By the way, please direct all MATPOWER support questions to the MATPOWER-L mailing list <http://www.pserc.cornell.edu/matpower/#mailinglist> and try searching the mailing list archives before posting as well. You may find the discussion in the following thread to be helpful …
http://www.mail-archive.com/matpower-l%40cornell.edu/msg01193.html You can choose whatever units you want (MW, kW, W, etc) to use for the power values in your inputs and outputs (though the labeling will always say MW). And you can choose any value you want for your baseMVA value (whose units are assumed to be consistent with the units of your input powers). The important thing is that all of your p.u. impedances must be consistent with the units you have chosen. This means that if you have a case properly modeled using MW for the power units and you want to convert it to kW, you will to multiply all the powers (load in the bus matrix, generation in the gen matrix) by 1000, divide all of the impedances by 1000 (R and X in the branch matrix) and divide all of the line charging impedances and shunts by 1000. Assuming you don’t change the value of the baseMVA variable, this should result result in an identical power flow solution, just with scaled units. Hope this helps, Ray > On Jul 18, 2015, at 1:59 AM, tohid far <[email protected]> wrote: > > Hello, > > I am very appreciate your help. > > I have another question about baseMVA in top of all case study, for instance > case9, case33, ... . if i consider baseMVA=1000 to suppose in my mind that > every demand or generate is in KVA scale, is it true or not? > > Because i want to simulate network distribution in low level VA. > >> Thank you for attention. >> With the best wishes, >> Tohid Farhoudi
