. Hence I wrote my own code. I wonder can I use the
runcpf code for a 14-generator 59 bus system at a selected bus? How do we do
that?
Best,
Nur
On 25 May 2015, at 8:28 am, Abhyankar, Shrirang G.
abhy...@anl.govmailto:abhy...@anl.gov wrote:
Hi,
You might want to try MATPOWER’s continuation power
the voltage against the reactive power load. Is it
possible to do this using the continuation power flow method?
Thank you
Hiranya
On 24 May 2015, at 23:28, Abhyankar, Shrirang G.
abhy...@anl.govmailto:abhy...@anl.gov wrote:
Hi,
You might want to try MATPOWER’s continuation power flow feature
Hi,
You might want to try MATPOWER’s continuation power flow feature instead of
rolling out your own load increment loop. The reason is that as you increase
the load the Jacobian matrix conditioning worsens and running a simple power
flow may yield a divergent solution. For your case, I would
Every time rundcpf or runpf is called with the only input being the case
filename (or the case struct), it creates the options data structure (via a
call to mpoption()). As you see from the profile logs, creating dynamic structs
in MATLAB is expensive.
You should create the options struct up
I don't know what your algorithm does but I think you can do the same,
determine optimal generation and load, using MATPOWER's optimal power flow
(runopf). runopf supports all the constraints that you've listed.
Shri
From:
disposal a transformer 0.66/20
kV that operates with the nominal transformation ratio.
Could you please help me?
Thank you in advance,
AA
2015-04-01 22:20 GMT+03:00 Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov:
Its not clear what you mean by different outcomes
Although Matpower does not have a function for ATC, it has all the required
building blocks for doing the calculations You can take a look at the
continuation power flow feature in the MatPower manual as a starting point.
Shri
On Apr 1, 2015, at 5:07 AM, Aruna Dharmala
...@gmail.com]
Sent: Wednesday, April 01, 2015 7:07 AM
To: Abhyankar, Shrirang G.
Subject: URGENT
Hello Shri,
Sorry for interrupting you but i have to ask you something relative to
matpower. I know i should send an email to the matpower list but it is kind of
an urgent so please do not disregard it.
I have
1. If you want to incorporate the machine internal emf equation
E’ - (R + jX’)I - V = 0
then you need to have an additional bus and line for each generator in your
test case. The additional bus will have voltage |E’| with an angle angle(E’),
and the line, with impedance R + jX’,
I¹ve started working on adding ZIP load model in MATPOWER. Will try to
update you in a couple of days.
Shri
-Original Message-
From: Ray Zimmerman r...@cornell.edu
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Monday, March 23, 2015 at 10:40 AM
To: MATPOWER
results=rundcpf(mpc);
In the above command, mpc is the input MATPOWER case struct and results is the
output MATPOWER case struct. Each MATPOWER case struct has the fields bus, gen,
branch, area, gencost, and other utility fields. Please read the MATPOWER
manual for the format of each of these
http://www.pserc.cornell.edu//matpower/#pfconvergence
From: #ZHANG TIAN# tzhang...@e.ntu.edu.sgmailto:tzhang...@e.ntu.edu.sg
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Mon, 23 Feb 2015 07:39:09 +
To:
Please check if your base case and target case have the same number of buses.
Shri
From: Amal Elramly amal_...@yahoo.commailto:amal_...@yahoo.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Mon, 23 Feb 2015 12:58:12 +
To: MATPOWER
Arun,
Please help us to understand the meaning of stuck by providing relevant
details of (a) equations you are trying to implement (b) what have you
attempted till now c) code snippets (d) errors/warnings.
Shri
From: arun s nair arunsnair...@gmail.commailto:arunsnair...@gmail.com
Reply-To:
My guess is that you have bus 9 set as a PV bus and hence it's voltage
magnitude is constant.
Shri
On Feb 19, 2015, at 4:47 AM, david clerc
clerc.da...@hotmail.frmailto:clerc.da...@hotmail.fr wrote:
Hello everyone,
First I apologize for my approximate english.
