Re: Question about state estimation in matpower

The state estimation code is contributed code (not a part of core MATPOWER), so if you don’t get help from others here, I suggest you try contacting the author directly. Ray > On Dec 26, 2018, at 11:11 AM, Mohsen Jorjani wrote: > > Hello > I have a question regarding stat

Re: Question About Not To Display Mpopt

Yes. And, in the future, when posting, please start a new thread (don’t just reply to an existing e-mail) with an appropriate subject line. Ray > On Nov 22, 2018, at 2:33 AM, Sarhan Hasan wrote: > > Hi all > > Please can I runopf after add generator to load bus >

Re: Question About Not To Display Mpopt

Hi  all  Please can I runopf after add generator to load bus  On ‎Tuesday‎, ‎June‎ ‎19‎, ‎2018‎ ‎11‎:‎12‎:‎25‎ ‎PM‎ ‎MDT, Oguzhan Ceylan wrote: Yes, you are right, I reinstalled Matpower and now everything is fine.  thank you very much.oguzhan 2018-06-19 20:23 GMT+03:00 Ray Zimmerman :

Question about "V0" and "initialguess" in state estimation

Hello everyone I'm trying to estimate the states of 30-bus system using run_se.m in Matpower. I've already defined casename, measure, idx and sigma in MATLAB, but I don't know how can I define *V0* and *initialguess*. What do they actually mean? I would appreciate any help. Thank you, Shiva

Re: question about matpower please help to me

I’m not sure I understand your question exactly, but the placement of generators in your system is defined in the case file. You can create your own case file by copying one of the existing ones (like case9.m) and editing it with data from your own system. Ray > On Sep 7, 2018, at 2

question about matpower please help to me

Hello may name is amir ali .I am student . I like work with MATPOWER tool . because MATPOWER is faster simulation in the MATLAB. my subject study is : Distributed generation planning .and use TLBO , PSO algorithm for answers Optimization . ok ! so tow variables 1- where must be generation on the

Re: OPF gives higher PG output than corresponding PMAX - question

The power flow does not enforce any limits (generator, voltage or branch flow limits). The only exception is that it will attempt to enforce generator reactive limits if the pf.enforce_q_lims option is true, which it does by relaxing the voltage setpoint at the generator when the reactive limit

Re: Question on MATPOWER program....please reply to this email address.

equal to PMAX, both set to the desired production level for the OPF run in question. Ray > On Apr 21, 2018, at 5:28 PM, Khawla Munawwer <khawlamunawwer...@gmail.com> > wrote: > > Can someone help me with dispatching the load or how to add a solar to power > gene

Question on MATPOWER program....please reply to this email address.

Can someone help me with dispatching the load or how to add a solar to power generation to limit the voltage violations.Following are the objectives: I want to Run 24-­‐‑hour simulations and report the voltage, losses and line loading. If the voltage violates the standard limits of 0.95 PU – 1.05

Re: Question about shadow price of line flow constraints in AC OPF

Dear Ray, Thank you very much! It is a very smart way to deal with that. How could I not realize that in the first place? Thank you very much! Kind regards, Jin 2018-04-20 4:51 GMT+10:00 Ray Zimmerman <r...@cornell.edu>: > Dear Jin, > > In response to your original question.

Re: Question about shadow price of line flow constraints in AC OPF

Dear Jin, In response to your original question. You are correct. However, if the flow limit is binding (which it is when the shadow price is non-zero), then the apparent power flowing in the line is equal to RATE_A. So I just use RATE_A since it is readily available. Ray > On Apr

Re: Question about shadow price of line flow constraints in AC OPF

Lagrange multipliers to LMP components. > > > > Hope it helps. > > Best, > > Sarmad > > *From:* bounce-122459850-74036...@list.cornell.edu [mailto: > bounce-122459850-74036...@list.cornell.edu] *On Behalf Of *Ma Jin > *Sent:* Wednesday, 11 April, 2018 5:2

RE: Question about shadow price of line flow constraints in AC OPF

multipliers to LMP components. Hope it helps. Best, Sarmad From: bounce-122459850-74036...@list.cornell.edu [mailto:bounce-122459850-74036...@list.cornell.edu] On Behalf Of Ma Jin Sent: Wednesday, 11 April, 2018 5:24 PM To: MATPOWER discussion forum Subject: Re: Question about shadow price of line flow

