Re: power flow problem

[Carlos E Murillo-Sanchez]

Rather, it seems that your optimization method should take into account any constraint violation and fix the issue by itself.  In some methods, such as GA, one way to do this is by using penalty functions on constraint violations. carlos. Mohamed Shaheen wrote: I need to enforce limits, but I aim to get the optimal solution and best parameters using another optimization method called 'Tree Seed' and compare it with 'Genetic Algorithm' after running normal power flow, So I'm not seeking the optimal solution using Matpower itself. Can Matpower help to do this?  ᐧ On Fri, 8 Feb 2019 at 23:53, Ray Zimmerman <r...@cornell.edu> wrote: The power flow problem solved by runpf does not take into account voltage limits. If you need to enforce limits, you can use an appropriately constrained OPF. In this case, it just so happens that the initial voltage specified for bus 31 in the case57.m file happens to be the voltage at the power flow solution.     Ray On Feb 8, 2019, at 2:54 PM, Mohamed Shaheen <mohamed.shaheen9...@gmail.com> wrote: Dear Sir, Regarding the case57, the voltage of bus 31 is 0.936 p.u which is less than the min. limit of bus voltage (0.94). Every time I run 'runpf', the voltage value is 0.936 and it doesn't change although it is a PQ bus. I need your help, please.    Regards, Mohamed Shaheen. Msc. student at Ain Shams University in Egypt Teaching Assistant in Future University in Egypt ᐧ