Re: Power Flow Calculation Error

tp://radial.pf/> separately? On Wed, Nov 22, 2023 at 10:16 PM Ray Daniel Zimmerman mailto:r...@cornell.edu>> wrote: What you show is a warning (not an error) coming from the Power Summation method. As long is the method converges with success = 1, the result should be valid. Also, if

Re: Power Flow Calculation Error

you show is a warning (not an error) coming from the Power Summation > method. As long is the method converges with success = 1, the result should > be valid. > > Also, if the Newton power flow converges, its result should also be fine. > Sometimes the Newton power flow has more di

Re: Power Flow Calculation Error

What you show is a warning (not an error) coming from the Power Summation method. As long is the method converges with success = 1, the result should be valid. Also, if the Newton power flow converges, its result should also be fine. Sometimes the Newton power flow has more difficulty on

Re: Power Flow Calculation Error

as a single bus then it doesn't give an error. On Sat, Nov 18, 2023 at 6:29 PM Muhammad Junaid mailto:gaylethunder...@gmail.com>> wrote: Hi Sir, I hope you are doing well. Sir, when we use this data for the generator matrix, it gets solved using Newton's Power Flow but gives this

Re: Power Flow Calculation Error

t give an error. On Sat, Nov 18, 2023 at 6:29 PM Muhammad Junaid wrote: > Hi Sir, > > I hope you are doing well. Sir, when we use this data for the generator > matrix, it gets solved using Newton's Power Flow but gives this error: > >> MATPOWER Version 7.1, 08-Oct-2020 -- A

Power Flow Calculation Error

Hi Sir, I hope you are doing well. Sir, when we use this data for the generator matrix, it gets solved using Newton's Power Flow but gives this error: > MATPOWER Version 7.1, 08-Oct-2020 -- AC Power Flow (Power Summation) > Warning: Matrix is singular to working precision. > >

Re: Regarding storing of the result from optimal power flow

See Section 6.6 in the MATPOWER User’s Manual, especially Table 6-1. There are a few things, like losses, that are displayed in the console output, that are not included in the results struct. These can be computed using get_losses(). Ray

Regarding storing of the result from optimal power flow

Respected sir, As I am running any case file in matpower let's say case 33 for finding the opf it is showing the result as bus data and branch data. But how store those data in matlab workspace, so that I can write a program using those data. Please help me out in this regard.

Re: Power flow and generation power limit

I mean Pmin and Pmax is not accounted in load flow analysis. On Sat, 11 Feb 2023, 9:10 am Dr. D. Karthikaikannan ., < karthikaikan...@eee.sastra.edu> wrote: > Load flow analysis do not take real power constraints. Reactive power > constraints you can include for generations. > > On Sat, 11 Feb 20

Re: Power flow and generation power limit

Load flow analysis do not take real power constraints. Reactive power constraints you can include for generations. On Sat, 11 Feb 2023, 4:29 am Muhammad Nadeem, wrote: > Hello everyone, > > I am a bit new to MATPOWER, I am bit confused about the working of > "runpf()" command. Does it checks the

Power flow and generation power limit

Hello everyone, I am a bit new to MATPOWER, I am bit confused about the working of "runpf()" command. Does it checks the active and reactive power generation limit constraints of synchronous generator? Because as a test case i decrease the Pmax on generations but still runpf() converges although t

Re: Query in power flow analysis of radial distribution system with two voltage levels

Ok. Will check that. On Tue, 22 Nov, 2022, 1:08 am Ray Daniel Zimmerman, wrote: > If you convert everything into per-unit correctly, using a different > voltage base for the different buses, it shouldn’t be a problem. I suggest > finding a good textbook on converting parameters to per-unit to ma

Re: Query in power flow analysis of radial distribution system with two voltage levels

If you convert everything into per-unit correctly, using a different voltage base for the different buses, it shouldn’t be a problem. I suggest finding a good textbook on converting parameters to per-unit to make sure you get it right, especially for the transformer. Ray > On Nov 7, 2022,

Query in power flow analysis of radial distribution system with two voltage levels

I want to use the MATPOWER for load flow analysis of the practical radial distribution system. In the system two voltage levels are there. First is 11 kV bus (Bus 1) which is slack bus. All other buses are of 440V bus. There is a transformer of 11kV/440V between bus 1 and 2. >From bus 2 onwards ar

