above.
> The whole thing seems to be reliable and spam-free - and it is a fast,
> easy and cost-free solution.
>
> René
>
>
> On 09/02/2010 11:58 AM, Ray Zimmerman wrote:
>> Unfortunately, there is not currently a publicly available archive that I am
>> awa
patch for each
generator and use rundcopf with multiple reference buses, one per island. I
believe this should give you the same result.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 6, 2010, at 12:48 PM, Rene Pfi
You may find useful information here ...
http://www.pserc.cornell.edu/tcc/
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 6, 2010, at 1:46 AM, raghu guniganti wrote:
how find ATC of 30-bus system in MATPOWER
by setting the OPF_FLOW_LIM option to 1.
If you mean that you want to compute the maximum transfer capability on a
particular line, then the answer is, no, MATPOWER does not currently have a
function to do that automatically.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell Univers
Yes, the result should be fine if it says it converged.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 8, 2010, at 12:09 AM, Joseph Henry Salonga wrote:
I tried to run a dcopf on the IEEE 24 bus system. I used the
ply.
Hope it helps,
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 3, 2010, at 12:00 AM, Ummaiah B wrote:
Deal all,
My problem:
I m doing the AC DC load flow analysis,incorporating DC line
between
spect line limits because it
is a constrained optimal dispatch problem.
So, if you want to respect line limits you need to allow redispatch. If you
allow redispatch, you need to specify the criteria for redispatch (an
objective) ... essentially and OPF.
--
Ray Zimmerman
Senior Research Associate
The flow limits are parameters, specified by you in column 6 of the branch
matrix. They are not something that MATPOWER can calculate.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 9, 2010, at 7:44 AM, dawood
Just as with AC power flow, the difference is taken up by the slack bus
generator ... that is, the generator at the reference bus.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 9, 2010, at 8:57 PM, Rene Pfitzner
MATPOWER reports the reactive power loss in the series portion of each branch
separately from the reactive power injected by the line charging capacitance.
The total losses are equal to the former minus the latter.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University
Your case file has an extra column of zeros in the branch matrix (column 3).
Delete that and it runs just fine.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 13, 2010, at 1:31 AM, Hai Vu Luu wrote:
> To whom
Your case file has 1165 generators, but only 3 generator costs. You need to
either remove the gencost matrix or update it to be consistent with the gen
matrix.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 13
Please restrict discussion on this list to MATPOWER.
Thank you,
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 16, 2010, at 4:19 AM, indra g.c. wrote:
Dear Dieu,
Thank you for sending me the Hadi Saadat's To
See table B-4 in the current user's manual at
http://www.pserc.cornell.edu/matpower/manual.pdf
These are the coefficients of polynomial total cost as a function of the
generator's real dispatch. The fixed cost would be the c0 term (i.e. the cost
when Pg = 0).
--
Ray Zimmerman
Senio
It's all described in detail in the MATPOWER User's
Manual<http://www.pserc.cornell.edu/matpower/manual.pdf>.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 23, 2010, at 6:43 AM, Idris Musa wrote
There is no explicit loss term. the loss is implicit in the power balance
equations.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 23, 2010, at 12:19 PM, Idris Musa wrote:
I have read it before but couldn’t get
The output results do not include the loss sensitivity values.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 1, 2007, at 10:37 AM, Basem Alamri wrote:
hi all,
When running OPF , is there a way to see and
On Mar 14, 2007, at 1:10 PM, shane.steen...@strath.ac.uk wrote:
In some of the examples on Matpower, the branches had zero
resistance, is this
because they are so small that they can be disregarded?
I assume this is the reason. I did not create these cases, just took
existing cases and put
of putting it into MATPOWER format, just
wondering if
i'm missing something obvious?!
thanks
shane.
Quoting Ray Zimmerman :
On Mar 14, 2007, at 1:10 PM, shane.steen...@strath.ac.uk wrote:
In some of the examples on Matpower, the branches had zero
resistance, is this
because they ar
to make the PV / PQ distinction for the purpose of finding
a solution. If, for example, one would like to hold the voltage
constant, it can be done using the voltage constraints. Similarly,
for any of the other variables.
I hope this answers your question.
--
Ray Zimmerman
Senior Research
MATPOWER case file expects these values in p.u. so that should be all
you need to do.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 16, 2007, at 10:30 AM, shane.steen...@strath.ac.uk wrote:
Hi, a small
On Mar 18, 2007, at 8:11 PM, shane.steen...@strath.ac.uk wrote:
Wondering if it would be possible to model the integration of a
wind farm of say
100MW using MATPOWER, thinking could enter the reactive power, is
this possible?
