Matlab/Simulink self-excitation for induction generator

[greg997]

Hi,
I am doing a project and part of it is to simulate a self excitation of the induction generator. I know that it needs capacitors in order to receive reactive power. So I added a load block with capacitive power only. And there is no current nor voltage in the circuit. Why? What am I doing wrong? What is missing? Any rules for values of capacitor? Any hints/ suggustions are welcome.

 

[SirAskalot]

It might be that there aint no remanence in the rotor and thus no rotating magnetic field to induce a voltage.

Try to set a initial voltage on the capacitors, it will then start as a motor. Or see if the dialog box for the induction generator have an option for remanence.

And don't Earth the neutral of the capacitor bank.

 

[greg997]

Hi, what i did to to set stator currents to 1 in initial conditions. I have not found remenance options and I was not able to set voltage across capcitors. I notice that currents are unbalaced and out of phase, I guess. It works but not as expected. What can I do?

 

[greg997]

I have managed to make it work properly. I had to set phase angle in initial conditions to 0 120 and 240.

 

[milosz125]

Hello

I have the same problem. I cannot run self-excitated induction generator...

I put initial motor currents =1A and initial motor angles 0,120,240

But still doesn't work


Please help me

below attached print-screens:

layout and data
voltage and currents plots

Greets;)

 

[greg997]

Hi,

The way I solved my problem was not a correct one. I found out later. What you have to do is add one synchronous generator, connect it somewhere. Then in the powergui block you run Load Flow and Machine Init. Then you set the synchronous generator as the swing bus, and for the induction one you set the power. Remember to update. And that's all, I think then you can disconnect and remove the synchronous generator. Hope it helps. good luck

 

[milosz125]

Hi,

The way I solved my problem was not a correct one. I found out later. What you have to do is add one synchronous generator, connect it somewhere. Then in the powergui block you run Load Flow and Machine Init. Then you set the synchronous generator as the swing bus, and for the induction one you set the power. Remember to update. And that's all, I think then you can disconnect and remove the synchronous generator. Hope it helps. good luck

Hello Greg. Thank you for your reply.

I will follow your tips and try what will happen.

But I have a question: necessity of use of synchronous generator in that simulation means that I cannot simulate stand alone induction generator?

Greets;)

 

[greg997]

Hi,
Like I said, you need the synchronous one only when starting the induction generator for the very first time. Then you do not need it any more. I have heard that in old Matlab version it was not necessary to initialize the generator, it just worked. If you still don't have voltage then play with capacitors, increase or decrese the capacitance.That should work. Let me know how it went.Good luck

 

[abypatel]

Hi,
I am doing a project and part of it is to simulate a self excitation of the induction generator. I know that it needs capacitors in order to receive reactive power. So I added a load block with capacitive power only. And there is no current nor voltage in the circuit. Why? What am I doing wrong? What is missing? Any rules for values of capacitor? Any hints/ suggustions are welcome.

Hi did u get this one workng by any chance? I've the same one for m assignment.

 

[mahloboac]

hi guys am also doing a project on self-excited induction generator but i cannot seem be getting it alright in MATLAB/Simulink it just give me wrong results please help,I have calculated the size of excitation capacitors correctly but it does not seem to work on Simulink,please help

 

[hasan123]

Could you please tell me how did you calculate the capacitor of self excited induction generator?

if anyone have a model for this project. please share it with me
I have the same project also. If you still have your model please let me know

 

[montasir]

Hi,
Actually I have the same project SEIG please help me by the model of it