I am working on a student
,
Natakorn Thasnas
Ph.D Student
Khonkaen University, Thailand
2015-02-12 20:41 GMT+07:00 Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov:
Try using a smaller continuation step size.
mpopt = mpoption(mpopt, 'cpf.stop_at', 'full', 'cpf.step', 0.05);
Shri
On Feb 12, 2015, at 4:03
, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
What sort of analysis do you want to run? Such load models are typically used
in system dynamics studies, not for steady-state analysis. If you want to do
dynamics assessment, then MATPOWER is not the tool for you
If you run a continuation power flow in MATPOWER, runcpf(), with the option
'cpf_stop_at' set to NOSE then the CPF will terminate on reaching the nose
point. runcpf() returns a mpc case struct that has details on the generation
and loading at the critical point and the lambda (continuation
I think the runopf routine should update generator set point voltages in the
mpc struct once a solution is found. It is clearly a bug if that's not the case.
I did a quick check on case14 and found that the power flow converges in 0
iterations given an initial guess from the OPF solution. With
Power flow does not enforce line limits. Run an optimal power flow (runopf) to
enforce these limits.
Shri
On Jan 21, 2015, at 3:15 AM, Přemysl Voráč
vo...@ntis.zcu.czmailto:vo...@ntis.zcu.cz wrote:
Hello,
I’m using Matpower to run a power flow problem on case3120sp.m network. I’m
wondering,
If the load is fixed for each hour the what you are doing is fine. If the load
is dispatchable, then use negative generator units.
Shri
On Jan 21, 2015, at 6:21 AM, Carlos Cruzat Hermosilla ccruz...@gmail.com
wrote:
Hi All
I am currently working with the case24_ieee_rts.m and I am
http://www.pserc.cornell.edu//matpower/#pfconvergence
On Jan 20, 2015, at 2:47 PM, Jorge Fernando Gutiérrez Gómez
jferna...@gmail.commailto:jferna...@gmail.com wrote:
Dear Mr. Uzbekov, I think that your case could be an ill-conditioned or an
unsolvable one. In power system problems that means
...@list.cornell.edu
Cc: MATPOWER-L@cornell.edumailto:MATPOWER-L@cornell.edu
MATPOWER-L@cornell.edumailto:MATPOWER-L@cornell.edu
Subject: Re: PF Does not run
It is R2013a
2015-01-18 3:09 GMT+00:00 Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov:
What's its Matlab version
What's its Matlab version?
On Jan 17, 2015, at 5:46 PM, Carlos Cruzat Hermosilla
ccruz...@gmail.commailto:ccruz...@gmail.com wrote:
Hi All
I am trying to run my power flow in a different computer and I got the attached
error . I am pretty sure that it is nothing to do with the code, due to
My guess is that opening those lines is creating islands. Use the function
case_info to extract the islands. See
http://www.pserc.cornell.edu//matpower/#pfconvergence for info on
non-convergent power flow.
Shri
From: Pinak Panda pinak.pand...@gmail.commailto:pinak.pand...@gmail.com
Reply-To:
mpct.bus(:,[PD QG]) = mpcb.bus(:,[PD QG])*2.5
results = runcpf(mpcb, mpct, mpopt);
results.cpf
Thanking in advance
Regards
Nair
On Thu, Jan 15, 2015 at 3:25 PM, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
Arun,
You have the same generation/load for both the base
From: Bijay Hughes bijayhughe...@gmail.commailto:bijayhughe...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Fri, 16 Jan 2015 07:20:42 +0800
To: MATPOWER discussion forum
Arun,
You have the same generation/load for both the base (mpcb) and target (mpct)
cases. What are you seeing is that runcpf is solving the base case over and
over again since there is zero power transfer. Use different generation/load
for mpcb and mpct and run the continuation power flow
branch = tapdata;
[Ybus, Yff, Yft, Ytf, Ytt,Cf, Ct, Yf, Yt] = makeYbus(baseMVA, bus,branch); but
still problem remain same.
