Yes, I should have mentioned MPNG<https://github.com/MATPOWER/mpng> as an
option for your problem.
If none of the solvers are able to converge, you may very well have a problem
with feasibility of your problem. If so, you might try relaxing some
constraints until you achieve convergence, they gradually tightening up the
constraints again until you can discover what is causing the infeasibility.
Ray
On Dec 13, 2021, at 4:22 PM, Ahmad Bariq Al Fahri
<[email protected]<mailto:[email protected]>> wrote:
Thank you Sir for the response. I tried to add new variables as well as linear
and nonlinear constraints. Modifications were made by increasing the matrix
dimension and putting the additional equality and inequality as well as its
derivatives (g, h, dg, dh, d2G, d2H). But, I did not get the convergence result
as it showed an error. I will try the Matpower Natural Gas (MPNG) suggested by
Wilson to solve this problem.
I supposed that this problem can be solved using the IPOPT solver since MPNG
also faces the same convergency problem when running on MIPS or FMINCON. Thank
you
Ahmad Bariq Al Fahri
Department of Electrical Engineering
Sepuluh Nopember Institute of Technology
On Mon, 13 Dec 2021 at 22:37, Ray Daniel Zimmerman
<[email protected]<mailto:[email protected]>> wrote:
In order to help, we’ll need more information. Such as, what is the form of the
additions you are making to the MATPOWER formulation? New variables? Linear
and/or nonlinear constraints? New costs? And how are you trying to do the
modifications?
But first, let me strongly suggest using the latest MATPOWER (7.1) as opposed
to 5.0 which was released 7 years ago. Version 7.1 does include user
customization mechanisms for adding nonlinear constraints to the problem.
Ray
On Dec 11, 2021, at 1:08 AM, Ahmad Bariq Al Fahri
<[email protected]<mailto:[email protected]>> wrote:
Dear respected developer,
I am Ahmad, currently doing research on Optimal Power and Gas Flow (OPGF). I
tried to merge the electrical power system with the gas system to obtain the
optimal power and gas flow. But, I face some problems when I concatenated the
equality and inequality matrix (g, h, dg, dh, d2G, d2H). I have already added
the optimization variable and built the aforesaid matrix as well as its
derivatives. But, when I run the program it shows "Numerically Failed" and "Did
not converge in 10 iterations.". Could you help me to explain what other steps
that I need to do if I want to modify Matpower?
Thank you in advance.
*Simulation conducted in Matpower 5.0
*OPF calculation performed using MIPS
Regard
Ahmad Bariq Al Fahri
Department of Electrical Engineering
Sepuluh Nopember Institute of Technology
LinkedIn<https://www.linkedin.com/in/alfahri/>
