QT is the reactive power at the receiving end of a branch and it is equal to Vf * conj(If), where If can be found according to equations (3.1) and (3.2) in the manual. Make sure you don't forget to take the conjugate of the current, and be sure to include any line charging capacitance (assuming it is not a transformer).
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On May 8, 2012, at 7:31 PM, Parag Patel wrote: > sir i am a btech student. i was workin on voltage indices calculation > for branches or lines. there i needed a data called reactive power at > the recieving end, is it QT. i solved for reactive power at recieving > end by mathematical equations i.e. current =(sending end volt - > recieving end volt)/ impedance and then multiplied current by the > recieving end voltage. separated real and imaginary parts. but it was > different from QT. thank you sir. > > On 09/05/2012, Hanie Sedghi <[email protected]> wrote: >> I am not sure if I needed a permission to write in that location. But I did >> change the location from partition D to somewhere in my windows drive and >> the problem was solved. >> >> Thank you so much for your help. >> >> Hanie >> >> On Tue, May 8, 2012 at 7:22 AM, Ray Zimmerman <[email protected]> wrote: >> >>> Do you have write permissions on the directory you are running this from? >>> That particular test temporarily writes a file and it appears there is an >>> error when trying to save that file (though the error message is a bit >>> mysterious ... can't create a new file because the file doesn't exist?) >>> >>> -- >>> Ray Zimmerman >>> Senior Research Associate >>> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >>> phone: (607) 255-9645 >>> >>> >>> >>> >>> On May 7, 2012, at 9:28 PM, Hanie Sedghi wrote: >>> >>> Hello, >>> >>> I have just installed MATPOWER by following step 1-3 from the manual. but >>> when in step 4, I write >>> test_matpower >>> I face the following errors: >>> >>> t_loadcase..........Error using save >>> Cannot create 't_mat9_opf.mat' because 't_mat9_opf.mat' does not exist. >>> >>> Error in t_loadcase (line 59) >>> eval(['save ' matfile '.mat baseMVA bus gen branch areas gencost']); >>> >>> Error in t_run_tests (line 79) >>> feval( test_names{k}, ~verbose ); >>> >>> Error in test_matpower (line 135) >>> t_run_tests( tests, verbose ); >>> >>> Actually, I did look into the file I have downloaded and I could not see >>> any files named t_mat9_opf.mat. >>> I am using a MATLAB R2011b on a 64bit windows 7. >>> I would truly appreciate if you could help me with this. >>> >>> Best Regards, >>> Hanie >>> >>> >>> >> >
