Trouble adding short TLine for ENI
Hi there,
I am trying to split a large case into parts to use the ENI feature. In doing this I am adding a transmission line where there is not actually one but using a very short length so the impedances are negligible. However, when I try and run this case I keep getting the message that the time step is too long because the transmission line constants are very short. How can I use the ENI feature without adding a signficant transmission line to my case?
Thanks in advance,
Patrick
Status:
Open Sep 01, 2018 - 07:05 PM
ENI, Tline
1answer
Answer
Sep 02, 2018 - 06:26 PM
You have to reduce the time stpe. Time step must be smaller than a time a travelling wave should require to arrive from sending end of transmission line to the receiving end.
A general estimate of propogation velocity i.e. 3*10^8 m/s can be used to choose suitable time step.
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