Re: Re :Re: Question:modelling of FACTS

I'm not really familiar with FACTS modeling. Is the constraint linear or non-linear? If it is linear, then it can be handled easily. If non- linear, then it requires modifying the code. Ray On Nov 28, 2008, at 9:13 AM, kanwardeep singh wrote: Regarding this, I can share that FACTS device

Re: Re: Re: Question on baseMVA

6121 Oldenburg – Germany Fon: +49 441 9722-732 E-Mail: thole.klingenb...@offis.de URL: http://www.offis.de Von:Thole Klingenberg An: "MATPOWER discussion forum" Datum: 29.04.2011 15:38 Betreff:Re: Re: Question on baseMVA Gesendet von: bounce-23463505-19895...@li

RE: Re: ACPTDF

July, 2017 3:01 AM To: MATPOWER discussion forum Subject: Fwd: Re: ACPTDF Hi, Find here attached the codes for makePTDFac from Ray, Let's see yours for comparison -- Forwarded message -- From: "Ray Zimmerman" mailto:r...@cornell.edu>> Date: Apr 26, 2017 5:15 P

Re: Re: Extensible OPF

My address was supplied as a prank. Please delete me from your mailing list. On Wed, Jan 8, 2020 at 3:12 AM Yang wrote: > Dear Ray, > In runopf_w_res() , the zonal requirement is fixed, but I want it to be > flexible, how can I do this ? > Thanks. > > > > > > At 2020-01-03 01:36:43, "Ray Daniel

Re: Re: Unblanced cases

Thanks. Fiaz Ahmad. Then, is there any cases for distribution systems in Matpower? Which are they? Blanced cases are ok. Regards 在2016-12-01 14:13:00，Ji chenhbxia...@hust.edu.cn写道： Hi. Matpower is used for the analysis of transmission systems which are mostly balanced. The case of unbalance o

Re: Re: Unblanced cases

You can use Matpower for balanced distribution case but not the other way round. Just make your file as the ones given casefiles. Have a nice day Regards, FIAZ AHMAD PhD Student, FENS Sabanci University, Istanbul Turkey On Wed, Dec 7, 2016 at 4:14 AM, Ji Chen wrote: > Thanks. Fiaz Ahmad.

Re: Re: modelling wind

, Ray's suggestion is right too. Wu Jun 2007-03-19 发件人： Ray Zimmerman 发送时间： 2007-03-19 21:45:58 收件人： MATPOWER discussion forum 抄送： 主题： Re: modelling wind 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 >

Re: Re: modelling wind

is applied, > the relationship between the P and Q of the wind farm is complex due to the > control rules. > Of course, Ray's suggestion is right too. > > Wu Jun > 2007-03-19 > > > > ·¢¼þÈË£º Ray Zimmerman > ·¢ËÍʱ¼ä£º 2007-03-19 21:45:58 > ÊÕ¼þÈË£º

Re: [*] Re: basic inquiries

Hi, I am Ph. D student (IIT Kanpur, India) working on the same topic. Which type of help you need. Can you describe the meaning of Help? Julio López > Hi > > Greetings > > Anyone have experience with the transmission expansion planning I need > help. > Tanks > > Cesar > -- ***

Re: Re: Transformer modelling

omit the branch ratio ( N=1 instead of N=2 ). What is the field 'ratio' for? can anybody explain? -- Von:Thole Klingenberg An: Kopie: Datum: 05.05.2011 14:12 Betreff:Re: Transformer modelling Gesendet von: bounce-25655578-19895...@list.cornell.edu Hi, c

Re: [Fwd: RE: Question]

If BPMPD_MEX is called via qps_matpower, as it is when running a DC OPF in MATPOWER, then the solution is checked for feasibility. If the solution fails the feasibility check, then the WARNING is printed and the problem is re-solved using MIPS. So, your results should be correct, it's

Re: Re: P_V curve

Dear Sir, Have a nice day I am not working in the area of Voltage stabilty.Its better if you contact Prof. Atul Phadake, he has completed his Ph.D in this area With regards Deodatta Y. Shingare, Lecturer in Electrical Engineering, Govt. Polytechnic, KARAD. Presently:

Re: Auto Response: Re: savecase

Respected Mohamed Abd-alrahman Gabr *I have been working on DC State Estimation and need to under stand the code. Can you please share matpower code for DC state estimation, please. * *Regards* *Saeed Ahmed* Regards Saeed Ahmed On 24 March 2017 at 14:08, mohamed gabr wrote: >

