are explored for a thermal unit, anuclear unit and a hydro unit of a portion of an operating system by means of a complex frequency method. The dynamic interaction effects between various modes of the machines are found to have significant influence on the stabilizer settings of the machines, and are therefore included in the computation of the mechanical mode eigenvalues of the machines as equivalent damping and synchronizing torque coefficients.