Error using opf_args (line 312)
opf_args.m: Incorrect input parameter order, number or type
thanks!
On Wed, Jan 14, 2015 at 6:16 AM, Abhyankar, Shrirang G.
abhy
, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
Are you setting the solution vector (x) size and the indexing information for
extracting the elements from it correctly?
On Jan 8, 2015, at 4:50 AM, Mirish Thakur
mirishtha...@gmail.commailto:mirishtha...@gmail.com wrote
Are you setting the solution vector (x) size and the indexing information for
extracting the elements from it correctly?
On Jan 8, 2015, at 4:50 AM, Mirish Thakur
mirishtha...@gmail.commailto:mirishtha...@gmail.com wrote:
Dear Prof. R. Zimmerman,
I'm master student working on a project
Pgmin = Pgmax = Pg
From: Simone Cochi simoneco...@gmail.commailto:simoneco...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Wed, 7 Jan 2015 21:41:56 +0100
To: MATPOWER discussion forum
See FAQ #5 on the MatPower webpage. http://www.pserc.cornell.edu//matpower/#faq
Shri
From: Zeya Aung [11547809d]
zya@connect.polyu.hkmailto:zya@connect.polyu.hk
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Mon, 5 Jan 2015
Its always best to send query emails directly to the MATPOWER forum as you'll
get suggestions from more than person.
The current OPF in MATPOWER assumes constant tap ratios and phase shifters so
that the Ybus, Yf, and Yt matrices are constant in the optimization. Hence,
these matrices are
Note that a common assumption used in most power flow programs, including
MATPOWER, is that of a balanced three-phase network. This allows the
three-phase network to be reduced to a single phase for analysis. If your
distribution system is _unbalanced_, then MATPOWER's power flow is not the
I think the total load in your system is more than the total active power
output from non-slack generators. Hence, any increase in the load is supplied
by the slack.
Shri
From: Bijay Hughes bijayhughe...@gmail.commailto:bijayhughe...@gmail.com
Reply-To: MATPOWER discussion forum
Do you have a generator at bus 4?
On Dec 9, 2014, at 7:31 PM, Bijay Hughes bijayhughe...@gmail.com wrote:
Hello Matpower Users,
I am having some problems understanding bus data versus branch data. Under
the bus data, I have for example for bus 4, load of 100 MW. However, when I
Please send your case file, code, and instructions on how to run it.
From: lavanya arubolu
arubolulava...@gmail.commailto:arubolulava...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Thu, 4 Dec 2014 09:51:03 +0530
To: MATPOWER
Hi Manish,
I think you'll have to do a multi-period optimization, with appropriate
objective and constraints, for your battery charge/discharge problem. I am not
sure if this can be cleanly implemented only using the MATPOWER API. You may
have to modify some of MATPOWER's code to suit your
Please take a look at the case file format explained in the MATPOWER manual or
do
help caseformat
Shri
From: Bijay Hughes bijayhughe...@gmail.commailto:bijayhughe...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Sun, 7 Dec
Marco,
MATPOWER does not have any in-built rule that changes the status of a bus
from PQ to PV if a generator is incident on it. If you have a generator
declared in the GEN struct with its bus type set to PQ in the BUS struct, then
the bus voltage magnitude and angle are the variables for
Barbetta
2014-11-24 17:12 GMT+01:00 Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov:
Marco,
MATPOWER does not have any in-built rule that changes the status of a bus
from PQ to PV if a generator is incident on it. If you have a generator
declared in the GEN struct with its bus
with their normal values (positive).
Thanks,
Marco Barbetta
2014-11-24 19:29 GMT+01:00 Marco Barbetta
marco.barbetta1...@gmail.commailto:marco.barbetta1...@gmail.com:
Ok, while an eventual negative value for QG represents an absorbed reactive
power, right?
2014-11-24 18:05 GMT+01:00 Abhyankar, Shrirang G
Please send your casefile.