Re: Re: Question on 'baseKV'

Thank you very much, but the problem has been solved. help caseformat: Generator Data Format 1 bus number (-) (machine identifier, 0-9, A-Z) 2 Pg, real power output (MW) 3 Qg, reactive power output (MVAr) 4 Qmax, maximum reactive power

Re :Re: Question:modelling of FACTS

Regarding this, I can share that FACTS device modelling can be included as equality constraints in file "consfmin" of MATPOWEROn Wed, 26 Nov 2008 10:33:59 -0800 "MATPOWER discussion forum" wrotehii need too,please send me if u get eny information.thanksOn Tue, Nov 25, 2008 at 1:41 PM, mehdi bahr

Re: Re: Question on baseMVA

* Zgiven(pu) ) The results of runpf do still differ from the original results Von:jrcama...@ufu.br An: "MATPOWER discussion forum" Datum: 29.04.2011 14:40 Betreff:Re: Question on baseMVA Gesendet von: bounce-23434426-19895...@list.cornell.edu > Hi, I have

Re: Re: Transmission line capacity

Thank you. Maybe this is naive question, is the rating here the same as capacity? Thanks, Lin linhomeperson From: Ray Zimmerman Date: 2013-07-17 01:37 To: MATPOWER discussion forum Subject: Re: Transmission line capacity RATE_A in the branch matrix (see Table B-3 in User's M

Re:

How can I get MATPOWER software On Feb 29, 2020 01:52, "Ray Daniel Zimmerman" wrote: I do not have the code to do it, and as I’ve said before , I’m not sure there is “one correct way” to do it for an AC OPF result. Reference [1]

Re:

Use the download link on the MATPOWER web-site: https://matpower.org/ Ray On Feb 28, 2020, at 9:04 PM, Nazziwa Evalyne mailto:nazziwaeval...@gmail.com>> wrote: How can I get MATPOWER software On Feb 29, 2020 01:52, "Ray Daniel Zimmerman" mailto:r...@cornell.edu>> wrote: I do not have the

Re:

Thanks very much On Sat, Feb 29, 2020, 06:34 Ray Daniel Zimmerman wrote: > Use the download link on the MATPOWER web-site: https://matpower.org/ > >Ray > > > On Feb 28, 2020, at 9:04 PM, Nazziwa Evalyne > wrote: > > How can I get MATPOWER software > > On Feb 29, 2020 01:52, "Ray Daniel Zimm

Re:

Hi This is Case118. And I am trying to solve as per auction. mkt.OPF = 'AC'; mkt.auction_type = 1; mpc = loadcase('case118_3'); offers.P.qty = [0 0 0; 0 0 0; 0 0 0; 0 0 0; 100 150 170; 20 25 30; 0 0 0

Re:

hello all, My tutor told me to convert Case118 according to Auction case. I modify case118 by adding dispatchable load and did runmarket() and the programme is converging. But when I writing my program in the matrix I am not getting the converging form. Find the attachment. 2017-02-09 13:26 GMT

Re:

I’m not sure, but the offer/bid data does not seem consistent with case118, which does not have any dispatchable loads and therefore should not have any bids, only offers. Ray > On Feb 9, 2017, at 8:26 AM, Ammar Raza wrote: > > > Hi > > This is Case118. And I am trying to solve as per au

Re:

What should I do? I have a question. On Mon, Mar 26, 2018 at 5:28 PM, naime ahmadi wrote: > Dear all, > I have a two questions. > I want to change Jacobin Matrix for IEEE 14 bus system and after that get > the state estimation. > I do not know where can I put this new Jacobin in the codes. > > S

Re:

If you use the Newton power flow, please find the “newtonpf.m” file, then you can find the Jacobin matrix in it. To change to Z matrix, please find the “MakeYbus.m” and look in detail of it. Or maybe the Z = Ybus^-1. Best Regards, Zhida 在 2018年3月26日，09:39，naime ahmadi mailto:naimeahm...@gmai

Re:

The code for our SuperOPF related research is not yet ready for public release. -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On May 17, 2013, at 3:51 AM, 舒 wrote: > > I heard you have recently for superOPF ,is that

RE:

