Many works have been focused on the MPPT control of W TS.Some of them used linear techniques, and as it was stated before, these controllers can render a poor system performance. Other researches have used the perturb and observe or hill-climb
searching technique, like [13] for instances. The main advantage of this technique is that it does not need the model of the system, however, these controllers have to be tuned conservatively in order to guarantee the system stability under different operation condi-tions; it causes that the system works on a suboptimal operation point most of the time. Different authors have faced the MPPT problem neglecting the generator dynamics and using the electrical torque as an actual control variable, see Refs. [2,6]. Some works
have been proposed that claim the achievement of certain control objectives like those on [14 e17 ]; but not theoretical stability analysis is given. In Ref. [18] , the authors proposed a sensorless robust control scheme of variable speed wind turbine systems us-ing the optimal torque control method. See the references therein for others related control work s. In Ref. [19] , the authors proposed a standard passivity based controller (SPBC) that takes into account the generator dynamics, and asymptotic stability of the equilibrium point was proved. That controller works well under slow variations
in the wind input signal.
Many works have been focused on the MPPT control of W TS.Some of them used linear techniques, and as it was stated before, these controllers can render a poor system performance. Other researches have used the perturb and observe or hill-climbsearching technique, like [13] for instances. The main advantage of this technique is that it does not need the model of the system, however, these controllers have to be tuned conservatively in order to guarantee the system stability under different operation condi-tions; it causes that the system works on a suboptimal operation point most of the time. Different authors have faced the MPPT problem neglecting the generator dynamics and using the electrical torque as an actual control variable, see Refs. [2,6]. Some workshave been proposed that claim the achievement of certain control objectives like those on [14 e17 ]; but not theoretical stability analysis is given. In Ref. [18] , the authors proposed a sensorless robust control scheme of variable speed wind turbine systems us-ing the optimal torque control method. See the references therein for others related control work s. In Ref. [19] , the authors proposed a standard passivity based controller (SPBC) that takes into account the generator dynamics, and asymptotic stability of the equilibrium point was proved. That controller works well under slow variationsin the wind input signal.
การแปล กรุณารอสักครู่..