Re: Question regarding Matpower's continuation power flow

x27;s continuation power flow Check twice before you click! This email originated from outside PNNL. Dear friends I have been running the continuation power flow for several networks. In the case of "case2869pegase", I counted 92 rollbacks. However, "events" is a struct with dimension

Question regarding Matpower's continuation power flow

Dear friends I have been running the continuation power flow for several networks. In the case of "case2869pegase", I counted 92 rollbacks. However, "events" is a struct with dimension [1x98]. I was expecting that the dimension of "events" was [1x92], that

Re:Re: Power flow calculation when changing the network topology

Dear Ahmad, Thanks for your suggestions! I've tried several power flow algorithms ('NR', 'GS', 'YSUM', etc.) referring to the manual, but the calculation all fails. Considering your last advice, today I'm searching for explanations of po

Re: Power flow calculation when changing the network topology

Dear Yan, Yes to your first question. The STATUS determine the connectivity or otherwise of a branch. On the second question, there are algorithm for running Distribution power flow different from runpf. Kindly refer to the manual for about three different distribution power flow algorithm and

Power flow calculation when changing the network topology

Dears, I‘m trying to calculate power flow in distribution systems considering network reconfiguration. From the data format description, I noticed that the 11th column of mpc.branch named BR_STATUS represents "initial branch status". But I'm not sure whether that attribute m

Re: Running Power flow with Voltage dependent load model

With MATPOWER 7 and earlier, unfortunately, there isn’t a really clean way to accomplish this. The way that comes to mind is to represent each load with a “fake” generator, and then add some user-defined nonlinear constraints (as described in Section 7.1.2 in the User’s Manual) that define the o

Fwd: Running Power flow with Voltage dependent load model

-- Forwarded message - From: Arpit Srivastava M.Tech., Electrical Engineering, IIT(BHU) < arpitsrivastava.ee...@itbhu.ac.in> Date: Mon, Jan 10, 2022 at 3:52 PM Subject: Running Power flow with Voltage dependent load model To: Hello Matpower Users, Please let me know How

Running Power flow with Voltage dependent load model

Hello Matpower Users, Please let me know How to run load flow with voltage dependent load models. In my case each bus load have to be modeled as: Pload= Pl*(V)^pr Qload= Ql*(V)^qr where Pload, Qload = voItage dependent real and reactive power load. Pl, Ql= real and reactive load at nominal voItage.

Re: current of branch for DC power flow

MATPOWER does not include a function for computing the current from the branch power injections, but you can always get the complex current from the complex power and voltage. I = (S / V)* With the assumptions of the DC power flow (|V| ≈ 1, angle ≈ 0, Q negligible), the current is

Re: current of branch for DC power flow

Yes, the power injection (Sij)  in the sending bus - the power injection (Sji)  in the reseiving bus Le lundi 6 décembre 2021, 12:33:40 UTC+1, zahra nekudari a écrit : Hi dears,I want to know, there is any function for calculate current of any branch? I use DC power flow (rundcpf).

current of branch for DC power flow

Hi dears, I want to know, there is any function for calculate current of any branch? I use DC power flow (rundcpf).

Re: DC power flow considering resistive losses

As you mention, MATPOWER does not currently include consideration of losses in the DC power flow or DC OPF. You could estimate the losses manually after the fact based on the resistances and the lines flows that result from the lossless DC power flow. It would even be possible to run something

DC power flow considering resistive losses

Hi all, Is there any way to solve DC power flow problem considering line resistances? The rundcpf and rundcopf commands solve the problem by ignoring all losses. Sincerely

回复: How to calculate power flow of ac-dc hybrid distribution network?

Ok, Thank you very much, Ray. 从 Windows 版邮件发送 发件人: Ray Daniel Zimmerman 发送时间: 2021年8月28日 0:57 收件人: MATPOWER-L 主题: Re: How to calculate power flow of ac-dc hybrid distribution network? You may want to check out the MATPOWER-FUBM fork of MATPOWER by Abraham Alvarez-Bustos. It has some AC-DC

Re: How to calculate power flow of ac-dc hybrid distribution network?

ilto:hhuw...@163.com> wrote: Hi, I am wondering if Matpower can handle the power flow (or optimal power flow) of ac-dc hybrid distribution network? For example, I want to model a soft open point. Is there any way to model this? Thank you.

How to calculate power flow of ac-dc hybrid distribution network?

