First, the state estimation code in MATPOWER is contributed code that is not a
supported part of the main MATPOWER functionality. So, all I can do is point
you to the included documentation and suggest you follow up with the original
author Rui Bo if you have questions.
I would start by checking out the contents of the extras/se directory in
MATPOWER. In particular, you’ll want to have a look at the se_intro.pdf
document there that describes the code.
Having said that, I think that with regards to your first question, the
voltages at the slack and PV buses will (and should) remain at their set points
specified in col VG of the gen matrix. Also, you can remove a line by setting
it’s BR_STATUS column in the branch matrix to zero.
Ray
> On Oct 14, 2017, at 4:05 AM, Afsaneh Faraji <[email protected]> wrote:
>
> Hello,
>
> I hope all is well with you.
>
> I have 3 questions about Matpower SE package and I would be so grateful if
> you could help me in this regard. Sorry for the number of questions.
>
> 1) When I change the input measurements of the SE for 14 bus and make them
> random with the standard deviation of 20%, still, most of the estimated
> voltage magnitudes are rather the same. For example, the value of bus 1 is
> 1.06 always and others just change a little. As another example, one just
> changes in this interval [1.04,1.05]. Others are the same. But the voltage
> values can be [0.95,1.05] as I know ([0.94,1.06] in Matpower setting). I also
> noticed that the power flow with random load values also can't change the
> voltage values reasonably and the voltage values are constant. I run 10000
> times. Where is the problem?
>
>
> 2) How can I use a different type of measurements? I want to change the
> available measurements and do SE based on some flow measurements and also
> injection measurements but the existing available measurements are
> generations, flow measurements, and voltage measurements. Most of the papers
> use flow measurements and injections as available ones.
>
> 3) How can I simulate an outage (line, etc.) in this estimation code?
>
>
> Thank you very much for your help and time.
>
> Best Wishes,