Dear Dr Zimmerman, Where please can I access a reliable version of the matpower source code ? I would like to see the OPF equations and implement them in a personal version of nonlinear ACOPF. Thank you Syros Gian Subject: Re: From: r...@cornell.edu Date: Fri, 17 May 2013 09:37:12 -0400 To

Re:

MATPOWER is only distributed in source code form, so if you've downloaded MATPOWER, you already have the source code. I'm not sure what you mean by a "reliable version" … -- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645

RE: RE: circulating current (MVAR loss)

. From: Russ Patterson [mailto:r...@relayman.org] Sent: Thursday, January 7, 2021 8:12 PM To: 'MATPOWER-L' Subject: RE: circulating current (MVAR loss) Hi Ray, I believe you are correct - if you ensure that the off-nominal transformer is added to the model with orientation in the bran

Re: Re: Power flow divergence problem

Thank you for your advise. There might be one or more isolated areas, because there are several splitted buses on the system. Hwachang Song --- Original Message --- >From: "Ray Zimmerman" To : "MATPOWER discussion forum" Date: 2013/01/08 화요일 오전 1:41:59 S

Re: Re: Power flow divergence problem

d properly. Thank you. Hwachang --- Original Message --- >From : "Ray Zimmerman" To : "MATPOWER discussion forum" Date : 2013/01/08 화요일 오전 1:41:59 Subject : Re: Power flow divergence problem It really depends on why the matrix is singula

Re: case13659pegase

The particular reason a specific numerical algorithm fails for a given problem is not always easy to determine. On this problem, you can try turning on the mips.step_control option. That seems to work for me. Ray > On Jul 18, 2019, at 10:59 AM, Aamir Nawaz wrote: > > Dear Researchers, >

Re: case13659pegase

Sorry, I should have mentioned that the MIPS solver in MATPOWER is essentially a Matlab language implementation of the MEX based PDIPM. Ray > On Jul 26, 2019, at 4:14 PM, Ray Zimmerman wrote: > > The particular reason a specific numerical algorithm fails for a given > problem is not alwa

Re: case13659pegase

Dear Dr. Ray Zimmerman, Thanks for your kind response. It also worked for me too. *Regards,Aamir Nawaz* On Sat, Jul 27, 2019 at 5:17 AM Ray Zimmerman wrote: > Sorry, I should have mentioned that the MIPS solver in MATPOWER is > essentially a Matlab language implementation of the MEX based PDIP

Re: apologies

No Problem Professor you are our good example in the feild of optimization I hope received some explanation and examples of stochastic optimization and constrained unit commitment which I m veru interested to accomplish some works and if there is an idea in this context I will be very happy to

Re: add_quad_cost

The easiest way to add the cost you want is by using direct specification of legacy costs as described in Sections 6.3.3 and 7.1.3 in the User’s Manual. Something like … define_constants; mpc = loadcase('case33bw'); % -Va-- ---

Re: add_quad_cost

MorningThanks for your reply. I was actually trying to improve voltage profile by minimizing the difference of each node voltage from the reference voltage (sum(1-V(i)). I did not work at all. No change was observed relative to the node voltage.nice day to every one Le mercredi 18 novembre

Re: add_quad_cost

Exactly. As I said, it’s because you have no degrees of freedom in the problem. That is, in a radial system like this with a single generator, the feasible region of the OPF consists of a single point, the power flow solution. If you want to improve voltage, you have to give it something it can

Re: pf.nr.max_it

Russ Patterson wrote: Hi friends,   Per Table 4-2 in the manual, I want to increase the number of iterations to solve my power flow.  So, I added a line to my .m file as you see below.  But,

RE: pf.nr.max_it

Hi Carlos, Thank you, outstanding. Yes, I will do as you suggest. Best regards, russ Carlos wrote: The options structure must be passed along as an optional argument to runpf(). Something along these lines: method 1: tell mpoption to modify a specific field in the returned structu

Re: pf.nr.max_it

I’ll also just mention that if the Newton power flow didn’t converge within 10 iterations, it is pretty unlikely that giving it more will help. It’s probably a divergent case. Ray On Dec 10, 2020, at 3:34 PM, Russ Patterson mailto:r...@relayman.org>> wrote: Hi Carlos, Thank you, outstan

Re: mpc.branch

Hello, Please I dont really understand what the message is driving at. I only posted an island network with VISMA system in the forum for power flow analysis but please i dont understand how your mail is connected to it, please can you expatiate further? Thank you and kind regards Sanusi