Hi, I am wondering if Matpower can handle the power flow (or optimal power flow) of ac-dc hybrid distribution network? For example, I want to model a soft open point. Is there any way to model this? Thank you.

Re: Ybus Construction: Parallel Branch Modelling for Power Flow

Thanks very much! From: bounce-125782784-86837...@list.cornell.edu on behalf of Ray Daniel Zimmerman Sent: Tuesday, July 20, 2021 6:39 AM To: MATPOWER-L Subject: Re: Ybus Construction: Parallel Branch Modelling for Power Flow EXTERNAL EMAIL: It is perfectly

Re: Ybus Construction: Parallel Branch Modelling for Power Flow

It is perfectly fine to replace parallel branches with a single equivalent branch. If done properly, it will result in an identical power flow solution. Ray On Jul 16, 2021, at 1:22 PM, Liang Chen mailto:liangjie.c...@mail.utoronto.ca>> wrote: Dear all, I have a question regardi

Ybus Construction: Parallel Branch Modelling for Power Flow

(j,i), i.e., both from i to j, and from j to i. For example, in case13659pegase.m, the branches (11001, 9689) and (9689, 11001) both exist and have different impedance values. My question is that, if we model the system as a simple directed graph for the power flow analysis (so the branch f

Re: voltage magnitude limits control in power flow

If you only need to control the voltage at generator buses, then you can do it simply via the generator voltage setpoint in mpc.gen(:, VG). Otherwise, you can always use an appropriately constrained OPF to solve the power flow problem. Ray On Jun 29, 2021, at 10:07 PM, J C mailto:inglop

Re: my power flow data is not converge by NR method

Have you tried the things mentioned in FAQ #5<https://matpower.org/doc/faq/#pfconvergence>? Ray On Jun 29, 2021, at 8:43 PM, Ari N mailto:ari.nrar...@gmail.com>> wrote: hello everyone, I need help. Can you check my power flow data?. The data on the attachment file. many thanks

voltage magnitude limits control in power flow

Dear All, Do you know if there exists the possibility of solving the power flow (NR) in matpower considering the voltage magnitude limits control? Regards

my power flow data is not converge by NR method

hello everyone, I need help. Can you check my power flow data?. The data on the attachment file. many thanks function [baseMVA, bus, gen, branch, area, gencost] = case161_01 % 08/25/93 UW ARCHIVE 100.0 1961 W IEEE 57 Bus Test Case % The test system data was originally in IEEE Common

Re: Continuous power flow question

Hi Simone, See the FAQ on power flow divergence<https://matpower.org/doc/faq/#pfconvergence>. It lists some useful tips to debug power flow divergence when using MATPOWER and how to run a continuation power flow to check if a power flow solution exists (point v). Thanks, Shri Fro

Continuous power flow question

Hi, I would like to ask where I can find specific indications on the use of "continuous power flow" in Matpower? Maybe a video, an example Specifically I have a case (an electrical grid) for which Newton-Rapshon does not converge even if a solution exists and I thought of the &

Re:A question in calculating power flow

The voltage magnitude of the slack bus and PV buses is controlled by the VG column in gen field, namely, column 6 of mpc.gen. Changing column VM in mpc.bus does not change them. Best Regards, Yang Yang   -- Original -- From:

Re: A question in calculating power flow

ing runpf(mpc), the result shows that it does not work, the > voltage magnitude of node 1 still converge to 1. Since the voltage > magnitude of a reference node is supposed to be static during power flow > calculation, I wanna ask you how could I revise the voltage magnitude of > a refere

A question in calculating power flow

c.bus(1,VM)=1.0025. After running runpf(mpc), the result shows that it does not work, the voltage magnitude of node 1 still converge to 1. Since the voltage magnitude of a reference node is supposed to be static during power flow calculation,I wanna ask you how could I revise the voltage magn

Power flow starting points

Hello I would like to ask if Matpower allows for choosing a starting point for solving the power flow problem other than the flat start? If possible, how can it be done? Thanks -- *Abdelrahman AldikPhD Candidate Department of Electrical and Computer Engineering and Centre of Urban Energy

Re: Implementation of power flow using fmincon

() to use it to solve the power flow problem. So if you’re using FMINCON as the OPF solver it should be something similar to your second approach, though implemented differently (probably more variables and constraints). See the attached file called runpfbyopf.m. Ray On Mar 6, 2021, at 10:45

