Very good explanation Ray, Should anyone be interested, You can use OPTI Matlab Software to benchmark several other methods (from within OPTI) to solve the problem via a common interface.
Regards. José Luis de la Fuente ________________________________ De: [email protected] <[email protected]> en nombre de Ray Zimmerman <[email protected]> Enviado: jueves, 3 de mayo de 2018 18:53 Para: MATPOWER discussion forum Asunto: Re: Regarding Matpower's acopf solver MATPOWER’s MIPS solver is a very basic vanilla primal-dual interior point method. On the other hand, fmincon provides a number of different algorithms, including a primal-dual interior point method, which is the one chosen by default in MATPOWER when selecting fmincon. I suspect that its implementation includes numerous “enhancements” to the very vanilla implementation used by MIPS. These may be helpful in some circumstances for a general nonlinear solver, but in my experience with solving OPFs do not often improve either performance or robustness over MIPS. I’m sure there are certain instances in which they do make a positive difference. The Ipopt and Knitro solvers are also based on interior point method, and as with fmincon, I’m sure they include enhancements to improve performance and robustness in general, which may or may not help in any given OPF problem. I’m sorry I can’t give you the precise details of the differences because I do not have access to the details of the implementations of these other solvers. Ray > On May 2, 2018, at 9:56 AM, Viswanath Hariharan <[email protected]> wrote: > > 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. > > Regards > Viswanath ============================================================== Por favor, piense en el medio ambiente antes de imprimir este mensaje. Si usted recibe por error este mensaje, por favor comuníquelo a su remitente y borre inmediatamente tanto el mensaje como cualquier anexo o copia del mismo, ya que contiene información confidencial, dirigida exclusivamente a su destinatario y cuya utilización o divulgación a terceros están prohibidas por la ley, pudiendo dar lugar a responsabilidades civiles y/o penales. Las ideas contenidas en este mensaje son exclusivas de su(s) autor(es) y no representan necesariamente el criterio de Iberdrola,S.A. ni de otras sociedades de su grupo. Ni Iberdrola,S.A. ni ninguna sociedad de su grupo garantiza la integridad, seguridad y correcta recepción de este mensaje, ni se responsabiliza de los posibles perjuicios de cualquier naturaleza derivados de la captura de datos, virus informáticos o manipulaciones efectuadas por terceros. ============================================================== Please consider the environment before printing this email. If you have received this message in error, please notify the sender and immediately delete this message and any attachment hereto and/or copy hereof, as such message contains confidential information intended solely for the individual or entity to whom it is addressed. The use or disclosure of such information to third parties is prohibited by law and may give rise to civil or criminal liability. The views presented in this message are solely those of the author(s) and do not necessarily represent the opinion of Iberdrola,S.A. or any company of its group. Neither Iberdrola,S.A. nor any company of its group guarantees the integrity, security or proper receipt of this message. Likewise, neither Iberdrola,S.A. nor any company of its group accepts any liability whatsoever for any possible damages arising from, or in connection with, data interception, software viruses or manipulation by third parties. ============================================================== Mesedez, mezu hau inprimatu baino lehen hartu kontuan ingurua. Oker bategatik mezu hau jasotzen baduzu, mesedez esaiozu bidaltzaileari eta ezaba itzazu berehala bai mezua, bai atxikitako guztia edo haren kopia ere, isilpeko informazioa daukalako, jasotzaileari soilik zuzendutakoa; Legeak debekatzen du hura erabiltzea edo beste edonori bidaltzea eta erantzunkizun zibil eta/edo penalak eragin ditzake. Mezu honetan dauden ideiak egileenak baino ez dira eta ez dute nahitaez ordezkatzen Iberdrola,S.A.ren ez eta haren taldeko beste sozietateen irizpidea; ez Iberdrola,S.A.k ezta haren taldeko ezein sozietatek ez dute mezu honen segurtasuna, osotasuna eta iristera zuzena bermatzen, eta ez dute inolako erantzunkizunik onartzen hirugarren batek egindako datu-harrapaketatik, birus informatikoetatik edo manipulazioetatik erator litekeen edozein eratako ustezko kalteen aurrean. ==============================================================