Re: mpc.branch

Hi Scott, The explanation is in the fine print … namely the 3rd footnote under Table B-3. Those extra columns are included in the output but are typically not included (or else they are ignored) on input. Ray On Aug 22, 2022, at 3:16 PM, Scott seedell mailto:scottseed...@hotmail.com>>

Re: mpc.branch

rom: bounce-126765030-91948...@list.cornell.edu on behalf of Ray Daniel Zimmerman Sent: Tuesday, August 23, 2022 4:00:10 PM To: MATPOWER-L Subject: Re: mpc.branch Hi Scott, The explanation is in the fine print … namely the 3rd footnote under Table B-3. Those extra columns are included in the out

Re: mpc.branch

.@cornell.edu>> Sent: Tuesday, August 23, 2022 4:00:10 PM To: MATPOWER-L mailto:matpowe...@list.cornell.edu>> Subject: Re: mpc.branch Hi Scott, The explanation is in the fine print … namely the 3rd footnote under Table B-3. Those extra columns are included in the output but are typicall

Re: Output

mpopt = mpoption('out.all', 0); Ray On Oct 5, 2022, at 2:45 PM, Scott seedell mailto:scottseed...@hotmail.com>> wrote: Hi, What is the best method to suppress the printing on the screen after each power flow? I’m running a monte carlo simulation with a large number of cycles and would be

Re: Ybus

I have forgotten to attach the picture. On Mon, Oct 10, 2022 at 3:40 PM naime ahmadi wrote: > Hello, > I have a question regarding equations (2) and (3) in the attached picture. > I am not sure equation (3) is correct. But *sj* is the power injection > and *f{i,j}* is the power flow. > I am a l

Re: Ybus

I am really honored to accept your email. However, I am sorry that I can’t help you. Good luck to you!发自我的 iPhone在 2022年10月10日，14:42，naime ahmadi 写道：I have forgotten to attach the picture.On Mon, Oct 10, 2022 at 3:40 PM naime ahmadi wrote:Hello,I have a question regarding

Re: Ybus

In matrix form, you can do the corresponding calculations as follows (e.g. for case9): define_constants mpc = loadcase('case9'); [Ybus, Yf, Yt] = makeYbus(mpc); V = mpc.bus(:, VM) .* exp(1j * mpc.bus(:, VA)*pi/180); Sbus = V .* conj(Ybus * V); Sf = V .* conj(Yf * V); St = V .* conj(Yt * V); Here

Re: Ybus

Slight correction: Sf = V( mpc.branch(:, F_BUS) ) .* conj(Yf * V); St = V( mpc.branch(:, T_BUS) ) .* conj(Yf * V); carlos. Ray Daniel Zimmerman wrote: In matrix form, you can do the corresponding calculations as

Re: Ybus

Thank you for your time On Tue, Oct 11, 2022 at 7:14 AM Carlos E Murillo-Sanchez < ce.murillosanc...@gmail.com> wrote: > Slight correction: > > Sf = V( mpc.branch(:, F_BUS) ) .* conj(Yf * V); > St = V( mpc.branch(:, T_BUS) ) .* conj(Yf * V); > > carlos. > > Ray Daniel Zimmerman wrote: > > In matr

Re: Ybus

Hello, I want to solve the optimization function for calculating voltage. As a constraint, I need to calculate each bus's minimum and maximum values of real and reactive power injection. here is the calculation: Pfe=branch(:,PF)/baseMVA; Qfe=branch(:,QF)/baseMVA; Pte=branch(:,PT)/baseMVA; Qte=branc

Re: Ybus

Good catch! On Oct 10, 2022, at 5:13 PM, Carlos E Murillo-Sanchez mailto:ce.murillosanc...@gmail.com>> wrote: Slight correction: Sf = V( mpc.branch(:, F_BUS) ) .* conj(Yf * V); St = V( mpc.branch(:, T_BUS) ) .* conj(Yf * V); carlos. Ray Daniel Zimmerman wrote: In matrix form, you can do the c

Re: Ybus

I’m afraid I don’t understand what you are trying to calculate. Ray On Oct 11, 2022, at 11:22 AM, naime ahmadi mailto:naimeahm...@gmail.com>> wrote: Hello, I want to solve the optimization function for calculating voltage. As a constraint, I need to calculate each bus's minimum and maximum