Implementation of power flow using fmincon

Dear Ray,   Recently I am doing research on implementing of power flow (note: NOT OPTIMAL POWER FLOW) using matlab function fmincon(). I have two kinds of implementation:    One is to take the normF in newtonpf() as the objective for fmincon(), since the process of newtonpf() is just the

Re: Modelling and Power Flow Validation

Hi Tobias, For your first question, please see the relevant derivation in Section 3.7 of the User’s Manual<https://matpower.org/docs/MATPOWER-manual-7.1.pdf>. This describes the formulation used by MATPOWER. I suppose it is possible that some DC power flow implementations also inclu

Modelling and Power Flow Validation

ceive very accurate results for the DC power flow in matpower compared with a commercial powerflow tool. The decisive setting was the neglection of the parameters in the TAP column for the transformers. The only place where the TAP column is considered for the DC power flow is inside the fun

load during CPF (was Re: Optimal power flow with DG connected)

WER, how can I get the Pload during the process? -- 原始邮件 -- 发件人: "MATPOWER discussion forum" mailto:mirishtha...@gmail.com>>; 发送时间: 2020年9月17日(星期四) 晚上9:29 收件人: "MATPOWER discussion forum"mailto:matpowe...@list.cornell.edu>>; 主题:

?????? Optimal power flow with DG connected

Hi,everyone, I want to ask a question, which is that when I run the cpf function in MATPOWER, how can I get the Pload during the process? --  -- ??:

Re: Optimal power flow with DG connected

t;> On Sat, Sep 12, 2020 at 10:40 AM Surbhi Aggarwal < >>> surbhiaggarwa...@gmail.com> wrote: >>> >>>> Hello >>>> Thank you all for your help and I'll definitely look out for the >>>> solutions. >>>> Thank you so much &g

Re: Optimal power flow with DG connected

hank you all for your help and I'll definitely look out for the >>> solutions. >>> Thank you so much >>> Regards >>> Surbhi Aggarwal >>> >>> >>> On Fri, Sep 11, 2020 at 7:16 PM Ray Daniel Zimmerman >>> wrote: >>> >>&

Re: Optimal power flow with DG connected

definitely look out for the solutions. Thank you so much Regards Surbhi Aggarwal On Fri, Sep 11, 2020 at 7:16 PM Ray Daniel Zimmerman mailto:r...@cornell.edu>> wrote: Hi Surbhi, It looks like you were using the default Newton power flow. To increase the number of iterations, you can increas

Re: Optimal power flow with DG connected

< > surbhiaggarwa...@gmail.com> wrote: > >> Hello >> Thank you all for your help and I'll definitely look out for the >> solutions. >> Thank you so much >> Regards >> Surbhi Aggarwal >> >> >> On Fri, Sep 11, 2020 at 7:16 PM Ray

Re: Optimal power flow with DG connected

e: Hello Thank you all for your help and I'll definitely look out for the solutions. Thank you so much Regards Surbhi Aggarwal On Fri, Sep 11, 2020 at 7:16 PM Ray Daniel Zimmerman mailto:r...@cornell.edu>> wrote: Hi Surbhi, It looks like you were using the default Newton power flo

Re: Optimal power flow with DG connected

Thank you all for your help and I'll definitely look out for the solutions. > Thank you so much > Regards > Surbhi Aggarwal > > > On Fri, Sep 11, 2020 at 7:16 PM Ray Daniel Zimmerman > wrote: > >> Hi Surbhi, >> >> It looks like you were using the de

Re: Optimal power flow with DG connected

Hello Thank you all for your help and I'll definitely look out for the solutions. Thank you so much Regards Surbhi Aggarwal On Fri, Sep 11, 2020 at 7:16 PM Ray Daniel Zimmerman wrote: > Hi Surbhi, > > It looks like you were using the default Newton power flow. To increase &

Re: Optimal power flow with DG connected

Hi Surbhi, It looks like you were using the default Newton power flow. To increase the number of iterations, you can increase the pf.nr.max_it option. However, this is rarely necessary. If the Newton method is going to converge, it usually does so in less than the default 10 iterations. If it

Re: Optimal power flow with DG connected

Hi Surbhi, First of all why do you want to increase the number of steps/ iterations in the calculation? Is there any specific need? Actually the number of iterations depends on the power flow optimization tolerance. Maybe you can focus on the mpoption function and read it carefully. You can

