Robust nonlinear synchronous generator excitation system: integral adaptation

The application of a new system-cybernetic approach to the power system synchronous generator control with regard to their nonlinearity, multidimensionality, and multicoupling, is shown. The main study subject is a nonlinear model of the synchronous generator operating for a high power network. A synergistic synthesis procedure of the nonlinear adaptive control law for power system synchronous generator excitation in accordance with the principle of the integrated adaptation of synergetic control theory is presented. The synthesized control law provides the implementation of technological invariants, i.e. stabilization of terminal voltage, and a synchronous operation with the network, suppression of parametric perturbation (parametric robustness). The obtained results have shown their efficiency in improving power system stability problem. A comparative analysis of the stability area with the synergistic law, and with the conventional synchronous generator excitation controller has illustrated the significant advantage of the synergetic approach.