Re: Ybus

I need to calculate the minimum and maximum values of real power injection at each bus. Sbus = V .* conj(Ybus * V); P_bus = real(Sbus); Q_bus = imag(Sbus); for i=1:length(P_bus) if P_bus(i)>0 P_inj_max(i,:) = P_bus(i,:)+0.05*P_bus(i,:); P_inj_min(i,:) = P_bus(i,:)-0.05*P_bus(

Re: Ybus

I’m afraid I still don’t understand what you mean by “minimum and maximum values of real power injection at each bus” … min and max as constrained by what? What are you allowing to vary and what are you keeping fixed? In the code you provide, it seems like you are taking a particular voltage so

Re: penalty

You’ll have to describe what you’re doing in a bit more detail for us to be able to give any useful input. Presumably, you are doing an OPF with some sort of modified cost function? What is the objective function? Ray On Oct 17, 2014, at 12:02 AM, nivedita arunachalam wrote: > ​Dear all,

Re: penalty

I do powerloss optimisation which adds up the violation values. I have the voltages of the gen bus as my control variable. My outputs without penalty gives lesser values than with penalties. And i hav another ques that is while doing reactive power optimisation should i enforce q limits. I refered

Re: penalty

If you are saying that adding the penalty function (to violations of certain constraints, I assume? which ones?) increases your reactive power output, I’m afraid I don’t have a good explanation for that. It’s also not clear which “outputs” are giving you “lesser values” without penalties than w

Re: Doubt

equality constraint you specify must be re-written in terms of Pg2 and Pg4, not the delta variables. See chapter 7 (probably section 7.1) of the manual for details on how to add this. Ray > On Jan 29, 2015, at 1:34 AM, lavanya arubolu wrote: > > Dear all, > My se

Re: BR_B

b_c is the total line charging susceptance (not related to the series impedance). I’m afraid I don’t have any advice on how to obtain these parameters for your system. Ray > On Feb 17, 2015, at 1:23 PM, Xiaolin Ayon Flores wrote: > > Hello, > > Please your help, > > In the manual, bc i

Re: BR_B

Hi, If you want to use the short line approximation, just set 0 to the susceptance and this element will disappear from the equivalent circuit. If your line is long and you don't want to use the short line approximation, then you will have to make a qualified guess with the tables of susceptances

Re: BR_B

If you choose Bc=0 do not take inverse of Y... Regards, RMS Sent from my Remote > On Feb 17, 2015, at 17:26, Juan de Santiago wrote: > > Hi, > > If you want to use the short line approximation, just set 0 to the > susceptance and this element will disappear from the equivalent circuit. > > I

Re: BR_B

Then, I will set BR-B to zero. It is Ok? Because I have a LV grid And the susceptance can be neglected. Regards Ivonne > El 17/2/2015, a las 21:37, Ray Zimmerman escribió: > > b_c is the total line charging susceptance (not related to the series > impedance). I’m afraid I don’t have any a

Re: Storage

It’s always good to search the list archives before posting. You may find other helpful comments there, but here’s a starting point … http://www.mail-archive.com/matpower-l%40cornell.edu/msg03710.html --Ray > On Mar 10, 2015, at 4:16 AM, idriss kyoni > wrote: > > Hello, is it possible to mo

Re: Reconfiguration

I guess the question is, what do you mean by “reconfiguration”. I’m used to thinking of it with regard to network switching in largely radial distribution networks. If that is what you mean, then it simply involves changing the BR_STATUS column of the branches of interest in the branch matrix in

RE: URGENT

Its not clear what you mean by "different" outcomes. Is the difference small, large, converged/diverged, related to real/reactive power, bus voltage magnitudes/angles. I am not familar with NEPLAN. But, here are some things you should check: i) Are you running the same application (AC Power

Re: URGENT

MATPOWER mailing list. From: ?π??? ??π? mailto:arsenop...@gmail.com>> Date: Monday, April 6, 2015 at 11:44 AM To: Shri mailto:abhy...@mcs.anl.gov>> Subject: Re: URGENT Hello Shri, Sorry for late response but i am busy working on a project. Firts of all thank's for

Re: REQUEST

Please take a look at the continuation power flow chapter in the MAtPOWER manual. Shri On Aug 31, 2015, at 11:05 AM, "Owusuboateng, Prince Charles" mailto:powusuboateng8...@mytu.tuskegee.edu>> wrote: Hi All, I have a divided the IEE 39bus system in 4 areas. I will like to load each of the 4

