Self tuned Fuzzy-PI based reactive power compensation in wind-diesel hybrid system

Self tuned Fuzzy logic based PI controller is developed in this paper to regulate the reactive power of a decentralized wind-diesel hybrid power system under different disturbance conditions. The study incorporating small signal analysis has been taken. The linearized model of wind, diesel is used where IEEE Excitation system (type-1) with synchronous generator is taken into account. Due to the abrupt load changes and sporadic nature of wind, reactive power and voltage stability problem occur. For the above problem, a Auto tuned Fuzzy Logic PI (STFLPI) controller is designed, which automatically tunes the coefficients of PI controller (KP and Ki). From Simulation it shows that the proposed controller attains the steady state value with less settling time and overshoot for a wide and unpredicted load changes and thereby proves it´s superiority.