Thank you very much Jose
From: [email protected] [mailto:[email protected]] On Behalf Of Ray Zimmerman Sent: 15 February 2013 20:18 To: MATPOWER discussion forum Subject: Re: PTDF adn DC power Flow You should be able to reconstruct the flows for a given DC power flow using the appropriate PTDF matrix. In fact, there are examples of doing this for various PTDF matrices in the MATPOWER tests for makePTDF(). You can find these tests in t/t_makePTDF.m. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 14, 2013, at 1:24 PM, "Calvo, Jose" <[email protected]<mailto:[email protected]>> wrote: Dear Prof. Zimmerman, I'm currently using running DC power flows in Matpower. Alternatively, I compute the shift factors by myself. As far as I'm concerned, for the same set of power injections and withdrawals, both techniques should provide me identical flows over my network, but surprisingly this is not what is happening. Even though I get different power flows, I've observed that the net export (flows from all lines connected to a bus) for all nodes are the same in both mechanisms. The shift factors are apparently well computed. Does this make any sense? I would strongly appreciate if you could provide some feedback on this. Kindest regards, Jose