Shri
On Nov 24, 2014, at 5:30 PM, Marco Barbetta marco.barbetta1...@gmail.com
wrote:
Dear all, i'm facing a problem with my network.
I have all PQ buses (some of which are generators, but i need to know how
voltage magnitude change during time in all buses,
Take a look at the routine extract_islands().
Shri
From: Göktürk Poyrazoğlu goktu...@buffalo.edumailto:goktu...@buffalo.edu
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Thu, 20 Nov 2014 09:01:54 -0500
To: MATPOWER discussion forum
See the documentation of makeJac(). It states that Bus numbers must be
consecutive beginning at 1 (internal ordering). case300 is the smallest case
in MATPOWER where the bus numbering is unordered. Call ext2int() before
makeJac() to convert from external (unordered) to internal (ordered) bus
I don't think there should be any issue even if the bus numbers are unsorted. I
tested it with case9.m and there weren't any errors.
Shri
From: Marco Barbetta
marco.barbetta1...@gmail.commailto:marco.barbetta1...@gmail.com
Reply-To: MATPOWER discussion forum
discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Subject: Re: Order of data in mpc struct affect MatPower functionalities?
Thank you again! What about generators' order?
2014-11-09 17:28 GMT+01:00 Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov
Currently, fhere is no support in CPF to enforce generator reactive power
limits. I've started working on it, but I don't know when it will be done and
eventually incorporated in MATPOWER.
Shri
On Oct 31, 2014, at 6:56 PM, Shruti Rao
sra...@asu.edumailto:sra...@asu.edu wrote:
Hi,
I wanted
If you have information about the boundaries of the control areas then you can
set the appropriate information in column 7 of the bus data and divide the
areas. I am assuming, however, in your case that you do not have that
information and are looking for a criterion to create the areas. I
If the cost function is non-smooth then I don't think it can be handled in
MATPOWER.
Shri
From: Tommy k tommy...@gmail.commailto:tommy...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Thu, 23 Oct 2014 20:54:26 +0100
To:
Abhishek,
You have to provide the 'basecasedata' and 'targetcasedata' (run 'help
runcpf' for the meaning of these terms) for runcpf. If no targetcasedata is
provided to runcpf then it assumes that the base case is case9.m and uses an
example targetcasedata created for this case. It will be
getting error.
On Mon, Oct 20, 2014 at 12:33 PM, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
Abhishek,
You have to provide the 'basecasedata' and 'targetcasedata' (run 'help
runcpf' for the meaning of these terms) for runcpf. If no targetcasedata is
provided
Ahmad,
You may get a better response on the OpenDSS, GridLab-D, or PowerGlobe
mailing list.
Shri
On Oct 4, 2014, at 5:22 PM, ahmad rezaee
ahmadrezaee1...@yahoo.commailto:ahmadrezaee1...@yahoo.com wrote:
Dear all
Can anyone help me to find cases of IEEE 33 and 69 bus distribution test
Ambika,
MATPOWER does not have models of renewable energy sources. If you can model
it as a complex power injection at a bus (P_G + j*Q_G), you can plug in that
value in the generator data struct of the case file and run a power flow or an
optimal power flow. Please go through the manual to
solution.
Shri
Le 18/09/2014 00:18, Abhyankar, Shrirang G. a écrit :
Ali,
Firstly, you have an error in the case file. The generator set point
voltage (gen(1,VG) is set to 2 pu which is incorrect. It should be
around 1.0 pu.
Even after setting the generator set point voltage to 1 pu
Ali,
Firstly, you have an error in the case file. The generator set point voltage
(gen(1,VG) is set to 2 pu which is incorrect. It should be around 1.0 pu.
Even after setting the generator set point voltage to 1 pu, the case does not
converge because the loading surpasses the steady state
Gamze,
Please read the output carefully. It displays at the end Did not converge in
16 itérations.
Since the OPF has not converged the displayed results are meaningless.