RE: Question about shadow price of line flow constraints in AC OPF

) marginal prices at respective nodes. Hope it helps. From: bounce-122459082-74036...@list.cornell.edu [mailto:bounce-122459082-74036...@list.cornell.edu] On Behalf Of Ma Jin Sent: Wednesday, 11 April, 2018 8:04 AM To: MATPOWER-L@cornell.edu Subject: Question about shadow price of line flow constraints

Re: Question on Storage in MOST UC

Currently, I believe the only way to dissipate energy from the storage (as opposed to discharging into the grid) is via the LossFactor described in Table 5-2. This factor can be modified per period using a profile, but it’s defines the fraction of the stored energy that is dissipated, as

Question on Storage in MOST UC

Hello, I am looking to model a more ‘portable’ storage unit (like an EV) in MOSTs UC (stochastic). I am using the ‘commitKey’ to simulate that the storage is disconnected, or at least not available during that time period. During this time period, I would like to reduce the SoC of the storage

Re: The question about extend OPF and the optimization tool

;neuqxhlin...@163.com" <neuqxhlin...@163.com> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Date: Wednesday, January 17, 2018 at 4:46 AM To: "matpowe...@list.cornell.edu" <matpowe...@list.cornell.edu> Subject: The question about extend OPF an

The question about extend OPF and the optimization tool

...@cornell.edu] 发送时间: 2018年1月11日 23:56 收件人: neuqxhlin...@163.com <mailto:neuqxhlin...@163.com> 主题: Re: The question about extend OPF and the optimization tool (FYI, in the future, please address such questions to the <http://www.pserc.cornell.edu/matpower/mailinglists.html#discusslist>

转发: The question about extend OPF and the optimization tool

...@cornell.edu] 发送时间: 2018年1月11日 23:56 收件人: neuqxhlin...@163.com 主题: Re: The question about extend OPF and the optimization tool (FYI, in the future, please address such questions to the <http://www.pserc.cornell.edu/matpower/mailinglists.html#discusslist> MATPOWER-L mailing list, not to me di

Re: Question about the continuation power flow

122159463-73493...@list.cornell.edu> on behalf of Young-Hwan Lee <le...@umbc.edu> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> Date: Thursday, December 28, 2017 at 10:13 AM To: "MATPOWER-L@cornell.edu" <MATPOWER-L@cornell.edu> Subject: Question ab

Question about the continuation power flow

To whom it may concern, I'm trying to solve an easy problem with case39 using the continuation power flow. I set the base case as origin, which is PG, PD, QD are all zero. I do not change any values for the target case, which means I just use the initial values. In addition, I set the reactive

Re: A question about the CPF program of matpower 6.0.

in the manual where the target case is simply the base case with generation and load increased by a factor of 2.5. Ray > On Aug 17, 2017, at 8:30 AM, hushuai1...@foxmail.com wrote: > > I want to ask a question about the CPF program of matpower 6.0. > <Catch(08-17-20-30-05).jpg> &g

Re: question about mpc case model

st create a new > row in "mpc.gen" (note: please do not forget the corresponding row in > "mpc.gencost") and fill it with the data of a new generator. To model > multiple loads, you can add them up to the corresponding bus in "mpc.bus". > For your second question, pl

Re: question about mpc case model

you can add them up to the corresponding bus in "mpc.bus". For your second question, please keep in mind that a slack bus could have both generators and loads. Best regards, Gang On Wed, Jul 12, 2017 at 7:10 PM, Xian Guo <guoxian2...@gmail.com> wrote: > Hi, > > I have a qui

question about mpc case model

Hi, I have a quick question about the mpc case modelling file. Could I have multiple generators and loads connecting to the same bus? If so, how to model this in "mpc.bus", "mpc.gen", "mpc,gencost" matrix? Also, for the slack bus, if I have both generators and

Re: question about co-simulation

What I would recommend is making a slight modification to newtonpf.m , where you insert at line 102 a call to a function defined by you, to which you pass the complex bus voltage vector V and anything else you need (e.g.

