| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To continue stable operation by restraining the instability of an output voltage by a parallel resonance phenomenon due to a capacitor for harmonics current removal. <P>SOLUTION: This wind power equipment is provided with a wound-rotor induction motor 30 driven by a wind mill 10 and connected to a system 100; a converter 50 for secondary exciting; and a capacitor 61 for removing a harmonic current generated by the operation of the converter 50. To suppress parallel resonance composed of the capacitor 61 and system inductance, a resistor having the following value Rh is connected to the capacitor 61 in series: Rh=2ζ√(Xo/Yo), where Xo is system reactance [pu] seen from the induction motor 30 in the fundamental wave frequency of an output voltage of the wind power equipment, Yo is the susceptance [pu] of the capacitor 61 in the fundamental wave frequency, andζis an attenuation coefficient (approx. 0.01 to 0.03). <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
