A generator delivers power through a transmission line to a star-connected load. The system is balanced. Find the values of the currents involved in per unit, considering: (a) single-phase bases and (b) three-phase bases. Datos: S₁ = 2 MVA Vg = 13.2 kV Generador ++ Linea Demanda Pg+jQg Uga ZLT a Zlinea 8.68+j3.162 Zcarga = 70+/10 la ZDa ZD b ZD€ Bases trifásicas: Ug b ZLT b Sb36 = 2 MVA Vb34 = 13.820° kV Ugo ZLTC

Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The load's impedance is Zload = 500 236.87° ohm, and the transmission line's impedance is Zline = 60 253.1° ohm. To reduce transmission line losses to 0.0103 of its losses without using the transformers design and use two transformers T1 between the generator and the transmission line and T2 between the transmission line and the load.

two generators supplying a load. Generator I has a no-load frequency of 62.5 Hz and a slope Sp1 of I MW/Hz. Generator 2 has a no-load frequency of 62.0 Hz and a slope sp2 of I MW/Hz. The two generators are supplying a real load totaling 2.5 MW at 0.8 PF lagging. (a) At what frequency is this system operating, and how much power is supplied by each of the two generators? (b) Suppose an additional I-MW load were attached to this power system. What would the new system frequency be, and how much power would Gl and G2 supply now? Generator 1 VT V2 Generator 2 VTí KVAR KVAR

The one-line diagram of a three-phase power system is shown in the above figure. The line impedances are in per- unit on a 100-MVA base, and the line admittances are neglected. Use Gauss-Seidel method in Matlab to analyze the system the tolerance of error is 10-3. Then anwser the questions as follows. V, = 1.05200 0.01+ j0.025 300 + j200 MVA 0.015 + j0.035 150 MW 200 +j150 MVA 0.01+ j0.03 |V = 1.03 The admittance matrix (Y_bus)? 0.02 + jo.04 0.0125 + jo.03 2.

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Two generators are supplying a load. Both the generators have a no-load frequency of61.5 Hz and the slope sp of 1 MW/HZ. If they are supplying a real load of 2.0 MW at 0.8 pflagging, what would be the system frequency and power sharing between two generators?What measures can be taken to make the frequency 60 HZ. If an additional 1.0 MW load isconnected to the existing one what would the system frequency be.

5.5 kW, 1450 rpm. L-type equivalent circuit and parameters for a continuous sinusoidal phase of a star connected 3-phase ASM with line voltage 220 V and frequency 50 Hz are given as follows, ignoring core (iron) losses: R1=0.21 Ohm, R2=-0.18 Ohm, X1=X2-0.66 Ohm and Xm = 9.9 Ohm How many times the inrush current will be the rated current when the ASM is started directly? Answer options group 8.0815 2.6455 4.3763 7.1534 1.2558 6.3414 5.2280 3.7473

A 3-phase generator possesses a synchronous reactance of 62 (line reactance between the source and the load) and the excitation voltage Eo = 3KV (source) per phase. Calculate the line-to-neutral voltage ELoad for a balanced resistive load of 8. Also, draw a phasor diagram between three-phase source and load voltages.

A single-phase motor draws 180 W at a power factor of 0.8 lagging when connected across a 240 Vrms, 60-Hz source. A capacitor is connected in parallel with the load to produce a unity power factor. Determine the required capacitance.    The required capacitance = ____ μF.

In the three-phase system shown in the figure, phase a is on no load and phases b and C are short-circuited to ground Ia = 0 In Ie The following currents are given: I, = 91.656 Z160.9° I, = 60.006 Z90° Find the symmetrical components of current 1,, I, and 1, .