If you are thinking of modeling it as a specified P and Q injectio
On Mar 19, 2007, at 4:07 PM, shane.steen...@strath.ac.uk wrote:
Quoting Ray Zimmerman :
On Mar 18, 2007, at 8:11 PM, shane.steen...@strath.ac.uk wrote:
Wondering if it would be possible to model the integration of a
wind farm of say
100MW using MATPOWER, thinking could enter the reactive
sable tool, but I'm
not likely to get the time to do it myself anytime soon.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
1 is the slack bus. (i.e. bus(1, BUS_TYPE) == REF). This means
that whatever you specify in gen(1, PG) will be replaced by the
computed value anyway when you run a power flow, so that value is
irrelevant.
Note: The constants BUS_TYPE, REF and PG are defined in idx_bus.m and
idx_gen.m
-
OWER's implementation the reference bus is exactly
that. The power flow problem, on the other hand needs both (1) and
(2), and in the MATPOWER implementation the reference bus serves as
both.
[a] P and Q balance at each bus
[b] V at load buses, Q at remaining buses and angle at all buses
gling with the idea
of this
'slack' for the real power, because if the generator info is not
entered in that
field then how does MATPOWER know the generator output?
thanks.
shane.
Quoting Ray Zimmerman :
On Mar 22, 2007, at 4:32 PM, Prof. Jose Roberto Camacho wrote:
I
://www.pserc.cornell.edu/matpower/manual.pdf)
for a description of how this is handled.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 26, 2007, at 1:01 PM, shane.steen...@strath.ac.uk wrote:
Another generator input
in the User's manual (http://www.pserc.cornell.edu/
matpower/manual.pdf) as well as the section on Dispatchable loads
beginning on page 20.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
g the unit-decommitment. If I'm
correct, I'm not sure why they are included in Matpower.
Is there a way to include them?
It is true that the start-up costs are not used by any of the
algorithms in MATPOWER. I suppose you could modify the unit-
decommitment code in uopf.m to include them i
= 409, Lead = -187.
Is this the
data which would go in columns 4 and 5 generator input?
thanks,
shane.
Quoting Ray Zimmerman :
That is the correct field to enter the generation info. But, if bus 1
is set as the slack bus, the entered value for gen 1 will be ignored
and replaced b
A, l, u matrices from a .mat file or something and then
call opf with the additional arguments.
Hope this helps,
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
x27;s Manual (http://
www.pserc.cornell.edu/matpower/manual.pdf).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 26, 2007, at 5:23 AM, Wu Jun wrote:
Hi all,
From the case30.m in Matpower, Vmax and Vmin for buse
two markets. What do you do with that?
Writing code to automatically generate the case files for the
separate markets as well as the combined one is going to be pretty
involved. And then, if you move to more than 2 systems ... sounds
very messy.
--
Ray Zimmerman
Senior Research Associate
only.
Ray
2007/4/26, Ray Zimmerman :
By default, the power flow solver does not take into account the
voltage or reactive power limits. However [1] ...
For the AC power flow solvers, if the ENFORCE_Q_LIMS option is set
to true (default is false), then if any generator reactive
one of the files in the new
version and should be in your path.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 27, 2007, at 1:27 AM, Jun Wu wrote:
Dear Ray Zimmerman,
Is the higher version compatible with the low
set the Qmax and Qmin of bus 1 to
zero so that I think the Q calculated should also be zero. But it
is not zero by using 3.0b3 while it is zero by using 3.0.0 or 3.1b2.
By the way, I want to ask another question. If the initial values
of Vg should be 1 or other?
2007/4/27, Ray Zimmerman
AM, Jun Wu wrote:Dear Ray Zimmerman,Did you see the letter I sent to your mailbox? Maybe it's a supplement for this problem. == After exhaustive tests for parameters setting of Matpower, I found a problem, maybe a bug. Qmax and Qmin ca
That's correct ... it was a trivial fix.
Ray
On Apr 30, 2007, at 12:25 PM, Jun Wu wrote:
Do you mean that the bug can be fixed by replacing the original
file with this version of pfsoln.m? How fast you work!
2007/4/30, Ray Zimmerman :
Yes. I did see your mail. I am attach
I am using this version. I tried to deal with the problem by the attachment you have given, but it doesn't work. 2007/5/1, Ray Zimmerman <r...@cornell.edu>: That's correct ... it was a trivial fix. RayOn Apr 30, 2007, at 12:25 PM, Jun Wu wrote: Do you mean that the bug can be f
ints into
the network model?
