General Discussion

I have a question regarding how to use a non-linear inductance to represent the transformer mag Z when using the BCTRAN model.  The BCTRAN documentation is not very clear on how to treat this situation.  The documentation says that the rated excitation value should be subtracted from the non-linear inductance curve.  I'm not quite sure what the author intended there.  Some clarification would be greatly appreciated.

Does anyone have any experience with using EMTP for transient recovery voltage analysis? I would like to have the ability to compare the resulting voltage profile (system response) with standard capability curves from a selection in a library. Any thoughts?

I would like to know what experiences users have with developing detailed complex control systems. In particular is there a way to initialize the controls blocks other than having to specify an initial condition for each individual block? This quickly becomes impractical as the controls model becomes more comlpex. Thanks.

Question:

I am doing a TRV study on a 345 kV reactor breaker. I noticed the EMTP example splits the reactor model in two.  Why is this?

Robert E Wilson

I want to gain confidence in my models of SiC arresters.  Does anyone have independent sources of information on this modeling in EMTP, or EMTP Version 3?

The IEC document 60071.4, named
"Insulation Coordination Part 4 - computational guide to insulation co-ordination and modelling of electrical networks", gives guidance on conducting insulation coordination studies. It proposes internationally recognized recommendations for :

• numerical modelling ;
• implementation of methods.

It includes examples.

Alain Xemard

Hello everyone,

Using EMTP in a batch mode for several case studies at once, i would like to know if that is also possible to do with the output result file. What i need is a way to get quickly (and automatically) a plot value directly stored in a file or wherever else, because trying to open the .mda file as a text file in order to scan for a particular value doesn't work (i have just read that it is written in a fortran-95 format, and i have no idea the way the binary data is stored - columns of x bytes ?).

All hints are welcome,

Dear EMTP users,

We are currently working on the next issue of the newsletter in which we hope to get good number of contributions from you about different type of studies the users are involved with. 

I hope to get your feedback and ideas on this matter.

As a student in power engineering, I find EMTP and Scopeview are good tools for simulation. I have a question about Scopview here. When I wanna export waveforms from Scopeview to jpg file, there is always a small note at the left-down corner, which is “EMTP-filename”.

How can I eliminate this note in Scopeview?