On Sep 5, 2013, at 1:23 AM, dharmesh dabhi wrote: > Hello sir, > IN my project i want to find out ATC by using CPF (continuation > power flow) method algorithm in IEEE 14 bus system using PSAT Matlab > toolbox.so i have question that Is it possible to code CPF mehod in PSAT for > finding out ATC.IF yes then HOW?
You need to ask this question on the PSAT discussion forum http://groups.yahoo.com/neo/groups/psatforum/info > IF not then WHICH are the other option ? > > > Sincerly, > Dharmesh dabhi > > > > THANK YOU SIR > > > On Thu, Sep 5, 2013 at 11:51 AM, dharmesh dabhi <[email protected]> > wrote: > Hello sir, > IN my project i want to find out ATC by using CPF (continuation > power flow) method algorithm in IEEE 14 bus system using PSAT Matlab > toolbox.so i have question that Is it possible to code CPF mehod in PSAT for > finding out ATC.IF yes then HOW? IF not then WHICH are the other option ? > > > On Thu, Sep 5, 2013 at 10:11 AM, Shri <[email protected]> wrote: > > On Sep 4, 2013, at 12:44 PM, dharmesh dabhi wrote: > >> HELLO, >> I have two questions >> .Q:1 How Continuous power flow (CPF) different from Newton raphson( N.R) ? > AC power flow solution is carried out with a Newton-Rhapson method for a > fixed generation/loading profile. Continuation power flow consists of a > series of AC power flows where the loading/generation is increased/decreased > at each step. Instead of simply increasing/decreasing the loading/generation > and solving repeated power flows, an extra equation is appended to the > original power flow equations in a continuation power flow. This extra > equation describes how the current step is related to its previous one. This > is done so because at near loading limit, the Jacobian matrix becomes > ill-conditioned and a simple power flow may diverge. The extra equation helps > in eliminating this ill-conditioning issue. You may want to refer this > classical paper on continuation power flow by Ajjarapu and Christy > http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=141737&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel1%2F59%2F3807%2F00141737 > >> Q:2 What are the problem facing in N.R Method for large number of >> population size during calculation of 'ATC' ? >> >> > > I am assuming here by large population size you mean large number of > variables. > > The biggest bottleneck is factoring the Jacobian matrix repeatedly. This > paper might be of interest to you > http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=736300&url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel4%2F59%2F15860%2F00736300 > > What is the problem that you are trying to solve? How big is your system? > > Shri >> >> Sincerly, >> Dharmesh dabhi > > >