question about co-simulation

Dear users, I have interest in perform a transmission (Matpower) - distribution (OpenDSS) load flow by means of co-simulation. Is there anybody who knows how can I access to each iteration of Matpower? Thanks in advance. Jose Vivas École de Technologie Supérieure Montréal, Canada

Re: question ask about calculate UC problem in matpower

individual single hour problems to see if they solve. If so, try relaxing ramp rates. Also, it seems as though you figured out how to set the load profile, but just in case, here’s the response I wrote to the question you sent me off-list the other day, in case it’s useful … You definitely do

question ask about calculate UC problem in matpower

Dear professor: I try to use matpower to calculate the Unit Commitment problem of a load profile of 24h in IEEE30 bus. And I refer to the example of 3 buses in most_ex6_uc.m, and change the case file to case30 and write the code in the following way to set the load profile: profiles =

Re: MOST Question regarding Quadratic Gen Costs

Hello everyone, I am working on the continuation power flow technique. I have used the given 30 bus data for the continuation power flow and i have increased all the loads by a factor of 5, which results in the decreased in the voltage magnitude and the lowest voltage is found to be at bus 8. Now

Re: MOST Question regarding Quadratic Gen Costs

This is a solver issue. See footnote 5 on page 10 of the MOST User’s Manual . For MIQP problems, that is, unit commitment problems with quadratic generator costs and/or ramping wear and tear costs, you will need Gurobi, CPLEX or

MOST Question regarding Quadratic Gen Costs

Hello all, I have been able to succesfully run MOST for several days, but I recently came across a problem when attempting to load cost data into mpc.gencost. I My original gencost was below: mpc.gencost = [ 20022000; 20023000; 2002

Re: Question about the Unit of the Jacobian Matrix

Everything is in p.u. except voltage angles which are in radians. So, (c) and (d). I’ll add a note to clarify this in the help text for the function. Ray > On Mar 21, 2017, at 5:32 PM, Steven Geng <steven.geng.2...@gmail.com> wrote: > > Dear Matpower Users/Developers, >

Re: Question about how to set load-profile in dynamic optimal power fow

Hello sir, I just want to ask you a silly question.. I tried a lot, but i m not able to understand, hoe the savecase function work.? Can you please explain with an appropriate exapmle.? On Tue, Mar 21, 2017 at 9:29 PM, Ray Zimmerman <r...@cornell.edu> wrote: > At the moment, ther

Re: Question about how to set load-profile in dynamic optimal power fow

>> -- 原始邮件 -- >> 发件人: "Ray Zimmerman";<r...@cornell.edu <mailto:r...@cornell.edu>>; >> 发送时间: 2017年3月17日(星期五) 晚上11:05 >> 收件人: "MATPOWER Discussion List"<matpower-l@cornell.edu >> <ma

Re: Question about how to set load-profile in dynamic optimal power fow

. > > thanks > Tian > March 18, 2017 > > > -- 原始邮件 -- > *发件人:* "Ray Zimmerman";<r...@cornell.edu>; > *发送时间:* 2017年3月17日(星期五) 晚上11:05 > *收件人:* "MATPOWER Discussion List"<matpowe

Re: Question about how to set load-profile in dynamic optimal power fow

; the attachment is the program which i rewrited. > > thanks > Tian > March 18, 2017 > > > -- 原始邮件 -- > 发件人: "Ray Zimmerman";<r...@cornell.edu>; > 发送时间: 2017年3月17日(星期五) 晚上11:05 > 收件人: &

Question about how to set load-profile in dynamic optimal power fow

Dear all I need help about dealing with the dynamic optimal power flow through most. if there are not only one bus load which are varying with time,how to set the load-profile (for example in ex_load_profile).It will be much better and clearer,if i get a simple example. thanks

Re: CPF Question

@tamu.edu<mailto:peerz...@tamu.edu>> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> Date: Sunday, March 5, 2017 at 1:37 PM To: MATPOWER discussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>

Re: CPF Question

t; From: Aaqib Peerzada <peerz...@tamu.edu> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Date: Friday, March 3, 2017 at 9:10 PM > To: "matpower-l@cornell.edu" <matpower-l@cornell.edu> > Subject: CPF Question > > Dear Dr. Zimmerman a

Re: CPF Question

t;> Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> Date: Friday, March 3, 2017 at 9:10 PM To: "matpower-l@cornell.edu<mailto:matpower-l@cornell.edu>" <matpower-l@cornell.edu<mailto:matpower-l@cornell.e

