Describe what you mean by the DC Jacobian? I’m assuming you are talking about
sensitivities of power injections to voltage angles? That would be the Jacobian
of the DC power flow equations. Since the equations are linear, the Jacobian is
simply the matrix of linear coefficients of the voltage angle vector, in other
words Bbus.
If it is a different “Jacobian” you are trying to find, please define what it
is and maybe we can help.
Ray
> On Apr 16, 2018, at 10:25 PM, naimeahmadi <[email protected]> wrote:
>
> yes, but Bbus is totally different with my jacobian.
>
>
>
> Sent from my Samsung Galaxy smartphone.
>
> -------- Original message --------
> From: Saeed Ahmed <[email protected]>
> Date: 4/17/18 11:12 AM (GMT+09:00)
> To: MATPOWER discussion forum <[email protected]>
> Subject: Re: DC State estimation in matpower
>
> Did you try this function for calculating the H Matrix ....
>
> [Bbus, Bf, Pbusinj, Pfinj] = makeBdc(mpc.baseMVA, mpc.bus, mpc.branch);
>
> Regards
> Saeed Ahmed
>
>
> On 13 April 2018 at 23:09, Saeed Ahmed <[email protected]
> <mailto:[email protected]>> wrote:
> The best i can do is to share a code with you... This code estimates the
> power flow using AC estimation criteria...
> You have to modify it according to your needs for DC state estimation ...
> When you have any progress let me know... you have to try and don't give up...
>
>
>
> Regards
> Saeed Ahmed
>
>
> On 13 April 2018 at 11:44, naime ahmadi <[email protected]
> <mailto:[email protected]>> wrote:
> Thank you.
> I want to calculate DC jacobuian matrix in matpower.
> When I compare DC jacobuian matrix with Bbus, it is totally different.
> How can I calculate DC jacobuian matrix ?
>
> On Tue, Apr 10, 2018 at 11:41 PM, Ray Zimmerman <[email protected]
> <mailto:[email protected]>> wrote:
> If you are looking for the sensitivities of power injections w.r.t. changes
> in voltage angle, that would be the Bbus matrix from equation (3.32) in the
> User’s Manual
> <http://www.pserc.cornell.edu/matpower/docs/MATPOWER-manual-6.0.pdf> which is
> returned from makeBdc()
> <http://www.pserc.cornell.edu/matpower/docs/ref/matpower6.0/makeBdc.html>.
>
> Ray
>
>
>> On Apr 10, 2018, at 5:04 AM, naime ahmadi <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Thank you.
>> Actually I read that chapter. My problem is getting DC Jacobian matrix from
>> matpower.
>> Does j11 be the DC Jacobian matrix?
>> mpc=loadcase('case14');
>> [j11,j12,j21,j22,J, Ybus, Yf, Yt] = makeJac(mpc);
>>
>>
>>
>>
>> On Mon, Apr 9, 2018 at 7:26 PM, Saeed Ahmed <[email protected]
>> <mailto:[email protected]>> wrote:
>> Hi Ahmadi...
>>
>> First you need to understand the DC or linear State Estimation . You can
>> find Chap 2 of Ali Abur's Book.
>> After that you can use the built-in functions in MATPOWER for the
>> formulation of H vector and this all becomes simple once you have solid
>> understanding of theory...
>>
>> Regards
>> Saeed Ahmed
>>
>>
>> On 9 April 2018 at 15:46, naime ahmadi <[email protected]
>> <mailto:[email protected]>> wrote:
>> Hi,
>> How can I use matpower to calculate DC state estimation?
>> Kind Regards,
>> Naime
>>
>>
>
>
>
>
