It is unnecessary to use an optimization software for solving the traditional load flow problem.

Mohamed EL-Shimy

I am trying to solve an optimisation problem in power systems and I need to do load flow there.

You may check the MATPOWER toolbox

@ Mohamed El-Shimy

The runtime with Matlab and metaheuristics is too high, so I am using Gams.

I haven't used GAMS for load flow. But with my experience on solvers, Gurobi would be my go to option for complex problems.

It depends on your modeling representation either the problem is non linear or it's a mixed integer non linear , and it depends also on how far the solution would be acceptable, in other words, are you looking for a global optimum solution ? or a local optimum would be sufficient ?

Based on my little experience in GAMS, a BARON solver would be suitable to achieve a global solution in mixed integer non linear problems

Holomorphic embedding load flow method:

A recently developed method based on advanced techniques of complex analysis. It is direct and guarantees the calculation of the correct (operative) branch, out of the multiple solutions present in the power flow equations

Dear Ahmad,

You can use GAMSPOWER for ACOPF studies.

Best regards,

Ali Esmaeel Nezhad

Ali Esmaeel Nezhad

Dear Ali

Thanks for your response. I have used GAMS, but the solutions are not global. You have got global solutions? Which solver do you use?

Regards

Ahmad

i recommend you check the following link.

https://www.gams.com/latest/psoptlib_ml/libhtml/psoptlib_MultiperiodACOPF24bus.html

the aforementioned AC power flow is coded using GAMS by one of the GAMS experts. He only do request that publications derived from the use of the developed GAMS code cite the following book

Soroudi, Alireza. Power System Optimization Modeling in GAMS. Springer, 2017. DOI: doi.org/10.1007/978-3-319-62350-4

Better have your coding either in VB or Excel for gaining experience and then go for advanced languages.

Dear Ahmad,

I knew some friends who use GAMS to develop their thesis (in Portuguese) obtaining a fast solution.

- https://teses.usp.br/teses/disponiveis/18/18154/tde-30052016-104323/publico/Ana.pdf

- https://www.teses.usp.br/teses/disponiveis/18/18154/tde-07042011-151716/publico/Edilaine.pdf

- https://teses.usp.br/teses/disponiveis/18/18154/tde-06062017-072758/publico/Fillipe.pdf

AC load flow is a nonlinear programming model. In GAMS, there are lots of solver options for nonlinear programming. SNOPT, CONOPT, and IPOPT are three solvers I used to solve ACOPF.

Dear...

In my opinion CONOPT solver is the best embedded solver in GAMS...Also, Gams is very suitable for AC power flow...

See my paper CONOPT SOLVER ENBEDDED IN GAMS FOR OPTIMSL POWER FLOW...

Best,

Martin