I assume this is referring to the description you get when you type help
caseformat and in Table B-3 in the manual
<http://www.pserc.cornell.edu/matpower/docs/MATPOWER-manual-5.1.pdf>. This does
not imply in any way that the values of r or x (or b for that matter) should be
zero for your transformer. The purpose of that description is simply to clarify
the sign convention for the TAP column, though I suppose to be strictly correct
it really read: if r = x = b = 0.
I’m open to suggestions for changes to the text that offer further clarity.
Ray
> On Aug 26, 2015, at 2:55 PM, Abhyankar, Shrirang G. <[email protected]> wrote:
>
> Yes, it is a typo. It should be r =b =0.
>
> Shri
>
>> On Aug 26, 2015, at 6:47 AM, "Vladimir Frolov"
>> <[email protected]> wrote:
>>
>> Dear Matpower community,
>>
>> My question is about tap coefficients. It is said in the data description
>> that branch includes transformer if r=x=0. But actually in cases r and b =0.
>> Is it misprint in data description or should I consider given values for x
>> as b.
>>
>> Best,
>> Vladimir
>>
>
>