Shri
On Sep 1, 2014, at 7:16 AM, Gamze Dogan gamgam...@hotmail.com wrote:
Hi,
I want to use dispatchable load in
Please read section 6.3 of the manual 'Extended OPF formulation'.
Shri
From: Bai, Wenlei wenlei_...@baylor.edu
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Fri, 29 Aug 2014 03:09:56 +
To: MATPOWER discussion forum matpowe...@list.cornell.edu,
Engineering
Baylor University, One Bear Place #97356
Waco, TX 76798-7356
(254)405-3320
wenlei_...@baylor.edu
From: bounce-117801146-71172...@list.cornell.edu
[bounce-117801146-71172...@list.cornell.edu] on behalf of Abhyankar,
Shrirang G. [abhy...@mcs.anl.gov
Zahra,
MATPOWER's output options (help mpoption) control what gets printed to the
screen. By default, the bus, branch, system summary, and constraints get
printed out. Turn off the appropriate flags in mpoption to suppress it.
Shri
From: zahra shiravi
Vids,
Implementing your reformulated OPF equations, written in complementarity
form, is non-trivial in MATPOWER as it will require modifying the
variable/equation sizes and muddling with the OPF data structures. Note
that you'll also need additional equations, perhaps expressed in
semi-smooth
Gelli,
I'm not sure whether you have turned on the option pf.enforce_q_lims (help
mpoption) to enforce Q limits for the power flow solver.
Q limits should be applied once the power flow is at, or fairly close, to an
actual solution. If the limits are imposed during the Newton (or gausspf)
On Jul 31, 2014, at 9:17 AM, HEGGIE Alastair
s0822...@sms.ed.ac.ukmailto:s0822...@sms.ed.ac.uk wrote:
Dear all,
Does anyone know if it is possible to convert a load to a dispatchable load if
the load at a bus has negative reactive demand (and positive real demand)?
You can model it as a
Note that what you want to do would give you a sub-optimal solution. You
could try using a larger objective function cost tolerance to have the
optimization terminate early. This can be set via mpoption using the
option mips.costtol (if you are using MIPS, see the corresponding option
for other
On Jul 16, 2014, at 2:04 AM, Gamze Dogan gamgam...@hotmail.com wrote:
Hi, I want to implement the OPF with current limit of the branches, I did
using the option 'OPF_FLOW_LIM',2
This will apply current limits on all branches except those whose flows have
been specified as infinite.
Simone,
Add your generator in the gen data struct in the case file and set its bus
type to PQ.
Shri
On Jul 16, 2014, at 8:31 AM, Simone Cochi
simoneco...@gmail.commailto:simoneco...@gmail.com wrote:
Dear all,
I’m completely new to the power systems simulation. I want to simulate the
Patrick,
The first thing that I would try to do is to make sure 1. and 2. give similar
solution. I would do this by imposing the cross-border flows in 1 as
constraints on the tie-lines in 2. So Smax and Smin of the tie-line would be
set to the cross-border flow value. The OPF may not converge
The 162 bus system is not a part of MATPOWER distribution. You can find the
data for it here
http://www.ee.washington.edu/research/pstca/dyn17/pg_tcadd17.htm
Note that the data is in CDF format so you'll need to convert it to MATPOWER
format using cdf2matp function.
Shri
On Jul 4, 2014, at
The values are in pu.
On Jul 1, 2014, at 7:10 AM, Pieter Jacqmaer pieter.jacqm...@gmail.com
wrote:
Dear matpower community,
Which are the units of the elements of the Ybus matrix you can obtain with
the makeYbus-command? Are they Siemens, or are they expressed in per unit
(pu)?
30, 2014 at 3:25 AM, Abhyankar, Shrirang G. abhy...@mcs.anl.gov
wrote:
PF_MAX_IT_FD option sets the number of iterations for the 'fast decoupled'
algorithm. Are you setting the PF_ALG option to select the fast decoupled AC
power flow?
