1) I assumed you were talking about case30 … for me case30 does result in a 72x72 Hessian. 2) If you mean the first derivatives of the power flow equations then it is generally 2*nb x 2 * (nb + ng).
-- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Aug 2, 2013, at 11:58 PM, Kartik Pandya <[email protected]> wrote: > Dear Ray Sir, > Thank you for your reply. > I have still two queries. > (1) In matpower 4.1, the size of hessian obtained from ACOPF is 66*66. But > shouldn't it be 72*72, as it has 30 voltage magnitudes, 30 voltage angles, 6 > active power flow injections and 6 reactive power flow injections. (total > size=30+30+6+6=72)? > (2) Is there any equation for determining the size of Jacobian for ACOPF? > > Thank you > > From: Ray Zimmerman <[email protected]> > To: MATPOWER discussion forum <[email protected]> > Sent: Thursday, 1 August 2013 6:49 PM > Subject: Re: Hessian > > See Table D-9 in the User's Manual. > > opf_hessfcn.m > > > -- > Ray Zimmerman > Senior Research Associate > B30 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > > On Aug 1, 2013, at 6:18 AM, Kartik Pandya <[email protected]> wrote: > >> >> >> Dear Ray sir, >> Which .m file calculates Hessian matrix in case of ACOPF? >> >> Thank you > > >
