Calculation of excitation system controllers to fulfill IEEE standard performance indexes

A method to calculate the controller parameters for excitation systems is proposed in this paper. The controllers are designed to accomplish the performance indexes recommended in the IEEE std. 421.2, which characterize the conditions for the excitation control system to achieve a desired performance. To simplify the design process for the power plant engineers, the controller parameters are calculated using expressions derived from a two-loop standard excitation system model in terms of performance indexes: phase margin, damping ratio, overshoot, and settling time. In addition, the proposed method guarantees the excitation control system stability, which together with the fulfillment of the performance indexes, ensures the safe operation of the generation unit. Finally, the controller design procedure is validated by means of simulation and experimental results.

► Ease-to-use design equations aimed for power plant and planning engineers. ► Visual tools are developed to synthesize the controller parameter calculation. ► Simulation and experimental results verify the proposed method.