Shri
On Jun 29, 2014, at 12:37 PM, Fereshteh Moghateli
Is there any good reason why you would want to modify the case file each
time rather than reading the file once and changing the mpc field values
as you need?
Shri
-Original Message-
From: Yi Zong y...@elektro.dtu.dk
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date:
I didn't encounter any errors running dcopf on your example. What error
did you get and what line rating and dispatchable load limits were you
using?
Shri
From: Jiashen Teh jiashen.te...@manchester.ac.uk
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Thu, 5 Jun 2014
Dominic,
There is no post-iteration callback hook for runpf(). If you want to
do some operation at the end of every Newton iteration then you'll need to
modify newtonpf.m,
Shri
From: Hewes, Dominic dominic.he...@tum.de
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date:
The ACOPF in MATPOWER minimizes the generation cost subject to voltage,
line flow, and capacity constraints. The objective function is not
minimization of line losses. Please read the section on Optimal Power Flow
in the manual. http://www.pserc.cornell.edu/matpower/manual.pdf
Shri
From: Angie
MATPOWER cannot model FACTS devices or solve combinatorial problems such
as optimal location.
Shri
From: chukwudi victor suvichtech0...@yahoo.com
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Sun, 4 May 2014 12:37:06 +0100
To: MATPOWER discussion forum
sensitivity index. The book am reading quoted MATPOWER. See attached .I
really need help
Victor
On Sunday, 4 May 2014, 5:02, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
MATPOWER cannot model FACTS devices or solve combinatorial problems such
as optimal location.
Shri
From
This is a Matlab usage question. Please go over some reference on setting
values in a vector.
Shri
On Mar 26, 2014, at 1:58 AM, deepak.
deepak.aash...@gmail.commailto:deepak.aash...@gmail.com wrote:
Sir
I want to change load at each bus for simulating different scenario of
load.
For
From: Tim Chen timtianc...@gmail.com
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Thu, 20 Mar 2014 22:03:47 +0100
To: matpower-l@cornell.edu
Subject: Significant digits in runpf
Hello!
Is there anyway to obtain the loses from runpf calculation, like are
the
Look at the code in makeJac.m
From: ambi ka rambi_2...@yahoo.co.in
Reply-To: MATPOWER discussion forum matpowe...@list.cornell.edu
Date: Sat, 15 Mar 2014 16:54:45 +0800
To: MATPOWER discussion forum matpowe...@list.cornell.edu
Subject: reg pf
Sir,
I wish to get inverse jacobian matrix.Also
On Mar 14, 2014, at 9:10 AM, Jovan Ilic wrote:
Is there something funny about case300? makeJac returns errors.
makeJac() expects internal ordering of buses. Here's a note from the help info
on makeJac
%Bus numbers must be consecutive beginning at 1 (internal ordering).
Hence,
The appendix section 'Data File Format' in the manual details the format for
generator cost data.
From: Angie Joaqui Rendon nani0...@hotmail.commailto:nani0...@hotmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Fri, 28 Feb 2014
On Feb 27, 2014, at 4:40 PM, Angie Joaqui Rendon wrote:
Regards
I'm working with tho OPF in MATPOWER, and i wanted to know which is the model
of costs that the program uses. I need the information to be able to compare
results with other simulators, because of it I must have very well
FERC has recently released a series of papers detailing the history,
formulation, solution techniques, and computational performance of OPF.
http://www.ferc.gov/industries/electric/indus-act/market-planning/opf-papers.asp
Shri
From: OOzy Pal oozy...@gmail.commailto:oozy...@gmail.com
Reply-To:
Ambika,
1) MATPOWER does not model power electronics equipment. Read up relevant
literature on modeling of solar panel inverters for reactive power optimization.
2) Read the MATPOWER manual to learn the power system elements that MATPOWER
models and its associated modeling techniques.
Don't know how I missed this one. My understanding is that the taps are
discrete, not continuous. The formulation presented in the document assumes
continuous taps.