CPF Question

Dear Dr. Zimmerman and Friends I have a question regarding CPF in Matpower. In matpower the CPF algorithm plots the bus voltage against the continuation parameter (λ). However I'd like to plot the voltage against the active power at a bus(abscissa ). Is there any specific function that can let me

Re: question about psse2mpc

are removed along with any generators or branches connected to isolated buses" Ray > On Dec 11, 2016, at 11:02 PM, 郭贤 <guoxian2...@gmail.com> wrote: > > Hi, > > Sorry to bother you. I have a question regarding "psse2mpc". After taking > psse data to

question about psse2mpc

Hi, Sorry to bother you. I have a question regarding "psse2mpc". After taking psse data to mpc format, I use "MPC=ext2int(mpc)". It seems that mpc and MPC have different dimensions, as shown in the Figure. [image: 内嵌图片 1] [image: 内嵌图片 2] I cannot understand wh

Re: Question about warning message

Thank you very much, Tatiana 2016-10-25 9:54 GMT-05:00 Ray Zimmerman : > Most MIP solvers do not return constraint shadow prices. So in order to > get those prices, the default is to re-solve the problem with a simple LP > (or QP) solver with the integer variables fixed at

Re: Question about warning message

Most MIP solvers do not return constraint shadow prices. So in order to get those prices, the default is to re-solve the problem with a simple LP (or QP) solver with the integer variables fixed at the values returned by the MIP solver. Sometimes there is a mismatch in the solution between the

Question about warning message

Der Dr Zimmerman and Dr Murillo, I am working with MOST, and I receive a warning message which says the following: "miqps_cplex: max relative mismatch in x from price computation stage = 0.24733" What does it means? Thank you very much in advance, Tatiana Cantillo Enviado con Mailtrack

?????? a question about MOST

to be zero? -- -- ??: "rz10";<r...@cornell.edu>; : 2016??10??4??(??) 3:01 ??: "MATPOWER discussion forum"<matpowe...@list.cornell.edu>; : Re: a question about MOST If the RAMP_30 column of the gen matrix is set to zero this m

?????? a question about MOST

Ah,yes,I forgot! Thank you very much! I got the right result! -- -- ??: "rz10"<r...@cornell.edu>; : 2016??10??4??(??) 3:01 ??: "MATPOWER discussion forum"<matpowe...@list.cornell.edu>;

a question about MOST

Recently, I was learning MOST in the MATPOWER, and I got a question. When I wanted to do an experiment, I found that I do not know how to modify the load value of each load bus in each period. The example only have one load bus in MOST manual. If I have 3 load bus("case6ww.m" file o

?????? AC power flow question

! Thank you very much! -- -- ??: "Ray Zimmerman";<r...@cornell.edu>; : 2016??6??3??(??) 0:09 ??: "MATPOWER discussion forum"<matpowe...@list.cornell.edu>; : Re: AC power flow questio

Re: AC power flow question

, I don’t remember why it was done this way, but I suspect it has something to do with multiple generators at a bus. Ray > On Jun 2, 2016, at 10:05 AM, 严超 <1499730...@qq.com> wrote: > > Dear Sir/Madam, > I have a question with the AC power flow calculation. In Mat

AC power flow question

Dear Sir/Madam, I have a question with the AC power flow calculation. In Matpower 5.1, when AC power flow is calculated, if the q_limt is used, as the manual states that "If any generator has a violated reactive power limit, its reactive injection is fixed at the

Re: A question about transformer modeling with uk, ur

converter for two power system simulation softwares: PSSE@Netomac from Siemens and matpower. Here is a problem with transformer modeling, i've read a lot in this archive but still can't solve it, so i decide to post my question here. My goal is to get the same or a simular power flow convergency u

Re: A question about transformer modeling with uk, ur

t;>> >>> Maybe one of your problems is using uk instead of ux (uk^2 = ux^2 + >>> ur^2)? >>> >>> Nice regards, >>> Chris >>> >>> 2016-05-10 0:33 GMT+02:00 Shuo Chen <shuo.c...@st.ovgu.de>: >>> >>> >&