Yes. Use column 6 of the branch matrix. See section 3.1 of the manual
(http://www.pserc.cornell.edu/matpower/manual.pdf) for details on the
case file format.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
ltage setpoints and the ENFORCE_Q_LIMS option set to true. Be aware
that this could cause line limits to be violated.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May 8, 2007, at 7:52 AM, Sarina Adhikari wrote:
Dear
Unfortunately, the current version of MATPOWER does not include
continuation power flow.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May 8, 2007, at 9:46 PM, Sarina Adhikari wrote:
Dear Mr. Ray,
Thank you
opt = mpoption('ENFORCE_Q_LIMS', 1);
runpf('case9', opt);
This requires version 3.0.0 or later.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May 9, 2007, at 2:44 AM, Mala De wrote:
Please
. Does it represent the necessary
conditions as in an ordinary optimization process? How does it
affect the solution of OPF?
Hoping for your quick reply.
thank you.
On 5/8/07, Ray Zimmerman wrote:
It is not possible to do this directly with the OPF. I'm not sure
if this will accom
Carlos,
Do you have an account on the ECE system here? If so, you should be
able to log in to amdpool.ece.cornell.edu which I think is what you
need. I may be able to do this if you are not able to get access to
anything.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall
Sorry list, that was meant for Carlos only.
Ray
On May 16, 2007, at 1:18 PM, Ray Zimmerman wrote:
Carlos,
Do you have an account on the ECE system here? If so, you should be
able to log in to amdpool.ece.cornell.edu which I think is what you
need. I may be able to do this if you
mming. They
most certainly are ... try changing which bus is the reference bus
(slack/swing bus) and you will see the solution change.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
file, or
you could pass it into your code in a separate variable.
Feel free to contact me off-list with specific questions if you run
into trouble during implementation.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
(http://www.pserc.cornell.edu/matpower/manual.pdf).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Jun 15, 2007, at 4:48 AM, Fortunato Villella wrote:
Dear all,
I just joined the mailing list.
I'm tryin
Transformer taps are assumed to be fixed, for both power flow and
optimal power flow simulations.
Ray
On Jul 6, 2007, at 7:37 AM, Boko Soo wrote:
I wonder how MATPOWER adjusts the Transformer Tap when the power
flow is simulated.
Thank you.
Building a website is a piece of cake.
Did you check section 3.1 of the users's manual (http://
www.pserc.cornell.edu/matpower/manual.pdf) or read the output of
help caseformat
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Jul 13, 2007, at 10:36
On Jul 14, 2007, at 12:31 AM, sdumxx wrote:
I found a function in loadcase.m
function [gen, branch] = mpc_1to2(gen, branch)
it expands the struct of version 1 to 2, doesn’t it?
Correct.
On Jul 14, 2007, at 1:33 AM, sdumxx wrote:
I want to include gen array with PC1, PC2, QC1MIN, QC1MAX, ...
MATPOWER does not include the backward/forward power flow method for
radial systems.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Jul 16, 2007, at 12:25 PM, ali jahanbani ardakani wrote:
Hi All.
I am working
I want it
exteremely, please help if someone has it, thanks everybody.I
think we
can add it to matpower.
On 7/17/07, * Ray Zimmerman* mailto:r...@cornell.edu>> wrote:
MATPOWER does not include the backward/forward power flow
method for
radial systems.
--
Ray Zimmerman
ut of order for
some reason.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Jul 17, 2007, at 8:50 AM, Jovan Ilic wrote:
Would you consider your PhD still up to date or can you give us a
reference to some
e you attempting to build for?
I assume none of our pre-built MEX files work for your architecture?
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
different MEX
file. If you have a file for that architecture please let me know.
Otherwise, I will try to contact the author.
Best regards,
Amir
On Aug 29, 2007, at 9:36 AM, Ray Zimmerman wrote:
On Aug 27, 2007, at 6:44 PM, Amir Globerson wrote:
I'm trying to compile the mex file for BPMPD
Hmmm ... please send me (off-list) the output of the 'mpver' command.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 22, 2007, at 4:04 PM, Henry Louie wrote:
Hi Ray,
Thank you so much for the n
MATPOWER is a tool for power flow and optimal power flow studies for
electric power systems. Please see the User's Manual www.pserc.cornell.edu/matpower/manual.pdf> for details on how to get
started. If you have specific questions, I am happy to try to answer
them.
--
Ray Zimmerma
and please?