Re: Optimal power flow with DG connected

an observe later for analysis) and run the model under (n-1) criteria. > This could be the easiest way to test the model. Thank you. > > Kind regards > Mirish > > > On Wed, Sep 9, 2020 at 9:11 AM Surbhi Aggarwal > wrote: > >> Dear All, >> I am working on opt

Re: optimal power flow with unit commitment using mixed integer programming

Thank you for you interpretation Prof Ray. Actually I have found  a function called sgvm_add_shunts() in matpower -> extras ->syngrid, which looks like  it may do what I want, but I am not sure because there is not too much annotation in its source code and user's manual. --

Re: optimal power flow with unit commitment using mixed integer programming

t and integrated interface like runpf() and runopf() to implement mixed integer programming using other solvers. There is still quite a lot for me to learn. "MATPOWER discussion forum" mailto:r...@cornell.edu>>; 2020年9月9日(星期三) 晚上9:57 "MATPOWER-L"mailto:matpowe...@list.corn

?????? optimal power flow with unit commitment using mixed integer programming

Thank you for your suggestion Prof Ray. Actually I am still learning about the mechanism of uopf() and I dont really understand what binding Pmin limits means. In the attached files, if the cases with and without shunt generators have the same limits of voltage magnitude, the case with shunt gen

?????? optimal power flow with unit commitment using mixed integer programming

Thank you amini, but I dont really learn much about PSO. Do you mean partical swarm optimization? I think I need more time to learn about it. --  -- ??:

Re: Optimal power flow with DG connected

and run the model under (n-1) criteria. This could be the easiest way to test the model. Thank you. Kind regards Mirish On Wed, Sep 9, 2020 at 9:11 AM Surbhi Aggarwal mailto:surbhiaggarwa...@gmail.com>> wrote: Dear All, I am working on optimal power flow to find the contingency (N-1)

Re: optimal power flow with unit commitment using mixed integer programming

"shunt" generators involved as candidates of unit commitment programming only calls for Pmin and Pmax set at a very small number numerically, say, 1e-6 and 1e-5. This minor active power injection will hardly affect the power flow but can get "shunt" generators involved.

Re: optimal power flow with unit commitment using mixed integer programming

tion. Here is my code. > > > -- Original Mail -- > *发件人:* "MATPOWER discussion forum" ; > *发送时间:* 2020年9月9日(星期三) 晚上9:31 > *收件人:* "MATPOWER discussion forum"; > *主题:* Re: optimal power flow with unit commitment using mixed integer > p

?????? optimal power flow with unit commitment using mixed integer programming

That is also a good idea and closer to reality because shunt capacitors and reactors will actually change the Ybus instead of performing as constant reactive power. But I dont know how to include the 6th column of bus as a variable and modify the objective function. Would you please share your c

Re: optimal power flow with unit commitment using mixed integer programming

and 1e-5. This minor active power injection > will hardly affect the power flow but can get "shunt" generators involved. > > > -- 原始邮件 -- > *发件人:* "MATPOWER discussion forum" ; > *发送时间:* 2020年9月9日(星期三) 下午2:22 > *收件人:* "MA

?????? optimal power flow with unit commitment using mixed integer programming

(see source codes of uopf() ). To get "shunt" generators involved as candidates of unit commitment programming only calls for Pmin and Pmax set at a very small number numerically, say, 1e-6 and 1e-5. This minor active power injection will hardly affect the power flow but can get "shu

Re: Optimal power flow with DG connected

line (which you can observe later for analysis) and run the model under (n-1) criteria. This could be the easiest way to test the model. Thank you. Kind regards Mirish On Wed, Sep 9, 2020 at 9:11 AM Surbhi Aggarwal wrote: > Dear All, > I am working on optimal power flow to find the conti

Re: Optimal power flow with DG connected

Hi Surbhi, The system is becoming unobservable, I guess. Regards, Md On Wed, Sep 9, 2020, 2:12 AM Surbhi Aggarwal wrote: > Dear All, > I am working on optimal power flow to find the contingency (N-1) situation > of the system. For some of the line outage, certain output pops out >

Re: Optimal power flow with DG connected

Hi Surabhi, It seems the problem is with your network, not with the power flow algorithm. *Technical interpretation:* For the generation and demand you are targeting; your network is N-1 contingency incompliant. *Mathematical interpretation:* Because of the above problem, power flow Jacobian is

