Thank you for your hint Ray, I two questions about CPF, would be glad if someone reply. 1) What is the specifics of the bus that CPF plots itself? Does it means the voltage at that bus has been violated more than the others? 2) I calculate the voltage violation as follows: absV=abs(res.cpf.V); % nb* nitr last_itr=size(absV,2); voltage_dev= max(absV') - min(absV'); % voltage violation figure(2) bar ( voltage_dev)
Is this correct? the curve that cpf plots is not always the same as the index of the bus corresponding to max(voltage_dev) Thanks. On Tue, Nov 28, 2017 at 5:43 PM, Ray Zimmerman <[email protected]> wrote: > You may also want to consider the code in extras/maxloadlim which uses an > OPF to find the maximum loadability. You can find the manual for this code > on GitHub here > <https://github.com/MATPOWER/matpower-extras/blob/master/maxloadlim/manual/maxloadlim_manual.pdf> > . > > Ray > > > On Nov 28, 2017, at 5:45 AM, Electric <[email protected]> > wrote: > > Thank you for your informative answer. If I only increase the load at a > single bus, *i*, in the target case, does Max lambda indicates > vulnerability of bus *i*, for voltage stability of power system. > In other words, does it mean that bus is critical for voltage stability > studies? > > On Mon, Nov 27, 2017 at 11:22 PM, Abhyankar, Shrirang G. <[email protected]> > wrote: > >> Hello, >> >> MATPOWER’s CPF requires two data files; the first one having the base >> loading/generation, called basecasedata, and the other that has the target >> loading/generation, called targetcasedata. The CPF traces the trajectory of >> solutions along increasing lambda direction, with lambda = 0 at the >> base-case solution and lambda = 1 at the targetcase. Lambda can go beyond >> or less than 1 depending on where the system collapses (maximum loadability >> limit). >> >> >> >> From your question, it seems like you want to increase the load at a >> single bus. For this, you merely need to modify the load for the given bus >> in the targetcase data and run the CPF. >> >> >> >> Shri >> >> *From: *<[email protected]> on behalf of >> Electric <[email protected]> >> *Reply-To: *MATPOWER discussion forum <[email protected]> >> *Date: *Monday, November 27, 2017 at 4:23 AM >> *To: *MATPOWER discussion forum <[email protected]> >> *Subject: *Fwd: How to find max-load ability for each bus of power system >> >> >> >> >> >> I am interested to find the max load-ability at each bus in order to find >> the most critical buses in a power system in aspect of voltage stability. >> How is it doable? >> >> I thought of cpf, but it merely returns the max lambda which is an index >> for whole system. >> >> >> > > >
