CONSTRUCTION OF GENERATOR CAPABILITY A CURVES
construction of generator ca atcs ca atcs capability curves
construction of generator ca atcs ca atcs capability curves
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BASIC PRINCIPLES FOR THE DESIGN<br />
<strong>OF</strong> <strong>CAPABILITY</strong> CURVE<br />
• Vector diagrams of excitation currents of saturated machine<br />
• The curve of saturated machine, derived from no-load test, i f0 (e)<br />
• It is particularly difficult to quantify additional magnetic saturation on the<br />
part of the rotor of loaded d machine, i.e. . i fl = f(e l ).<br />
• Influence of additional saturation of the rotor magnetic circuit is taken into<br />
account by introduction of Potier reactance (x P >x l , x l is stator leakage<br />
reactance) which h results in increased EMF( (e P = u+x P·i<br />
> u+x+ l i = e l ).<br />
Figure 3: Magnetization curves i f0 (e) and i fl (e l ); diagrams of excitation currents: i fa,n = x d -x P and i fR<br />
fR =i fP +i fa,n
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