ELE 806 Midterm: ELE806 Winter 2013 Midterm Solutions
31 Jan 2019
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A 690v (line-to-line), four-pole, 60hz squirrel-cage induction generator (scig) is used in a fixed-speed wind energy system as shown in fig. The generator has the following parameters: rs = 0. 001 ohms, rr = 0. 0012 ohms, xls = xlr = 0. 01885 ohms, and xm = All the rotor parameters are referred to the stator side. When the rotor speed of the generator is 1810rpm, the total impedance zs is. Z s: (5%) the rms stator current si and rotor current ri. 1-1 a fixed-speed wind energy system and equivalent circuit of scig. No aids other than basic calculators and one formula sheets are permitted. (2) answer all four questions. You must show your steps and derivations clearly to be awarded part marks for your answer. (3) if in doubt on any question, clearly state your own assumptions. The synchronous speed: ns n s s n r n s.
