[scilab-Users] transmission line demo

[Doug Stewart]

Masoud NAJAFI wrote:
> Hi,
> It works on my machine. The proof is attached!

But try adding more blocks.

> Any way, in fact, I think there should be problem with Scicos when the 
> number of blocks is very high (I'm not sure, I should try to increase 
> the number of blocks).
>
> And about your model, you would better create a new Modelica block in 
> which you use "for loop" instead of using so many superblocks.
> I'm currently very busy, next week I'll try to send you a block for 
> transmissio line with N RLC modules.
>
I understand what you said. But one of my objectives is to let the 
students  visualize  the
 line and  measure  the voltage and current at different points along 
the line.

We derive and use all the formulas (sinh  and cosh) for long lines. What 
I am making is a demo to show the reflected  wave and that it is 
inverted at a short
and non inverted at an open  etc.

Thanks for your help

Doug Stewart

PS  This is a 60 Hz power course  not High frequency.  We will be 
looking at fault currents and lighting strikes.

  



> Masoud
>
>
> Simone Mannori <Simone.Mannori at inria.fr> a ?it :
>
>> On Fri, 2008-02-29 at 12:16 -0500, Doug Stewart wrote:
>>> While learning Scicos (and scilab)  I found a limit that I don't 
>>> understand.
>>>
>>
>> Hi Stewart,
>>
>> you are right, there is a problem.
>>
>> I'm not sure if is a "cached" bug or just a memory allocation problem.
>> When the diagram is bigger that a fixed limit, the Modelica compiler
>> crash. On my PC the simulation runs OK up to 40 blocks.
>>
>> I'm sure that Masoud will diagnose and fix the problem faster than me.
>>
>> Thanks for the communication :)
>>
>> Best Regards
>>
>> Simone Mannori - Scilab/Scicos Embedded Applications Eng.
>>
>>> See the attached file.
>>> If I add one or more   blocks to the transmission line then it gives me
>>> an error message
>>> about a compiler.
>>>
>>> Is there some reason that we are limited to 90 blocks?
>>
>>
>
>
>