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Sep 27, 2007, at 2:00 PM, Rafael Castellanos Bustamante wrote:
Dear Ray Zimmerman
I obtain the next error when I run a opf of a large grid, for
instance
You are correct. Thank you.
Ray
On Nov 5, 2007, at 5:27 PM, Dirk Van Hertem wrote:
hello all,
I think there is a small documentation bug in version 3.2 of matpower.
In the help of "opf.m", the following is stated:
Then, to each element of r a function is applied as encoded in th
I'm an not aware of such a converter. If someone writes one, I would
be happy to include it in a future release.
Ray
On Nov 7, 2007, at 2:28 PM, Nélio Machado wrote:
Hi, this is my first email to this mail list. Unffortunally there is
no MatPower online forum where the past question
name is given in fname. If solvedcase
is
% specified the solved case will be written to a case file in
MATPOWER
% format with the specified name. If solvedcase ends with '.mat'
it saves
% the case as a MAT-file otherwise it saves it as an M-file.
% MATPOWER
% $Id: runopf.m
You can turn off output printing with mpoption(). The solution can be
captured in the return values of the rundcpf() function. This does not
save anything to disk, so it should be quite fast.
mpopt = mpoption('OUT_ALL', 0);
[baseMVA, bus, gen, branch, success, et] = rundcpf('case9', m
mpting to
dispatch generation in a way that results in zero flow on the line.
This may not be possible. Make sure that you check the "success"
return variable from rundcopf to make sure that it is finding a
solution. If "success" returns a false value, it probably
alk about LAO
vs. FRO vs. etc, etc. for markets solved by OPFs. Typically, they just
use the lambda's directly, which corresponds to what I call the 1st
price auction in MATPOWER.
Hopefully, that helps,
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
Thanks for pointing this out. The bustypes() function is only intended
to be used on data that has been converted to internal consecutive bus
number via the ext2int() function. And, within MATPOWER it is always
used that way. Your updates do allow it to work on systems that have
not been co
equal to its offer.
Now, I should mention that I've never seen anyone else talk about
LAO vs. FRO vs. etc, etc. for markets solved by OPFs. Typically,
they just use the lambda's directly, which corresponds to what I
call the 1st price auction in MATPOWER.
Hope this helps,
--
I do not have a converter. If anyone wants to volunteer to write one,
I'd *gladly* include it in a future version of MATPOWER.
Ray
On Dec 2, 2007, at 6:54 PM, ahmed haidar wrote:
Dear Mr. Ray Zimmerman,
The data attached here is in PSSE format.Is there any possibility to
convert
I believe you can accomplish what you want using dispatchable loads.
Please have a look at the section on dispatchable loads in the manual.
Another option is to add fake generators to model the curtailments.
Ray
On Jan 30, 2008, at 9:45 AM, Boko Soo wrote:
Hello,
1. Suppose I want t
the bus, branch and gen matrices.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Feb 5, 2008, at 8:19 AM, Silas Stephen wrote:
Hi,
I am Silas Stephen doing my research in the area of research.
I would like to know
re in bus(:, LAM_P), etc, etc.
Type, 'help idx_bus' to see what the various columns of the bus matrix
are. Similarly, for 'idx_gen' and 'idx_brch'.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 2
directory and described in Appendix C in the User's Manual. (Use
auction type 5).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
and resources. We do not have any plans for
SCADA and MATPOWER.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
d for Intel Core 2, if I get a chance (no promises).
What versions of Linux and Matlab are you using?
With all of the Matlab versions, OS versions, compiler versions, etc,
this MEX support is getting to be a real nightmare.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Co
Tangent vector in CPF
[ ] . Using Tapchanger, AVR, Generator dynamics, and other dynamic
componenets
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Feb 19, 2008, at 10:34 AM, Mesgarnegad, H. wrote:
Dear Sirs,
I
That looks correct for 'opf', but without details of how it failed I can't guess what the problem might be. Regarding 'uopf', the version in MATPOWER 3.2 does not include the ability to pass in the user defined linear constraints and costs. I've attached a version of uopf.m that does. This feature
rsion).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 9, 2008, at 9:48 AM, saikat wrote:
Dear Members,
I am wondering how MATPOWER solves the OPF problem with nonlinear
power balance equations by using L
angle reference and a real power slack in the PF problem.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 17, 2008, at 1:45 PM, kanwardeep singh wrote:
Dear Dr. Ray,
I have a querry
hen creating a new case, it is always a good idea to make sure
that you can successfully solve a power flow, before attempting an
OPF, but without more information it is impossible to know what is
happening in your case.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornel
I'm not sure, but it is likely an incompatibility between your
versions of Matlab and MINOPF. If you are using Matlab 7.3 or later on
Windows, please use the latest versions (3.2) of MATPOWER and MINOPF.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell Unive
Most likely it is related to the issue in the FAQ ...
http://www.pserc.cornell.edu/minopf/#faq
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Mar 30, 2008, at 2:57 PM, Tatiana A. Vaskovskaya wrote:
After
tible to the date in this
website:
http://www.ee.washington.edu/research/pstca/
, or they are different kind of source and data?
