PRIMARY CONTROL SYSTEM AND STABILITY ANALYSIS OF A HYDROPOWER PLANT

The objective of this work is to study the primary control system of a hydropower plant operating isolated. The plant is modeled by differential equations and the results are compared with field data from an actual hydropower plant, with deviations lower than 1.0%. The study of the primary control system is conducted in order to define optimal parameters for the controllers. Four controllers are studied: traditional, PI, PID and PI-PD. The controllers’ performances are evaluated by stability criteria and a performance index. For the hydropower plant studied, the PI controller has the best performance.