Synopsis : ' Fig '

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Fig. 7 (a-b) show the real and imaginary parts of the rotor voltage respectively for all operating wind speeds. As shown in Figs. 7(a) and 7(b), increasing of DFIG stator lead reactive power, increases the real and imaginary part of rotor voltage which supplied by the rotor converter. Increasing DFIG stator lag reactive power, decreases the real part of rotor voltage in all speed range, increases the imaginary part of rotor voltage in sub-sunchronous speed range and decreases the imaginary part of rotor voltage in super-sunchronous speed range. Figs. 8(a-c) show the generated stator, rotor and total active powers respectively. Total active power is identical to the estimated power curve in Fig. 2. Fig. 9 shows the stator reactive power while the rotor reactive power is taken from the DC bus system. The RSC has large size with the lead power factor (Qs= -1.6 MVAR), otherwise, all lag power factors have smaller RSC size. The stator current is shown in Fig. 10.a, the maximum stator current is obtained at maximum stator reactive power both lag and lead. On the other hand, the minimum stator current is obtained at stator unity power factor. On the other side, as shown in Fig. 10.b, the maximum rotor current is obtained at maximum stator lead power factor, but the minimum rotor current is obtained at stator magnetization i.e. the DFIG magnetization is achieved through the stator terminals, in this case at (Qs= 0.6 MVAR). 6. Artificial Neural Network Controller Artificial Neural
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