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 />
• Capability ity curve of generator e with unsaturated sauaed<br />
magnetic cc circuit<br />
cu<br />
• Generator is sized to reach the nominal<br />
temperature at the rated values of (p n ) and (q n )<br />
powers (the point R) i.e.:<br />
• for induct currents, i a = i an = Const.,<br />
φ ≤ φ n ,<br />
and<br />
• curve i f = Const. . and φ > φ n , i.e., q ≥ q R , with a<br />
reduced active power p ≤ p R<br />
Figure 2: Vector diagram of generator electromotive forces and the<br />
excitation currents (with corresponding scaling ratio)