Hi
I was wondering if anyone could explain the mathematical difference between
MATLAB's fmincon solver to solve ACOPF and MATPOWER's runopf function/mips
to solve the ACOPF problem. If both of them are going to find the local
minima, what is the mathematical difference between the both?
Thank you.
with x and
x, lambda as input arguments respectively.
Could you guide me as to where I might be going wrong with this?
Regards
Viswanath
On Thu, Oct 19, 2017 at 11:31 AM, Viswanath Hariharan
wrote:
> Sir
> So where does these functions obtain x and where does the hess function
> obta
ambda and x. Both lambda and x are provided as
> inputs, you provide the Hessian of lambda’ * h(x) as output. Since h(x)
> (and also lambda) is a scalar in your case, the Hessian is simply lambda *
> H.
>
> 2. I assume N is a constant that is entered as part of your definition of
>
own?
>
> Ray
>
>
> On Oct 13, 2017, at 11:35 AM, Viswanath Hariharan
> wrote:
>
> I tried getting out of the problem by assigning allow_multiple = 1 for
> add_userfcn. But I couldn't get past this error:
> Error using opt_model/add_constraints (line 87)
>
y be
> found here:
>
>https://www.dropbox.com/s/3qkji1cuyi075uj/MATPOWER-manual.pdf?dl=0
>
> You’ll probably want to use the method described in Section 7.1.2 for
> Nonlinear Constraints. In particular, you’ll want to look at the example
> mentioned in t_opf_mips().
>
>
guide me as to how I can overwrite this too?
Thank you sir
Regards
Viswanath
On Fri, Oct 13, 2017 at 11:22 AM, Viswanath Hariharan
wrote:
> Sir
> So I used the toggle_myconstraints method you had suggested to add Voltage
> angle constraints to the problem. After getting the solution, I
Oct 13, 2017 at 10:04 AM, Viswanath Hariharan
wrote:
> Thank you for your help sir. I think I was doing something wrong. It works
> alright now.
>
> Regards
> Viswanath
>
> On Oct 12, 2017 10:03 AM, "Ray Zimmerman" wrote:
>
>> Are you saying that your solutio
rees?
>
>Ray
>
>
> On Oct 11, 2017, at 8:52 PM, Viswanath Hariharan
> wrote:
>
> First, thank you so much for your time, Sir.
> So I tried the first approach first. I want to added box constraints for
> Voltage angle, -0.26 < theta < 0.26. I created the A m
ou can simply toggle your constraints on and use runopf() normally.
>
> mpc = loadcase('');
> mpc = toggle_myconstraints(mpc, 'on');
> results = runopf(mpc);
>
> Hope this helps,
>
> Ray
>
>
>
> On Oct 5, 2017, at 12:18 PM, Viswanath Hariharan
>
n't getting updated as well. I think I am making some mistake with
this line : mpc = get_mpc(om) because om is fine. What am I missing here?
Or should I take another approach?
Thank you so much for your time Sir.
Regards
Viswanath Hariharan
On Thu, Oct 5, 2017 at 10:27 AM, Ray Zimmerman
Hello Sir
I want to add non linear cost constraints to the opf solver.
cost = x'Hx + C'x + constant <= 2
How do I use the add_constraints function to add this constraint? Should I
be adding new fields toom and then should I be passing it to
add_constraints?
Rega
?
Regards
Viswanath Hariharan
On Wed, Sep 27, 2017 at 1:39 PM, Ray Zimmerman wrote:
> Voltage magnitude constraints are already included. Simply set the VMIN
> and VMAX columns in the bus matrix to the desired values.
>
> For voltage angles, simply define the A, l and u corresponding t
u mentioned to add these constraints to the case
struct which looked pretty simple in the post but I didn't know how to add
that to the case struct.
I was wondering if you can guide me on how to do it. Hoping to hear from
you soon.
Regards
Viswanath Hariharan
Graduate Research Assistant
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