Excitation Voltage Response Definitions and Significance in Power Systems [includes discussion]

Abstract

{x-(a, COS X-C)} 2+{y y(a, sin X+b)} 2 =b2+C2-d2 (9) Here, (b2+c2-d2) is a constant. Consequently, equation 8 defines a circle with center at (a, cos X-c)+j(al sin X +b) and a radius given by Vb2+C2 -d2 Such an impedance circle is shown in Fig. 4, where 0 is the origin, and D the center of the circle.The operating point corresponding to a particular value of 0 may be determined as follows: Determine the point C such that the vector OC is given by aleix. Draw a straight line E2'CE2 through the point C, making an angle 0 with the positive direction of j as shown in Fig. 4, the angle o being reckoned positive if CE2 leads the positive j direction in the counterclockwise direction. The vector OE2 then gives the operating point corresponding to aiejX+j{(b cos 0+c sin 0)+ V,(b cos 0+c sin 0)2 -d2}e3O while the vector OE2' corresponds to aiej -+j{(b cos 0+c sin 0)-V(b cos 0+c sin 0)2 -.d2}e'G In Figs. 5 and 6, current and conjugate impedance loci for the stator and the rotor respectively of the test machine are shown. In both these figures operating points for a few values of a are shown; the point C' being the conjugate of the point C previously mentioned.

Dynamic analysis of Southern Africa power pool (SAPP) network

“…The only drawback on the voltage source controlled rectifier is mainly the offsetting by its virtually instantaneous response and high post-fault field forcing capability and recommended for interconnected power systems such as SAPP grid [81,82]. Despite the voltage source controlled rectifier takes time to respond when regulating already high voltage.…”