Shri
From: Ray Zimmerman r...@cornell.edumailto:r...@cornell.edu
Reply-To: MATPOWER discussion forum
From: OOzy Pal oozy...@gmail.commailto:oozy...@gmail.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Fri, 21 Feb 2014 22:30:15 +0300
To: MATPOWER-L@cornell.edumailto:MATPOWER-L@cornell.edu
Subject: OPF
Hello,
I have been reading
I believe the power flow and OPF do work for islands provided you have
reference bus in each of the islands. One possibility for the solver failure is
the presence of isolated buses (buses that do not have any transmission lines
connected) in the islands. If there are any isolated buses then
Ambika,
i) nargin and nargout mean 'number of input function arguments' and 'number
of function output arguments' respectively. These are in-built MATLAB utility
functions, not MATPOWER functions.
ii) Could you be more specific about what control variables you are
considering and how you
Are you using BFGS approximated Hessian via the fmincon function or computing
it yourself? What happens if you use your computed Hessian with the interior
point scheme in fmincon?
Shri
From: amel zerigui zerigui_a...@hotmail.commailto:zerigui_a...@hotmail.com
Reply-To: MATPOWER discussion
Can't tell much other than the BFGS approximated Hessian may be resulting in
some incorrect direction. It may also be due to the interior point method
options (initial barrier, scaling) but its hard to say. Using the exact
Hessian, if available, is always better as (i) the sparsity of the
The data format that MATPOWER uses is described in Appendix B of the manual.
http://www.pserc.cornell.edu/matpower/manual.pdf
Shri
From: Hasan Bjaili ha...@bjaili.commailto:ha...@bjaili.com
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date:
:
bounce-112255487-48954...@list.cornell.edumailto:bounce-112255487-48954...@list.cornell.edu
[mailto:bounce-112255487-48954...@list.cornell.edu] On Behalf Of Abhyankar,
Shrirang G.
Sent: 29 January 2014 15:53
To: MATPOWER discussion forum
Subject: Re: numerically failed opf
The numerical divergence
See below.
From: Alexandra Kapetanaki
alexandra.kapetan...@manchester.ac.ukmailto:alexandra.kapetan...@manchester.ac.uk
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Thu, 23 Jan 2014 21:19:27 +
To: MATPOWER discussion forum
: (607) 255-9645
On Jan 21, 2014, at 11:10 AM, Abhyankar, Shrirang G.
abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov wrote:
Those messages are generated by MATLAB. You can turn them off by using the
warning command. But I doubt if you want to suppress these warnings. Matlab's
warning 'Matrix
From:
bounce-112019008-46384...@list.cornell.edumailto:bounce-112019008-46384...@list.cornell.edu
[bounce-112019008-46384...@list.cornell.edumailto:bounce-112019008-46384...@list.cornell.edu]
on behalf of Abhyankar, Shrirang G.
[abhy...@mcs.anl.govmailto:abhy...@mcs.anl.gov]
Sent: 20
Those messages are generated by MATLAB. You can turn them off by using the
warning command. But I doubt if you want to suppress these warnings. Matlab's
warning 'Matrix is singular to working precision' indicates the linear solver's
(backslash operator) failure and as such the results obtained
See below.
From: Petr Kaplunovich pe...@mit.edumailto:pe...@mit.edu
Reply-To: MATPOWER discussion forum
matpowe...@list.cornell.edumailto:matpowe...@list.cornell.edu
Date: Mon, 20 Jan 2014 07:21:40 -0500
To: MATPOWER-L@cornell.edumailto:MATPOWER-L@cornell.edu
Subject: DCOPF taking into
Use the routine makeYbus to construct the Ybus matrix. The nodal voltages
obtained from running the power flow can be found in the bus data. From the
Ybus and the nodal voltages, you can get the nodal currents.
Shri
From: Alexandra Kapetanaki
The KKT conditions for the optimal power flow formulation used in MatPower are
not given in the manual. MatPower uses a standard OPF formulation with voltages
represented in polar form. You should be able to find the KKT conditions for it
from any standard text or by deriving the gradients
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