Re: Negative soft overload costs

Hi Paul, Have a look at the implementation described in Section 7.5.4 in the User’s Manual . You’ll notice that the flow violation variable is defined using inequality constraints which only works if you have a positive cost on

Negative soft overload costs

Hi all, I'm doing some work with MATPOWER on line congestion indices. As part of that, I'm interested in what the flow on a line might be in the worst-case conditions. This corresponds to an optimal power flow with an objective function to maximise the flow on a particular line. I'm happy wit

Re: price sensitive loads

k sir i'll try that. On Thu, Feb 18, 2016 at 10:25 PM, Ray Zimmerman wrote: > I’m afraid your questions are not very specific or clear. But you should > be able to accomplish what you want using some of the following functions. > > The load2disp() >

Re: price sensitive loads

sir when converting fixed loads to dispatchable we need to save with some fname from below code. MPC = load2disp(MPC0); MPC = load2disp(MPC0, FNAME); MPC = load2disp(MPC0, FNAME, IDX); MPC = load2disp(MPC0, FNAME, IDX, VOLL); for that i am writng as below mpc=loadcase(case6ww); mpc1

Re: power flow question

Good idea. That should probably be an option though. Ray > On Feb 18, 2016, at 11:58 AM, Abhyankar, Shrirang G. wrote: > > I agree. Having the warnings for all generators, voltages, etc. would be > helpful for the cases when users are also varying the generation on PV buses. > I would eve

Re: price sensitive loads

You are attempting to save a file named ‘mouni’ to your current working directory, where you apparently have no write permissions. Either change directory to somewhere where you have write permissions, or specify the full path in the file name you pass to load2disp(). I’m not sure what you thin

Re: power flow question

I agree. Having the warnings for all generators, voltages, etc. would be helpful for the cases when users are also varying the generation on PV buses. I would even like MATPOWER fixing the active power at PV buses to the max. or min. limit, if the generation exceeds these limits, and informing t

Re: price sensitive loads

I’m afraid your questions are not very specific or clear. But you should be able to accomplish what you want using some of the following functions. The load2disp() function simply converts fixed loads to dispatchable o

Re: price sensitive loads

sir whatever the path i am setting the same error i am getting. file='E:\project\matpower\mouni.txt'; >> [pathstr,name,ext]=fileparts(file) pathstr = E:\project\matpower name = mouni ext = .txt >> mpc=loadcase(case6ww); >> mpc1=load2disp(mpc); >> mpc1=load2disp(mpc,'mouni'); Error using s

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

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 should be limited to the swing bus power injection … why not include all of the other generator, voltage and branch flow limits, all of which can

Re: price sensitive loads

The error is “Permission denied”, so it looks like you are attempting to save the file to a location where you do not have write permissions. Ray > On Feb 18, 2016, at 8:38 AM, VANJARAPU VENKATARAONAIDU > wrote: > > i tried like this but i am getting as below.what i have to do. > >> file

price sensitive loads

sir i want some clarifications about price sensitive loads. can we show the load variations at different buses during different periods for an ieee14 bus system using matpower .if yes can we do that using load2disp function.if yes how.can anyone quote with a small example please.i am trying from ma

Re: price sensitive loads

i tried like this but i am getting as below.what i have to do. >> file='D:\matpower\mouni.txt'; >> [pathstr,name,ext]=fileparts(file) pathstr = D:\matpower name = mouni ext = .txt >> mpc=loadcase('case9'); >> mpc1=load2disp(mpc); >> mpc1=load2disp(mpc,'mouni'); Error using savecase (line 1

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: Mat power output Result

Mohamed, Your question is too vague for anyone here to provide meaningful answers. Regarding (2), I believe the System Summary output from runpf() will give you the total P and Q losses in the network. Regarding (1): you need to define what you mean by V deviation. Do you mean deviation from the

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 the

Re: Mat power output Result

Dear Mohamed, Before "runpf(mpc);" you could write "Look_Here=".Then you will have the solution saved in the variable "Look_Here", then you only need to find the values you need in the right collumn and line. Kind regards, El Miércoles 17 de febrero de 2016 19:48, Mohamed Taleb escribió:

Re: price sensitive loads

Please read the previous e-mails in this thread (I just answered the same question to someone else today) … you are trying to save your file to a directory for which you do not have write permissions. Change to a directory for which you do have write permissions before saving. Ray > On Feb