Hello,
I want to solve the optimization function for calculating voltage.
As a constraint, I need to calculate each bus's minimum and maximum values
of real and reactive power injection.
here is the calculation:
Pfe=branch(:,PF)/baseMVA;
Qfe=branch(:,QF)/baseMVA;
Pte=branch(:,PT)/baseMVA;
Qte=branch(:,QT)/baseMVA;
P_inj_max = Pfe+0.05*Pfe;
P_inj_min = Pfe-0.05*Pfe;
Q_inj_max = Qfe+0.05*Qfe;
Q_inj_min = Qfe-0.05*Qfe;
Is this way correct?
Kind regards,
Naime
On Tue, Oct 11, 2022 at 1:45 PM naime ahmadi <naimeahm...@gmail.com> wrote:
> Thank you for your time
>
> On Tue, Oct 11, 2022 at 7:14 AM Carlos E Murillo-Sanchez <
> ce.murillosanc...@gmail.com> wrote:
>
>> Slight correction:
>>
>> Sf = V( mpc.branch(:, F_BUS) ) .* conj(Yf * V);
>> St = V( mpc.branch(:, T_BUS) ) .* conj(Yf * V);
>>
>> carlos.
>>
>> Ray Daniel Zimmerman wrote:
>>
>> In matrix form, you can do the corresponding calculations as follows
>> (e.g. for case9):
>>
>> define_constants
>> mpc = loadcase('case9');
>> [Ybus, Yf, Yt] = makeYbus(mpc);
>> V = mpc.bus(:, VM) .* exp(1j * mpc.bus(:, VA)*pi/180);
>> Sbus = V .* conj(Ybus * V);
>> Sf = V .* conj(Yf * V);
>> St = V .* conj(Yt * V);
>>
>> Here Sbus are the bus injections into the branches (equal to the
>> generation – load), and Sf and St are the branch power flows at the
>> *from* and * to* ends, respectively.
>>
>> Ray
>>
>>
>>
>> On Oct 10, 2022, at 1:41 AM, naime ahmadi <naimeahm...@gmail.com> wrote:
>>
>> I have forgotten to attach the picture.
>>
>>
>> On Mon, Oct 10, 2022 at 3:40 PM naime ahmadi <naimeahm...@gmail.com>
>> wrote:
>>
>>> Hello,
>>> I have a question regarding equations (2) and (3) in the attached
>>> picture.
>>> I am not sure equation (3) is correct. But *sj* is the power injection
>>> and *f{i,j}* is the power flow.
>>> I am a littel bit confused, how should I calculate y*{j,k} and * Yjk*
>>> in Matpower?
>>> According to the attached picture y*{j,k} is line adminance vector and
>>> Yjk bus adminance matrix. How can I calculate them from Ybus?
>>> Thank you,
>>> Naime
>>>
>> <Capture.JPG>
>>
>>
>>
>>
