- #1
Ivan Antunovic
- 111
- 4
Homework Statement
In sinusoidal circuit shown in Figure 13 is known : w =10^6 1/s, R = 100 Ohm ,
L = 300μH , C1 = 10nF and C2= 5nF . Reactive power of coil inductance L is QL = 3kVAr ,
RMS value of the voltage receiver impedance Z is UZ = 100 V , and the voltage UZ phase delaying behind
electricity generator Ig for pi / 2. Calculate the complex apparent power S of that generator.
Homework Equations
The Attempt at a Solution
I set current source at angle 0. Ig = Ig exp( j*0) = Ig
By compensation theorem , I replaced impendance Z with ideal voltage source Ek =Uz exp(-j*pi/2) = -j100 V
From QL = IL^2 * XL , I get IL = sqrt(QL/wL) = sqrt(10) A.
Using node voltage method
I get result from the picture.
The problem is that there are too many unknowns (2 equations and 3 unknowns) , well I got RMS value of IL but I still don't know it's angle.
I am pretty stuck at this point.