Re: A question about transformer modeling with uk, ur

matpower users, >>> >>> i'm writing my thesis about a data-converter for two power system >>> simulation softwares: PSSE@Netomac from Siemens and matpower. Here is a >>> problem with transformer modeling, i've read a lot in this archive but >>> still can't

Re: A question about transformer modeling with uk, ur

can't solve it, so i decide to post my question here. My goal is to get the same or a simular power flow convergency using the Newton's method after converting the net topology from one to the other. However, I'm stucked when I try to convert a Netomac net into a matpower case. Comparing the PF resu

Re: A question about transformer modeling with uk, ur

ystem > simulation softwares: PSSE@Netomac from Siemens and matpower. Here is a > problem with transformer modeling, i've read a lot in this archive but > still can't solve it, so i decide to post my question here. > > My goal is to get the same or a simular power flow convergency using the &

A question about transformer modeling with uk, ur

question here. My goal is to get the same or a simular power flow convergency using the Newton's method after converting the net topology from one to the other. However, I'm stucked when I try to convert a Netomac net into a matpower case. Comparing the PF results of the 2 softwares

Re: Question

a very straightforward modification to the existing toggle_reserves() <http://www.pserc.cornell.edu/matpower/docs/ref/matpower5.1/toggle_reserves.html>. Ray > On Apr 2, 2016, at 5:53 PM, pourahmad...@ee.sharif.edu wrote: > > Thanks for your response Dr. Zimmerman. I have another

Re: question about losses

-printed output. > > > > Best regards, > > > > Gang > > > > *From:* bounce-120330262-73377...@list.cornell.edu [ > mailto:bounce-120330262-73377...@list.cornell.edu > <bounce-120330262-73377...@list.cornell.edu>] *On Behalf Of *Houssem > *Sent:*

Re: question about losses

-120330262-73377...@list.cornell.edu [mailto:bounce-120330262-73377...@list.cornell.edu] *On Behalf Of *Houssem *Sent:* Sunday, April 03, 2016 11:29 AM *To:* MATPOWER discussion forum *Subject:* question about losses Dear All I have a small question about losses in matpower . I have run a small

question about losses

Dear All I have a small question about losses in matpower . I have run a small program with 3 buses in matpower 4.1. The obtained results are: | Branch Data

Re: Question

Thanks for your response Dr. Zimmerman. I have another question about using�RUNOPF_W_RES. Since the value of reserve must be non-negative in this function, how can I consider downward spinning reserve? Can I consider upward and downward reserves simultaneously? Best Regards

Question

Hi, I want to run an AC optimal power flow with fixed zonal reserves and co-optimize reserves and energy via using MATPOWER5.1. RUNOPF_W_RES. I have a question about obtaining locational marginal price (LMP). As this problem used in MATOPWER is completely non-convex, is it valid to take

Re: power flow question

l.edu>> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.cornell.edu>> > Date: Thursday, February 18, 2016 at 10:34 AM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.corn

Re: power flow question

at 10:34 AM To: MATPOWER discussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> Subject: Re: power flow question I agree that checking for exceeded limits and warning about them would be a nice feature to add to the the power flow. I see no reason, though, why it

Re: power flow question

Hi Jovan, Sorry, I see I misundertood. I had read your proposal as consisting in adding an *equality* constraint, instead of an *inequality* constraint. But as you say, I suspect that such thing would be equivalent to just adding a simple post-calculation check and a warning to the user when PG

Re: power flow question

Jose, I did not suggest to turn the swing bus into a PV bus. There should be at least one swing bus in the system unless you formulate your PF problem as ACOPF problem which does not need any slack buses. I understand what you are saying and you are right. I'd keep the swing bus as it is just to

Re: power flow question

But you did that, it would no longer be a powerflow calculation. There are good mathematical reasons why the standard powerflow calculation is formulated so that there should be at least one swing bus (where you specify both V and A, leaving P and Q "free"). If you specified V, A, and Pgen at

Re: power flow question

Good point, maybe we should trow a Pgen constraint on the swing buses in the Jacobian. On Wed, Feb 17, 2016 at 5:30 PM, Santiago Torres wrote: > Because the exceding generation is supplied by the swing bus. Normal power > flow does not check power generation limits. >

Re: power flow question

Because the exceding generation is supplied by the swing bus. Normal power flow does not check power generation limits. El 17 feb. 2016 1:58 PM, "Bai, Wenlei" escribió: > Dear Ray, > > I tried to modified load of ‘case9’ to exceed the total generation > capacity purposely.

