Hi , The Generator is at bus 4 so mpc.bus(4,BUS_TYPE)=2; Idris
From: [email protected] [mailto:[email protected]] On Behalf Of iman Sent: 17 November 2011 18:28 To: MATPOWER discussion forum Cc: [email protected] Subject: Re: I want to add a 10MW generator to bus 7 Dear All, Thank you for the responses. You have been a big help to me .I managed to add generators to other buses in case14 by adding a generator to bus 4 (row 6) as Dr Zimmerman suggested: define_constants; mpc = loadcase('case14'); size(mpc.gen, 1); %gives the last row of generator data ng = size(mpc.gen, 1) + 1; %Specifies the start point mpc.gen(ng, GEN_BUS:PMIN) = [4 0 0 10 -10 1.01 100 1 20 0]; %add 0MW to bus 4 Now if I want to increase its real power demand at bus 4 to 10 MW I add scripts as follows: mpc.gen (6,PG) = 10; %add 10MW to bus 4 mpc.bus (6,BUS_TYPE) = 2; %changes the type of bus 6 to PV runpf(mpc) But unfortunately again I receive error which I don’t know why??? ??? Error using ==> subsref Index exceeds matrix dimensions. Error in ==> get_reorder at 50 B = subsref(A, s); Do you have any ideas? I am so greatful of your guidance and suggestions Regards Iman =================================================================== On Thu, Nov 17, 2011 at 3:35 PM, Álvaro Jaramillo Duque <[email protected]<mailto:[email protected]>> wrote: Hello I think the error is due because there wasn't a generator at bus 7 and you didn't add all the information concerning a that generator. Look in the manual, Appendix B Data File Format, or just open the case in a editor text and see what is required for a generator, this is the best way to understand the MATPOWER file format. I think you mistook the "id" of the node with the position on the matrix mpc.gen >> define_constants; >> mpc = loadcase('case14'); >> size(mpc.gen) ans = 5 21 See that the dimension is 5 rows, 7 out of the dimension. What I am not sure if is mandatory for a PF add the mpc.gencost information of the new generator. The rest I think is OK, because you have to modify the node type. Best regards. Álvaro -- Best regards Iman
