Microprocessor-based pole placer with minimum sensitivity for synchronous generator excitation control

A pole placer with minimum eigenvalues sensitivity is applied to the excitation and speed controls of a synchronous generator. This control scheme is based on an explicit parametric characterization of an observer-based controller that assigns an arbitrary self-conjugate prespecified set of closed loop eigenvalues. The class of assignable eigenvectors and generalized eigenvectors associated with the assigned eigenvalues is described by a set of free parametric vectors. Based on this parametric solution a design procedure is presented. A Z-80 microprocessor with the associated interfacing and memory elements has been used to implement the controller. The dynamics of a synchronous generator connected to an infinite bus system has been simulated experimentally using analog elements. The analog simulation can be applied in testing the controller under different operating conditions. A comparative study on the same simulated system using conventional excitation and speed controllers indicates that the proposed controller performance is superior to that of the conventional controller. Simulation results also indicated the superiority of the proposed controller for a wide range of changes around an operating point