Hi,
This may be helpful
1.* First question: *I* think opf means to optimize objective function
value, evaluate Pg, QG and so on. Is this point of view correct??*
You are right, opf involves calculating Pg, Qg etc values, however, the
simple meaning of opf is to calculate the values of Pg, Qg, losses and/ PL,
QL (if load is variable) which gives the minimum value of objective
function.
*2. Second, if objective function can change, matpower evaluate
parameter(e.g.
Pg,Qg) with change objective function??*
While the objective function value changes, the objective function remains
the same, it is the individual values of Pg, Qg etc. which changes as long
as their combination gives a minimum value.
*3. Third, I think polycost.m is written objective function. Is this
objective function cost(objective function = c0 + c1 * Pg + c2 * Pg^2) ??*
Yes it is, we can even extend to include =c0 + c1*Pg +....+ cn*Pg^n. this
conforms to the idea of *poly*, such that we on;y enter the coefficients in
the case.
Hope this is helpful.
Regards,
Fred.
On 4 September 2013 08:07, Kazuhiro OKABE <[email protected]>wrote:
> Hello,
>
> I have three questions about OPF with objective fuction.
>
>
> First, I think opf means to optimize objective function value, evaluate
> Pg, QG and so on.
> Is this point of view correct??
>
> Second, if objective fuction can change, matpower evaluate parameter(e.g.
> Pg,Qg) with change objective fuction??
>
> Third, I think polycost.m is written objective function. Is this
> objective function cost(objective function = c0 + c1 * Pg + c2 * Pg^2) ??
>
> Sincerely,
> Kazuhiro Okabe
>
>
>
> -------------------------------------------
> Kazuhiro OKABE
> Faculty of Engineering
> Dept.of Infomatics and Imaging Systems
> Chiba University, JAPAN
> E-mail: [email protected]
> -------------------------------------------
>
>
>
>
--
*Fred Kanjelesa.
*Zambia/Lusaka.
Mobile: +260967880912
"Go as far as you can see. When you get there, you'll be able to see
farther!" *Thomas Carlyle* ** ****
