Power systen anaysis problems 1:15,1:22

[kduff70]

I was trying to work out two practice problem from Grainger and Stevenson power system analysis book and I cannot figure out how they can up with their solution for problem 1:15 and 1:22 . If any can help explain how they set up these two problems to solve would be a great help. Especially problem 1:22 I could see a problem possibly like this on the test. I have attach the problems

thank you for any help

 

[KatyLied P.E.]

Assuming someone else doesn't respond before then I will look at in depth later tonight. It looks like it might be a straightforward trig/triangle problem and the resistor and capacitor don't really mean anything but are designed to throw you off. That's based on a very quick look and I could be wrong.

 

[kduff70]

[SIZE=10.5pt]Thank you KatyLied I always appreciated any information you can give its always very helpful. [/SIZE]

PS and I like the pic of Shaft that a classic!!

 

[KatyLied P.E.]

Still working on the rest. Will get back with you ASAP. Got unexpectedly tied up last night. (My wife is getting into this bondage thing. LOL!)

 

[kduff70]

Hi KatyLied did you have a chance to figure out the problems

Only if you were able to come up for air of coures LOL!

 

[KatyLied P.E.]

apologies for my tardiness but can you email me a full sized copy of those problems. I am having trouble viewing but I'm unable to enlarge. I have an idea about how to work both but need to confirm the numbers and make sure I'm on the right track. I will message you my email address.

 

[BamaBino]

I said Problem 1.22 in your text but uploaded Problem 1.21.

Which one are you asking about?

 

[kduff70]

problem 1.22

 

[BamaBino]

Then post a copy of 1.22

 

[kduff70]

sorry the problem is 1.21 already posted

 

[BamaBino]

I can work 1.21 except I get the complex math at one point different than the given solution.

So I checked the solution's answer and it is correct.

Below is the check:



The magnitude of S is the same for Dig and Swing after the PF correction.

This is where I get the complex math wrong:



Please someone point out where my math is wrong.

@kduff70 It would help if posted a larger scan of the problem, this one is wrong to read.

 

[BamaBino]

This is my first attempt at 1.15 for sequence a-b-c

 

[BamaBino]

 

[kduff70]

thank you so much I need some time to really go over the steps I appreciate your time to work the problems out