Application of Fuzzy-PI controller on water turbine generator set

The water turbine generator set has the characters of non-linearity, parameter time-variability and non- minimum phase. After researching on PID speed controller of water turbine generator set, it is found that PID controller has the problem of integral saturations and poor robustness. To improve the running state, Fuzzy-PI controller has been put forward in this paper which combines fuzzy control and PI control effectively. It can self-modify the parameters of PI controller online according to the fuzzy control rules which can improve the self-adaptation and the robustness of the regulator of the hydroelectric generating set. After simulation on example of the water turbine generator set regulator, it is proved that Fuzzy-PI controller has favorable self-adaptive ability for time varying system.