I got parts C and D correct but can someone show me how to get these answers? I\

Question

I got parts C and D correct but can someone show me how to get these answers? I'm confused on the steps you have to take.

Problem 10.10 The load impedance in (Figure 1) absorbs 6 kW and generates 8 kVAR. The sinusoidal voltage source Figure 1 of 1 1000400 V (rms) Source Line Load Part C For Xemin value of line reactance, find the magnitudes of the total magnetizing vars developed and the total magnetizing vars absorbed Express your answers using three significant figures separated by a comma Qdel, Qabs 8000, 8000 VAR. Submit My Answers Give Up Correct Part D For Xemax value of line reactance, find the magnitudes of the total magnetizing vars developed and the total magnetizing vars absorbed. Express your answers using three significant figures separated by a comma Qdel, Qabs 1.24x104,1.24x10 VAR. 4 Submit My Answers Give Up Correct

Explanation / Answer

PART C

For lower values of XL. It basically acts like a short circuit. Since reistor and does not have VAR. So the net system var will be zero. ie the var absorbed will be equal to var delivered. So the VAR deleivered to load must be delived through inductor. Therefore absorbed VAR by system = delivered VAR by system = 8k VAR

PART D

We know that inductor for max value will absorb 1.24 x 104 VAR and deliver 4400 VAR. Thia VAR is transfered to load where it absorbed 4400 VAR and delivers (8 x 103 VAR +4400 VAR = 12400 VAR). So the system absorb 1.24 x 104 VAR and deliveres 1.24 x 104 VAR.

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