If you type 'help case14', etc. you will see in the documentation for
the file, that each of these cases was converted from the data on that
web-site.
hat are causing it to die, and I'll see if I
can reproduce it here.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 21, 2008, at 10:32 AM, mathieu.salzm...@epfl.ch wrote:
Hi,
I have downloaded BPMPD_
utive bus numbers for MATPOWER's computations. The
data for case300 came directly from the IEEE data on the U Wash
website (http://www.ee.washington.edu/research/pstca/).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 29, 2008, at 11:43 AM, hui.zh...@tu-ilmenau.de wrote:
Dear Sir or Madam,
Thank you very much for your help!
And now I have some more questions about the control variables
in OPF.
1.) With the data of your cases,which variables could be
considered as
control variables?
equality
constraints. With nb buses and ng generators, we have 2*nb + 2*ng
variables and 2*nb + 1 equality constraints (power flow equations and
reference angle) limiting the degrees of freedom.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
ph
Hi Pedro,
First, you should know that the state estimation code is essentially
proof-of-concept code which is included in case it could be helpful to
someone. It is very basic and not very thoroughly tested. In any case,
I'm pretty sure that it does not even take into consideration any of
o the correction of
the generation constraints (in which file) of the opf ? Cause I
hopping that with a copy-paste it will solve the problem no (it may
request some adjustments obviously)?
Thanks again and wishes of a nice weekend
Pedro
- Original Message
From: Ray Zimmerman
Sent: Wedn
7;)' program in Matpower, the
results do
not change. So, how can I get the different results based on the
changes of
Vm(s) for the PV buses with Matpower?
Thanks again!
Have a nice day!
Regards!
Quoting Ray Zimmerman :
On May 5, 2008, at 12:28 PM, hui.zh...@tu-ilmenau.de wr
Unfortunately, the current build of MINOPF 3.2 only works with Matlab
7.3 or later.
Ray
On May 8, 2008, at 5:36 PM, mohsen rahmani wrote:
dear all
I want to use minopf 3.2 for speeding up opf execution. when I place
minopf files into matlab directory and type this command
"mopf('c
I am sorry that I am not able to understand exactly what you are
asking for. MATPOWER does include a full Newton-Raphson based power
flow solver (see runpf.m).
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On May
limits),
upper and lower bus voltage magnitude limits, branch voltage angle
limits (optional), trapezoidal generator capability curve (see pages
17-18 of manual). Piece-wise linear generator costs are also
implemented using additional cost variables and inequality constraints.
Best regards,
--
otal cost curve (not marginal cost). Simply plotting these
points and connecting them with straight line segments, in order, will
give you the total cost curve for that generator.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 2
Again, I'm sorry, but I don't really understand what you are looking
for. If you want to run a Newton-Raphson power flow, just type
something like:
runpf('case30')
If you want to see the code for the power flow algorithm, you can find
it in newtonpf.m.
--
Ray Zimme
);
V = bus(:, VM) .* exp(j * pi/180 * bus(:, VA));
Sd = bus(:, PD) + j * bus(:, QD);
Id = conj(S ./ V);
Hope this helps,
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Jun 5, 2008, at 8:35 AM, javad salehi wrote
5/6/08, Ray Zimmerman wrote:
From: Ray Zimmerman
Subject: Re: please help me!!
To: "MATPOWER discussion forum"
Date: Thursday, 5 June, 2008, 5:40 PM
I assume you are referring to bus load currents? If so, you can use
the fact that s = v * conj(i) to compute them. So Id (the vect
re concerning
about
these information?
Static capacitors would typically appear in the BS and GS columns of
the bus matrix. Dispatchable VAr sources would be modeled as
generators. There is no reason that a generator cannot be modeled with
PMIN and PMAX equal to zero, acting as a completely
>> help compare
COMPARE Compares two solved power flow cases.
compare(case1, case2)
Compares two solved power flow (or optimal power flow) cases and
prints
a summary of the differences.
For example, runcomp() can be used to solve an OPF using two different
methods and compare t
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