Your model has no "prime mover". You need to have the IM running. Your simulation does not do this.

You have a torque (-1) input but a slip of 1 (zero speed) as the initial condition. Change slip to 0 (synchronous speed)

Also this is an ideal machine which does not model remnant flux in the iron core. This is required to develop a "back emf". You will have to replicate this by establishing a d/q-axis flux and can do so via initial conditions. Set the initial conditions to include an initial stator current say 1 amp [0,0,1,1,1,0,120,240].

Do the following

For your existing model just change the initial conditions to [0 0 1 1 1 0 120 240]

and set reference frame to stationary. You will see voltage build up as the electrical load is only 100W. You will see speed drooping. But it works.

You have a load of 100W and VAR of 400kVAr which is unrealistic.

After the above try the following

1 Set Series RLC load to 150kW (not 100W)

2 Set cap load to 40 kVAr (not 400kVAr)

3 Set load torque to -15 (not -1)

4 Set reference frame to stationary in ASM model.

5 set simulation time to 2 sec. (not 10)

6 set IM initial conditions to [0,0,1,1,1,0,120,240].

You should see motor begin to excite but speed will collapse. You need to design a small PI speed regulator which tries to hold the speed constant and acts as the prime mover. So long as you can maintain speed it will be stable and generate quite happily.

Once you have done this you can set the simulation time longer and the simulation will remain stable

Note that the model allows saturation to be simulated but does not model remnant flux. You are not using this feature but it will not work if you do.

The wind turbine and the induction generator (WTIG) are shown below. The stator winding is connected directly to the grid and the rotor is driven by the wind turbine. The power captured by the wind turbine is converted into electrical power by the induction generator and is transmitted to the grid by the stator winding. The pitch angle is controlled in order to limit the generator output power to its nominal value for high wind speeds. In order to generate power the induction generator speed must be slightly above the synchronous speed. But the speed variation is typically so small that the WTIG is considered to be a fixed-speed wind generator. The reactive power absorbed by the induction generator is provided by the grid or by some devices like capacitor banks, SVC, STATCOM or synchronous condenser.

sir thanks for a reply, I have been trying to run the induction machine by driving it above synchronous speed and adding capacitor bank, but the simulation is showing zero voltage, how to rectify that?

If you are working on SEIG, then for taking care of residual magnetism in rotor you have to provide a a very feeble rotor current in dq model.

@ Rakesh Srivastava - Thank you sir for the suggestion, sir can u please give me a demo matlab model for Induction Generator so that I can get an idea how to run it for generating a rated terminal voltage. It will be a great help sir...

We did this work somewhere in year 2000, and instead of using MATLAB software solved dq equations using RangeKutta method. If you are using MATLAB, as a black box, try developing yr own program using ode45 commands, it will have more learning value, rather than using inbuilt MATLAB features.

In my opinion, unless you relate experimental results with the theoretical result , it is half learning.

Work on SEIG, get exptl. results and verify using theoretical results.

@Rakesh Srivastava- thanks sir for your valuable inputs.

There are many demos in matlab simulink

@Noureddine- demo illustrates the operation of the asynchronous machine a Motor not as a generator.

Your model has no "prime mover". You need to have the IM running. Your simulation does not do this.

You have a torque (-1) input but a slip of 1 (zero speed) as the initial condition. Change slip to 0 (synchronous speed)

Also this is an ideal machine which does not model remnant flux in the iron core. This is required to develop a "back emf". You will have to replicate this by establishing a d/q-axis flux and can do so via initial conditions. Set the initial conditions to include an initial stator current say 1 amp [0,0,1,1,1,0,120,240].

Do the following

For your existing model just change the initial conditions to [0 0 1 1 1 0 120 240]

and set reference frame to stationary. You will see voltage build up as the electrical load is only 100W. You will see speed drooping. But it works.

You have a load of 100W and VAR of 400kVAr which is unrealistic.

After the above try the following

1 Set Series RLC load to 150kW (not 100W)

2 Set cap load to 40 kVAr (not 400kVAr)

3 Set load torque to -15 (not -1)

4 Set reference frame to stationary in ASM model.

5 set simulation time to 2 sec. (not 10)

6 set IM initial conditions to [0,0,1,1,1,0,120,240].

You should see motor begin to excite but speed will collapse. You need to design a small PI speed regulator which tries to hold the speed constant and acts as the prime mover. So long as you can maintain speed it will be stable and generate quite happily.

Once you have done this you can set the simulation time longer and the simulation will remain stable

Note that the model allows saturation to be simulated but does not model remnant flux. You are not using this feature but it will not work if you do.

@Gregory Diana- Thank you sir for your excellent input, now my simulation runs. Your input has helped me to take my work ahead. I will work on the PI speed regulator so as to avoid the drooping rotor speed characteristic.

Sir, I want to know, why are we changing the reference frame to stationary in our simulation ?

The reason is that the internal d,q quantities are at stator frequency. In the rotor reference frame they will be at slip frequency and in synchronous reference frame they will be DC.

It will not make any difference to the stator voltages and currents you see in the load but I did this just to see whether the internal machine and external load quantities correlate. Just look at the voltage output from the IM model and you will see how they differ in each reference frame. Try it will make no material difference.

Also do some research on the level of capacitor required to cause excitation there are several available.

 The -1 value is in pu but the generator is in SI system. This change might help. A similar model is with me. 

Refer AC machine by MG Say.

For SEIG 

You need to determine Xm parameter at synchronous speed, for getting actual value of capacitance needed. 

Instead of using MATLAB model develop your own dq0 MATLAB model. Here run the machine at certain speed. For specifying the condition of residual magnetism , you have to keep idr and iqr currents roughly 0.001 A or so. 

I  have the same problem, I have model Induction generator model in simulink but the result us not good. But I am confuse how to calculate Xm also the input speed?? Please need your guys help

I have modeled from the attached paper

Mubarak Shah you need to send the parameter file.

There are many constants like wl,c r ,R. Rs,Rr etc missing

Please check your Inbox sir

My main confusion is parameters, so please help me to adjust parameters

Best regard

Dear Gregory Diana

Thanks for your response, attached is m-file for my SEIG model

@Gregory Diana How can I connect the PI regulator? Do I need to modify the Asynchronous Induction Machine block or is there another way? 

Thanks in advance.

Amit Kumar Roy

hi,

could you please send me the correct model of induction generator that you have designed.

thanks