test case for starting of CIMTR3 as induction machine

25 ●5 ●6 ●9

Hello,

I want to simulate starting of induction machine, CIMTR3 using PSS/E. In this way, I have made a simple test-case (attached) and the scenario is to change the status of the CIMTR3 from OFF to ON at t=1sec using the following code:

psspy.machinedata2(i=1, id='1', intgar1=1)

Note: time step=0.001 sec.

I am able to successfully run this test-case with in python, but I see oscillation in TELEC & QMOTOR of CIMTR3 which seems to me as numerical issue probably caused by bad data.

image description

In this way, does anybody have any good test-case for starting of CIMTR3 machine or can anybody help me to modify the attached data to have numerically stable results without any oscillations?

Attachments:

net.raw.jpg

dyn.dyr.jpg

Note: To have the data, please replace *.jpg extension with *.raw for the first file and with *.dyr for the second one.

Thanks,

Arvin

add a comment

answered Sep 24 '16

perolofl

3452 ●1 ●9 ●20

I am wondering about your setup in the test system. There is one synchronous generator of 100 MW, 100 MVA. H=5. There is no governor control or voltage control. You are starting a asynchronous generator with rating 100 MVA with 5 MW turbine power. H=3. That is, the induction generator is of the same size as the system it is started against!

Your test system is extremely weak and cannot start such big asynchronous generator. The generator will act as a motor until nominal speed is reached.

Result: When the asynchronous generator is started from stand-still the voltage collapses to about 25%! Try with a stronger system, i.e. increase the rating of the synchronous generator!

Comments

Thanks, Yes the problem is exactly what you have mentioned. I decreased the rating of induction machine to 1MVA and now everything is fine.

Arvin (Sep 26 '16)

add a comment

test case for starting of CIMTR3 as induction machine

1 answer

Comments

Your Answer

Question Tools

Stats

Related questions