RE: REQUEST

Hi... I would like to proceed to the transformation of an electric network ( e.g. Network39bus​) into a simple (direct or undirect) network to determine its reliability. Does anyone know how to do, or is there any rules to follow. Thank you very much. Med-Larbi 

Re: REQUEST

Can you please let us know what you've tried till now, along with any errors, and what specific part(s) of the CPF chapter you did not understand. There is also an example run at the end of that chapter that you may tweak for your application. Shri On Aug 31, 2015, at 3:38 PM, "Owusuboateng, P

Re: REQUEST

What do you mean by 'simple (direct or undirect) network'? Shri On Aug 31, 2015, at 9:06 PM, "Mohamed-Larbi Rebaiaia" mailto:mohamed-larbi.rebaiai...@ulaval.ca>> wrote: Hi... I would like to proceed to the transformation of an electric network ( e.g. Network39bus​) into a simple (direct or

RE: REQUEST

corresponds to the performance in term of reliability, Here a simple network: Sincerely ​ Med-Larbi. De : bounce-119603272-72988...@list.cornell.edu de la part de Abhyankar, Shrirang G. Envoyé : 2 septembre 2015 08:24 À : MATPOWER discussion forum Objet : Re: REQUEST   What

Re: REQUEST

Rebaiaia mailto:mohamed-larbi.rebaiai...@ulaval.ca>> Reply-To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Date: Wednesday, September 2, 2015 at 11:52 AM To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Subject: RE: REQUEST A network is a grap

RE: REQUEST

​Thank you very much Shri.. I will try what you propose to me and come back to you in few days. Sincerely. Med-Larbi. De : bounce-119610279-72988...@list.cornell.edu de la part de Abhyankar, Shrirang G. Envoyé : 3 septembre 2015 14:07 À : MATPOWER discussion forum Objet : Re

Re: August

Hi MATPOWER users, I’m back. Issues related to migration of my e-mail from one system to another kept me away even longer than I expected. Thanks to those who have lent a hand to other MATPOWER users in my absence. It will take me a few days at best to get caught up. Ray > On Jul 31, 201

Re: pd

> On Feb 19, 2016, at 8:36 AM, VANJARAPU VENKATARAONAIDU > wrote: > > what is the nominal_pd and nominal_qd Ah … 45.8 and 19.3. Just kidding. But seriously, please show enough respect to give some context for your question so there is at least a chance somebody will understand what you are a

Re: pd

thanks for your suggestion and reply sir On Sat, Feb 20, 2016 at 2:02 AM, Ray Zimmerman wrote: > On Feb 19, 2016, at 8:36 AM, VANJARAPU VENKATARAONAIDU < > venkataraovanjar...@gmail.com> wrote: > > what is the nominal_pd and nominal_qd > > > Ah … 45.8 and 19.3. > > Just kidding. But seriously, p

Re: scaleload

It looks to me like when you go to store the return value of runopf() in results it is finding that the existing results struct has different fields than the one being returned by runopf(). Try clearing the results variable first and if that doesn’t work, you can probably work around it by stori

Re: scaleload

the error is because of i gave like mpc(t)=mpc,i need to write as mpc0(t)=mpc just for example.i have cleared my doubt and thanx for replying On Tue, Feb 23, 2016 at 8:58 PM, Ray Zimmerman wrote: > It looks to me like when you go to store the return value of runopf() in > results it is finding t

RE: scaleload

...@list.cornell.edu] on behalf of VANJARAPU VENKATARAONAIDU [venkataraovanjar...@gmail.com] Sent: 23 February 2016 4:16 PM To: MATPOWER discussion forum Subject: Re: scaleload the error is because of i gave like mpc(t)=mpc,i need to write as mpc0(t)=mpc just for example.i have cleared my doubt and thanx for

RE: scaleload

...@postgrad.manchester.ac.uk] Sent: 23 February 2016 4:28 PM To: MATPOWER discussion forum Subject: RE: scaleload Pls unsubscribe me from the list. Thanks for the services. Muhammad Buhari PhD student Electrical Energy and Power Systems Research group, University of Manchester, UK

