Calculate Load Angel & Pole Wheel Voltage Up

  • Thread starter Thread starter robax25
  • Start date Start date
  • Tags Tags
    Generator
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
4 replies · 2K views
robax25
Messages
238
Reaction score
3
Nominal power PN= 3MVA
Nominal Voltage UN= 3000v (Y)
Line frequency f=50 Hz
Number of ole pairs= 2
Synchronous Reactance X1= 2.5 ohms

There is no reactive power and the generator can be assumed as lossless.

Please calculate Load angel and pole wheel voltage Up

Formula and my solution,
I=PN/UN
I=3MVA/3000V
I=1000AUN=XI +Up
Up= 3000v-2.5*1000A
UP=500v which is wrong

Load angel ? I don't know
 
Physics news on Phys.org
In my opinion UN=V;UP=E. See the attached sketch.
 

Attachments

  • Synchronous Generator Steady State.jpg
    Synchronous Generator Steady State.jpg
    36 KB · Views: 229
Sorry.Wrong sketch.
 

Attachments

  • Synchronous Generator Steady State.jpg
    Synchronous Generator Steady State.jpg
    37.7 KB · Views: 244
I am sorry. Two more parentheses are missing
 

Attachments

  • Synchronous Generator Steady State.jpg
    Synchronous Generator Steady State.jpg
    39.7 KB · Views: 263
I am not sure what does represent UN=3000V[Y]. Since it is about 50 Hz IEC Standard IEC 60038 Table 3 Note 1:
These systems are generally three-wire systems unless otherwise indicated. The values indicated are voltages between phases.
So, the voltage is 3 kV between phases. The power has to be: √3.I.UN.cos(ϕ). The voltage per phase it is then 3000/√3=1732 V