Power system stabiliser for large disturbances
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An adaptive stabiliser that supplements the excitation control signal of a synchronous machine is presented in this paper. A pole-shifting algorithm that radially shifts the poles towards the origin is described. Also, because of the nonlinear characteristics of the synchronous machine, the algorithm is modified such that the system identification is turned off for a short period following the onset of a severe disturbance. Both simulation and experimental results show that the proposed algorithm gives a consistently improved performance, particularly during large disturbances.
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