Re: scaleload

list.cornell.edu>> Date: Tuesday, February 23, 2016 at 9:28 AM To: MATPOWER discussion forum mailto:matpowe...@list.cornell.edu>> Subject: Re: scaleload It looks to me like when you go to store the return value of runopf() in results it is finding that the existing results struct has di

Re: price

MATPOWER simply solves an optimal power flow … higher level questions related to market design will have to be answer by you. You may be able to use the dispatchable load capability described in Section 6.4.2 of the User’s Manual

Re: LMP

It is working as expected. The load will be curtailed when the price is higher than the value you assign to the load. So if you assign a value of $38, and the price is $40, it will be curtailed. If you assign the value to $45, the load will not be curtailed at a price of $40. Essentially, you ar

Re: LMP

sir thanks for reply.But i think this concept in a different view. i.e i take the marginal benefit cost as the one which we get in the power flow.The price which we set is the high price we are setting. we are representing them as negative costs.so i take it as for example

Re: LMP

I’m afraid I don’t understand your description of your view. I am only aware of two quantities involved … (1) the marginal benefit or value of the load which directly determines the “cost” of the negative generator used to model it, and (2) the nodal price computed by the OPF. (1) is an input, (

Re: LMP

sir actually, i run an ieee14 bus system and i get the nodal prices at the respective buses.i take the nodal price at 3rd bus as the marginal benefit,to reduce the load in that system,i write the code as mpc0=loadcase('case14o'); define_constants; >> mpc=load2disp(mpc0,'mo',3,30); and i take thi

Re: LMP

You are making it too complicated (and I confess I still don’t follow what you are doing). This line of code … mpc=load2disp(mpc0,'mo',3,30); … simply means that you want the load at bus 3 to be curtailed if the nodal price goes above $30. If the original price (with no curtailment) was $40, y

Re: LMP

sir by calculating like that,i find the elasticity value based on the prices and demand at one bus and from that elasticity value i calculate theoritically the load at other buses.and i get the value equal to the load which i get when i run the power flow.is it absolutely wrong or there may

Re: LMP

I’m happy to explain what MATPOWER does with the inputs you give it, but I’m afraid I can’t answer whether or not your approach solves the problem you want to solve. Best regards, Ray > On Mar 15, 2016, at 1:53 PM, Mounika Vanjarapu > wrote: > > sir >by calculating like that,i f

Re: converge

Please see FAQ #5 . Ray > On Mar 23, 2016, at 4:08 AM, shruti seemala wrote: > > sir > I got a problem regarding converge of power flow.Actually i have data of per > unit values where given the generation and cost data in per unit valu

Re: converge

sir, all i have checked.the bus data,branch data,gencost data all are in per unit values.for overloading condition all are in no limit condition.once please ckeck the attached one if there is any error please suggest me,what to do On Wed, Mar 23, 2016 at 7:27 PM, Ray Zimmerman wrote: > Please se

Re: converge

The load and generation should be in MW, not in p.u. See help caseformat for details. Ray > On Mar 24, 2016, at 1:46 PM, shruti seemala wrote: > > sir, > all i have checked.the bus data,branch data,gencost data all are in per unit > values.for overloading condition all are in no limit co

Re: Question

I’m not sure what you mean by “completely non-convex”, but yes, you can use LAM_P as the LMP. It is simply the sensitivity of overall objective function to a change in the load at the bus. Of course this is at the OPF solution, which in a non-convex problem is not guaranteed to be a global solut

Re: converge

Sir I did what you suggest.and it converged.bu my problem is the data I am having is gencost in $/perunit.h .but in this in mwh.how to change. On Friday, March 25, 2016, Ray Zimmerman wrote: > The load and generation should be in MW, not in p.u. See help caseformat for details. >Ray > > > On

Re: converge

Same as you would when converting any other function from one set of units to another (btw, this is a simple algebra question, not a MATPOWER question). Ray > On Mar 30, 2016, at 6:46 AM, shruti seemala wrote: > > Sir I did what you suggest.and it converged.bu my problem is the data I am

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,

Re: Question

If you look at the formulation in equations (7.2)–(7.5) it should be clear that runopf_w_res() only deals with upward spinning reserves. In order to deal with downward spinning reserves–or any other class of reserves

Re: penalty

Probably. > On May 12, 2016, at 12:16 PM, Mounika Vanjarapu > wrote: > > sir >can we pose penalties for the customers who don't curtail the load using > matpower.

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