Fig. 3From: A matrix-perturbation-theory-based optimal strategy for small-signal stability analysis of large-scale power gridRotor frequency deviations after improving system stability: a 1-st order sensitivity MPT, b 2nd-order sensitivity MPT. The Figure show that rotor frequency deviations after the system is disturbed by disturbance of 10% power load. System stability has been improved by two kinds of re-dispatchBack to article page