Hi iman,
You need to add the sixth row to the mpc.gencost matrix. Simply copy the fifth
row and paste as the sixth row.
Then try this. I know power flow does not use the mpc.gencost matrix for
computation. But if it is defined in a case file and alteration is made to the
the mpc.gen matrix then it has to be reflected on mpc.gencost matrix.
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 10 0 10 -10 1.01 100 1 20 0]; %add 0MW to bus 4
mpc.gen (6,PG) = 10; %add 10MW to bus 4
mpc.bus (4,BUS_TYPE) = 2; %changes the type of bus 4 to PV
results= runpf(mpc)
regards
Idris
From: [email protected]
[mailto:[email protected]] On Behalf Of Idris Musa
Sent: 17 November 2011 19:02
To: 'MATPOWER discussion forum'
Subject: RE: I want to add a 10MW generator to bus 7
Hi,
To increase the real power demand at bus 4
mpc.bus(4,PD)=mpc.bus(4,PD)+10;
Idris
From: [email protected]
[mailto:[email protected]] On Behalf Of iman
Sent: 17 November 2011 18:54
To: MATPOWER discussion forum
Subject: Re: I want to add a 10MW generator to bus 7
Dear Idris,
No the problem is not because of that.Even if you type scrpits as :
>>mpc.bus (4,BUS_TYPE) = 2; %changes the type of bus to PV
>>runpf(mpc)
which is not correct,you still have the errors
Looking forward to hear from you
Bye
Iman
On Thu, Nov 17, 2011 at 6:35 PM, Idris Musa
<[email protected]<mailto:[email protected]>> wrote:
Hi ,
The Generator is at bus 4 so
mpc.bus(4,BUS_TYPE)=2;
Idris
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]<mailto:[email protected]>]
On Behalf Of iman
Sent: 17 November 2011 18:28
To: MATPOWER discussion forum
Cc: [email protected]<mailto:[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
--
Best regards
Iman
