DC load flow does not consider losses or reactive power


From: [email protected] 
[mailto:[email protected]] On Behalf Of marco antonio 
leonibarra
Sent: Wednesday, 5 October 2011 09:39
To: [email protected]
Subject: DC power flow

Hi all,

I am trying to run the file 'case9.m' that is already in the Matpower library 
by means of rundcpf(case9). I am specially interested in using DC Power Flow 
formulation in order to avoid iterations with other methods. Before running it, 
I am setting up the variable PF_DC to 1, as it is indicated in the manual:

PF_DC                  DC modeling for power flow and OPF formulation

                             0  use AC formulation and corresponding alg options

                             1  use DC formulation and corresponding alg options



so my instruction to matlab window is as follow:

>>mpopt=mpoption('PF_DC',1);
>>rundcpf(case9,mpopt)

The result shows me there are no losses (zero power losses). Does somebody know 
if there's a way to get the real and reactive power losses using DC formulation?

Thanks in advance.

Marco.


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