I’m afraid I cannot speculate on the reasons for non-convergence of the OPF in your case. There are numerous ways in which an OPF problem can end up with an empty feasible region.
Ray > On Nov 8, 2016, at 12:07 AM, Angel Pastor <[email protected]> wrote: > > Thank's for your answer mister Zimmerman, i tried with some of the cases in > the Matpower files like the case30 and case14 and it worked. > > > But in the system i'm working the OPF does not converge and it says it > numerically fails, when i run the normal power flow it converges but it > doesn't satisfy neither the voltage or the generation constraints, ¿that > could be the reasson why the OPF does not converge? > > > I was trying to apply an optimal reactive compensation to solve that problem > and get the OPF satisfying all the constraints. > > > > De: [email protected] > <mailto:[email protected]> > <[email protected] > <mailto:[email protected]>> en nombre de Ray > Zimmerman <[email protected] <mailto:[email protected]>> > Enviado: lunes, 07 de noviembre de 2016 11:06 a.m. > Para: MATPOWER discussion forum > Asunto: Re: Optimal reactive compensation in MATPOWER > > You could add a generator at each bus and then use an OPF to solve for the > power flows, with the real power dispatches constrained to their initial > values. > > Ray > > >> On Nov 6, 2016, at 9:40 AM, Angel Pastor <[email protected] >> <mailto:[email protected]>> wrote: >> >> Dear MATPOWER community. >> >> Hi to everyone, i'm trying to implement reactive power compensation in a >> power system, my goal is to make voltage in all buses have values within the >> constraints, but i don't know neither the ubication for the compensation or >> the MVAR's that would give me the optimal solution and satisfy all the >> constraints. So i was wondering if there is a way for matpower to get me >> that information. >> >> My system consist in 14 buses, 5 PV (one generator per bus) and 9 PQ. I was >> thinking in modeling the compensators as reactive power generators with no >> Pg, as in a OPF the reactive power generated Qg is an optimization variable, >> but i only have that variable in the PV buses, and i need to be able to >> compensate in any bus to have the optimal solution. >> >> I could make all the buses PV to put generator in all the buses, but then >> the voltage would be attached to de Vg values from the gen_matrix. >> >> Other idea i had was to add a new variable with the add_userfcn. function >> and change the OPF formulation with >> >> function om = userfcn_reserves_formulation(om, args) >> >> But i think that variable would still be limitated to to the PV buses and >> would only add a reserve to the current generators. >> >> If you could help me with this, i would really appreciate it. >> >> Hoping to get response. Thanks in advance. >> >> Angel Araque, Electrical Engineering student in University of Los Andes. >> Venezuela