Re: Optimal power flow with DG connected

Try with DC power flow Le mercredi 9 septembre 2020 à 08:11:45 UTC+1, Surbhi Aggarwal a écrit : Dear All,I am working on optimal power flow to find the contingency (N-1) situation of the system. For some of the line outage, certain output pops out MATPOWER Version 7.0, 20-Jun-2019

Optimal power flow with DG connected

Dear All, I am working on optimal power flow to find the contingency (N-1) situation of the system. For some of the line outage, certain output pops out MATPOWER Version 7.0, 20-Jun-2019 -- AC Power Flow (Newton) Warning: Matrix is singular to working precision. > In mplinsolve (line 75)

Re: optimal power flow with unit commitment using mixed integer programming

7;8 GEN_STATUS status, > 0 - in service, <= 0 - out of service' On Wed, Sep 9, 2020 at 6:34 AM yangyang <980182...@qq.com> wrote: > Dear all, > I am working on optimal power flow whose objective is the cost of > generation plus the quadratic deviation of voltage magn

optimal power flow with unit commitment using mixed integer programming

Dear all, I am working on optimal power flow whose objective is the cost of generation plus the quadratic deviation of voltage magnitudes to 1.0.  The special part of the optimization lies in it that it has to include shunt capacitors and reactors in this network apart from conventional

Re: Linear Approximations of Line Flow Constraints for AC Optimal Power Flow

ote: > > Hello everyone, > > I’m trying to solve an AC OPF with linear constraints on the line > flows (power balance constraints). So ,can i have a Linear > Approximations of Line Flow Constraints for AC Optimal Power Flow. > > Best, > >

Linear Approximations of Line Flow Constraints for AC Optimal Power Flow

Hello everyone, I’m trying to solve an AC OPF with linear constraints on the line flows (power balance constraints). So ,can i have a Linear Approximations of Line Flow Constraints for AC Optimal Power Flow. Best,

power flow voltage of bus 69 in 118 bus system

Hi I have a question about state estimation in MATPOWER. In 118 bus system the slack bus is 69. The voltage and angle on bus 69 should be 1 and 0. But when I check Vlf (power flow voltage of bus 69) it is 0.9083 + 0.3784i. So, when I check the error in function runse plot(180/pi*(angle(Vlf)-angle

Re: Power flow while involving radial systems

Hi Aamir Nawaz, Thanks a lot. It is also useful for me. With kind regards, Chixin From: bounce-123871516-44420...@list.cornell.edu on behalf of Aamir Nawaz Sent: 02 September 2019 14:53 To: MATPOWER discussion forum Subject: Re: Power flow while involving

Re: Power flow while involving radial systems

1 > *To:* 'MATPOWER discussion forum' > *Subject:* Power flow while involving radial systems > > Dear Prof.Ray, >The runpf and the runopf did not converge while handling a revised > system (i.e., IEEE 30 and IEEE 33). The revised system is attached. Could > you

Re: Power flow while involving radial systems

POWER discussion forum' Subject: Power flow while involving radial systems Dear Prof.Ray, The runpf and the runopf did not converge while handling a revised system (i.e., IEEE 30 and IEEE 33). The revised system is attached. Could you give me some suggestions when you feel convenie

Power flow while involving radial systems

1 corresponds the new index 31, and so on). The resistance and reactance between bus 1 and bus 31 are 0.2030 (p.u.) and 0.1034 (p.u.) respectively. Regards, Chixin function mpc = case30 %CASE30Power flow data for 30 bus, 6 generator case. % Please see CASEFORMAT for details on the case file

Re: case13659pegase -> AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE

1603.01533 > > .tar.gz file : https://arxiv.org/e-print/1603.01533 > AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and > PEGASE > > Cédric Josz > <https://arxiv.org/search/math?searchtype=author&query=Josz%2C+C>, Stéphane > Fliscounakis > <ht

RE: case13659pegase -> AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE

juillet 2019 20:06 À : MATPOWER discussion forum Objet : Re: case13659pegase -> AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE Hi Jean, I am having difficulty in downloading the zip file, can you provide another link if possible? Regards, Jubeyer On Thu,

Re: case13659pegase -> AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE

er are given. Looking into the zip file on arxiv web > site, you will also find some matlab code to run opfs, using Knitro. > > > > https://arxiv.org/abs/1603.01533 > > .tar.gz file : https://arxiv.org/e-print/1603.01533 > AC Power Flow Data in MATPOWER and QCQP Format:

RE: case13659pegase -> AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE

/1603.01533 AC Power Flow Data in MATPOWER and QCQP Format: iTesla, RTE Snapshots, and PEGASE Cédric Josz<https://arxiv.org/search/math?searchtype=author&query=Josz%2C+C>, Stéphane Fliscounakis<https://arxiv.org/search/math?searchtype=author&query=Fliscounakis%2C+S>, Jean Maeg

Re: CPF power flow did not converge

te: Thursday, July 11, 2019 at 10:54 AM To: "MATPOWER-L@cornell.edu<mailto:MATPOWER-L@cornell.edu>" mailto:MATPOWER-L@cornell.edu>> Subject: CPF power flow did not converge Hi all, I am trying to analyse the influence of topology changes (like disconnect branches)

Re: CPF power flow did not converge

Cynthia, Please see this MATPOWER FAQ<https://matpower.org/doc/faq/#pfconvergence> on debugging power flow divergence. Also, you forgot to attach your case file. Thanks, Shri From: on behalf of W Ruoyu Reply-To: MATPOWER discussion forum Date: Thursday, July 11, 2019 at 10:54

CPF power flow did not converge

on(mpopt,'cpf.stop_at','NOSE','cpf.step',0.05); mpct = mpc; " OutmailID: 123739424, List: 'matpower-l', MemberID: 82861091 SCRIPT: "set up target case with basecase mpct.gen(:,[PG QG]) = mpc.gen(:,[PG QG])*2 mpct.bus(:,[PD QD]) = mpc.bus(:,[PD QD

Re: Question about power flow for a system with faulted bus

forum Subject: Re: Question about power flow for a system with faulted bus Thanks Shri for your reply and the nice trick you mentioned; I never thought about it. How about using continuation power flow instead of a regular power flow? Is it possible to use it for this kind of problem? As you know

Re: Question about power flow for a system with faulted bus

Thanks Shri for your reply and the nice trick you mentioned; I never thought about it. How about using continuation power flow instead of a regular power flow? Is it possible to use it for this kind of problem? As you know, CPF is widely used to solve low voltage problem. Any idea? Thank you

Re: Question about power flow for a system with faulted bus

Ismael, Power flow with loads modeled as “constant power” faces convergence issue when the voltages are low. A common trick is to convert constant power loads to constant impedance loads for low voltages. In MATPOWER, you can convert all the loads to constant impedance using the options

Question about power flow for a system with faulted bus

Dear Matpower community, I am a Ph.D. student working in power system dynamic analysis. I use Matpower for computing the initial values of the system variables. I want to find the initial values of the algebraic variables (voltage magnitude, voltage angle, generator current phasors...) at the

Solving Power Flow with Node Breaker Model

All - Does anybody has experience solving power flow with node breaker model in matpower? Any ideas or suggestions? Thanks! Neeraj

Re: power flow with forward backward sweep algorithm for radial system

thanks a lot On Wed, May 1, 2019 at 4:14 PM Ilias Sarantakos wrote: > Hi Amir, > > The latest version of MATPOWER (7.0b1) includes three new power flow > algorithms for radial distribution systems selected via the three new > options for pf.alg, namely 'PQSUM', 'I

Re: power flow with forward backward sweep algorithm for radial system

Hi Amir, The latest version of MATPOWER (7.0b1) includes three new power flow algorithms for radial distribution systems selected via the three new options for pf.alg, namely 'PQSUM', 'ISUM', 'YSUM'. Kind regards, Ilias Ilias Sarantakos PhD Student Newcastle U

power flow with forward backward sweep algorithm for radial system

hi dears ! i need flow with forward backward sweep algorithm for radial system . is MATPOWER has a code ,? same runpf that doing load flow with neoton method? thanks a lot

Re: Isolated Bus - Power flow solution

John, MATPOWER’s power flow does not do a topology check to find isolated buses and islands. So, any isolated bus i needs to have its bus type set to None (4) -- mpc.bus(i, BUS_TYPE) = 4. If you want to find out which buses get isolated when the status of one or more lines changes then use

Isolated Bus - Power flow solution

Hi All, I had a question regarding matpower solution when a bus might get isolated. For example, changing the status of a line or lines causes a bus to be isolated/islanded. I think the power flow does not converge when such scenario occurs. Is there a way to handle this automatically and change

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