Re: power flow question

ussion forum <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> List-Post: matpower-l@cornell.edu Date: Wednesday, February 17, 2016 at 12:57 PM To: "matpower-l@cornell.edu<mailto:matpower-l@cornell.edu>" <matpower-l@cornell.edu<mailto:matpower-l@cornell.e

power flow question

Dear Ray, I tried to modified load of 'case9' to exceed the total generation capacity purposely. To my surprise, power flow still converges. More specifically, the total generator 'on-line capacity' is 820MW, while the 'actual generation' is 920.8MW Why the actual generation can be larger than

Question about islands.

one branches are connected to 110 KV bus. And after I made branch status 0 of the branches which are connected to 110 KV buses. When I checked for islands (case_info) in my file I found 2 islands and 336 isolated buses. Also I verified it by [group, isolated]=find_island ('myfile'). My question

RE: Question about LMP

whether a generation is constrained. Best Regards, Vh De: bounce-119916284-12657...@list.cornell.edu [mailto:bounce-119916284-12657...@list.cornell.edu] En nombre de Sarmad Hanif Enviado el: jueves, 19 de noviembre de 2015 20:59 Para: MATPOWER discussion forum Asunto: RE: Question about LMP

Re: Question about LMP

usm.cl>> wrote: Dear Prof. Zimmerman, I have a question about Local Marginal Prices (LMP) that are shown in Matpower. The definition of the LMP is the marginal cost of supplying, at least cost, the next increment of electric demand at a specific location (node) on the

RE: Question about LMP

Dear Vh, Regarding your question: why LMP doesn’t include the Lagrange multipliers related to generation inequality constraints The answer is it does!! As Carlos explained: f'(Pg1) + mu_+ - mu_-- \lambda_P1 = 0 or \lambda_P1 = f'(Pg1) + mu_+ - mu_- Your dual problem should also state

Re: Question about LMP

I think your question is whether MATPOWER includes a solver for a DCOPF with losses. The answer is that currently it does not. Ray > On Nov 19, 2015, at 4:55 AM, Kanis Kanis <kaniskanis...@gmail.com> wrote: > > Dear all, > > I would like to ask something more abo

Re: Question about LMP

nt > prices when the lines is congested. Sarmad, I’ve verified your idea. Despite > the fact that the shadow price for the minimum or maximum is active, the LMP > shown are the same for all buses. > My question is about why LMP doesn’t include the Lagrange multipliers related > t

RE: Question about LMP

, I’ve verified your idea. Despite the fact that the shadow price for the minimum or maximum is active, the LMP shown are the same for all buses. My question is about why LMP doesn’t include the Lagrange multipliers related to generation inequality constraints. I did a model using the dual

Question about LMP

Dear Prof. Zimmerman, I have a question about Local Marginal Prices (LMP) that are shown in Matpower. The definition of the LMP is the marginal cost of supplying, at least cost, the next increment of electric demand at a specific location (node) on the electric power network, taking

Re: Question about LMP

or loss cost the energy can be distributed to all nodes at the same price. Regards, Jovan Ilic On Wed, Nov 18, 2015 at 4:37 PM, Victor Hugo Hinojosa M. < victor.hinoj...@usm.cl> wrote: > Dear Prof. Zimmerman, > > I have a question about Local Marginal Prices (LMP) that are show

Re: Question about sparsity-based implementation in MATPower

o <sra...@asu.edu> wrote: > >> Greetings Dr. Marin, >> >> In the variant of HELM, do you use backslash as well? The reason I ask >> this question is, one of the advantages of the HELM is that the matrix does >> not change for a given static problem (not co

Re: Question about sparsity-based implementation in MATPower

;mari...@gridquant.com> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Date: Monday, October 19, 2015 at 12:15 PM > > To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Subject: Re: Question about sparsity-based implementation in

Re: Question about sparsity-based implementation in MATPower

Greetings Dr. Marin, In the variant of HELM, do you use backslash as well? The reason I ask this question is, one of the advantages of the HELM is that the matrix does not change for a given static problem (not considering bus-type switching and tap changing etc.). As far as I know and I might

