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

Hi, It's the file or casefile or M-file/MAT-file on which you are performing opf operations for analysis. e.g. runopf(case9) here *case9 *is the file he asked for. Thanks Mirish On Wed, Sep 16, 2020 at 6:43 AM Surbhi Aggarwal wrote: > Which file do I need to send you? > please specify it. > >

Re: Optimal power flow with DG connected

Which file do I need to send you? please specify it. Regards Surbhi Aggarwal On Tue, Sep 15, 2020 at 7:03 PM Ray Daniel Zimmerman wrote: > Looks like the Jacobian is singular. Feel free to send me the case > (off-list) and I’ll have a look. > > Ray > > > On Sep 14, 2020, at 11:35 PM,

Re: Optimal power flow with DG connected

Looks like the Jacobian is singular. Feel free to send me the case (off-list) and I’ll have a look. Ray On Sep 14, 2020, at 11:35 PM, Surbhi Aggarwal mailto:surbhiaggarwa...@gmail.com>> wrote: Even after doing everything, this error prompts out. Please help me out with this issue.

Re: Optimal power flow with DG connected

Even after doing everything, this error prompts out. Please help me out with this issue. Warning: Matrix is singular to working precision. > In mplinsolve (line 75) In newtonpf (line 110) In runpf (line 260) Regards Surbhi Aggarwal On Mon, Sep 14, 2020 at 7:31 PM Ray Daniel Zimmerman

Re: Optimal power flow with DG connected

You would have to confirm the cause of the non-convergence before drawing any conclusions. You may find FAQ #5 helpful. Ray On Sep 12, 2020, at 6:43 AM, Surbhi Aggarwal mailto:surbhiaggarwa...@gmail.com>> wrote: Hello If the system does not

Re: Optimal power flow with DG connected

Hello If the system does not converge within 10 iterations, can we say that it is one of the most severely affected lines in contingency studies? Or any other explanation for this non-convergence? Regards Surbhi Aggarwal On Sat, Sep 12, 2020 at 10:40 AM Surbhi Aggarwal wrote: > Hello > Thank

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 > the number of

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

Hello Everyone, I tried your suggestions and it somehow helped me. Now my doubt is " If I want to increase my number of iterations, what steps I have to do"? Please help me out Regards Surbhi Aggarwal On Wed, Sep 9, 2020 at 7:50 PM Ray Daniel Zimmerman wrote: > I also suspect that the network

Re: Optimal power flow with DG connected

I also suspect that the network becomes disconnected by removing certain lines. You can check the connectivity using case_info() or find_islands(). If there are

Re: Optimal power flow with DG connected

Hi Surbhi, Could you please check the continuity of the system before running opf? I mean to say if you run opf for (n-1) criteria the system should be still well connected. There shouldn't be any island within the system itself. Perhaps you can test your model by removing any one parallel line

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) In