Re: Question about sparsity-based implementation in MATPower

a...@asu.edu <mailto:sra...@asu.edu>> > Reply-To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:matpowe...@list.cornell.edu>> > Date: Sunday, October 18, 2015 at 8:31 PM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu > <mailto:mat

Re: Question about sparsity-based implementation in MATPower

ruti, >>> MATPOWER does use “\” operator for the linear solves. However note >>> that, internally, MATLAB does perform some sort of matrix reordering to >>> reduce the fill-ins in the factored matrix. For instance, UMFPACK uses an >>> approximate minimum degree r

Re: Question about sparsity-based implementation in MATPower

of matrix reordering to >> reduce the fill-ins in the factored matrix. For instance, UMFPACK uses an >> approximate minimum degree reordering scheme by default. >> >> Shri >> >> From: Shruti Rao <sra...@asu.edu> >> Reply-To: MATPOWER discussion forum &l

Re: Question about sparsity-based implementation in MATPower

matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>> Subject: Question about sparsity-based implementation in MATPower Greetings MATPower community, I had a question about the way sparsity-based techniques are used in the Newton-Raphson solver of the power flow algorithm in MA

Question about sparsity-based implementation in MATPower

Greetings MATPower community, I had a question about the way sparsity-based techniques are used in the Newton-Raphson solver of the power flow algorithm in MATPower. I ran the code step-by-step and from my understanding, the way the sparsity of the Jacobian matrix is exploited

Re: Question about sparsity-based implementation in MATPower

WER discussion forum <matpowe...@list.cornell.edu> > Date: Sunday, October 18, 2015 at 5:37 PM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Subject: Question about sparsity-based implementation in MATPower > > Greetings MATPower community, > > I had a que

Re: Question about sparsity-based implementation in MATPower

...@list.cornell.edu>> Subject: Re: Question about sparsity-based implementation in MATPower Thank you Dr. Abhyakar, My main aim was to confirm that MATPower uses the inbuilt "\" to solve the matrix equations and not Tinney or some other form of reordering and then LU factorizat

Re: Question about sparsity-based implementation in MATPower

...@list.cornell.edu> > Date: Sunday, October 18, 2015 at 8:31 PM > To: MATPOWER discussion forum <matpowe...@list.cornell.edu> > Subject: Re: Question about sparsity-based implementation in MATPower > > Thank you Dr. Abhyakar, > > My main aim was to confirm that M

Question about the user defined cost constraints

Dear Professor: I am a Matpower beginner. I have read some of the emails in Email Archive. And I've learned a lot from those email. But I still have some questions to ask. 1) There is not a lot description about matrix A in 6.3.2 user-defined constraints. Could you please give me a further

OPF question convergence

Dear all, I have a very strange problem using the matpower function runuopf. I launch several iteration of runuopf and one case give me a non convergent solution (success flag is zero). Within my code, I save the values the runuopf function uses, so it goes: save casefileresultsOPF =

Question regarding scaling the loads and generation in MATPower

Hi all, I was trying to scale the loads and generation in MATPower using the following lines: clc;clear all; define_constants; mpcb = loadcase('case118'); % load base case mpct = mpcb; % set up target case with mpct.bus(:, VM) = 1; mpct.bus(:, VA) = 0; mpct.gen(:, VG) = 1; mpopt =

Re: Question regarding scaling the loads and generation in MATPower

I am extremely sorry about this. Thank you! On Mon, Apr 13, 2015 at 4:48 PM, Ray Zimmerman r...@cornell.edu wrote: I almost started to become superstitious … … then I noticed a typo in the last line before the call to runpf(). Left-hand side has QD, right-hand side has PD. Ray On Apr

Re: Question regarding scaling the loads and generation in MATPower

I almost started to become superstitious … … then I noticed a typo in the last line before the call to runpf(). Left-hand side has QD, right-hand side has PD. Ray On Apr 13, 2015, at 3:58 PM, Shruti Rao sra...@asu.edu wrote: Hi all, I was trying to scale the loads and generation in

One Question

Hi, everyone Is MATPOWER able to analysis unbalanced load flow? I have many unbalanced load in a distribution system and i want to run load flow. Thanks

<    1   2   3   4   5   >