m: on behalf of Simone Fratton
Reply-To: MATPOWER discussion forum
Date: Tuesday, June 1, 2021 at 4:08 AM
To: "matpowe...@list.cornell.edu"
Subject: Continuous power flow question
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Hi,
I would like to ask where I c
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
"continuous power
your fans! Thank you very much!
-- --
??: "Ray Zimmerman";;
: 2016??6??3??(??) 0:09
??: "MATPOWER discussion forum";
????: Re: AC power flow question
If you look more carefully at the code (and
If you look more carefully at the code (and the comments) you’ll see that the
generator is turned off temporarily in line 267, and the load is adjusted to
include the injection. Later in line 307, the process is reversed, turning the
generator back on. Without studying the code in more detail, I
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 limit, the correspondin
forum <mailto:matpowe...@list.cornell.edu>>
> Date: Thursday, February 18, 2016 at 10:34 AM
> To: MATPOWER discussion forum <mailto:matpowe...@list.cornell.edu>>
> Subject: Re: power flow question
>
> I agree that checking for exceeded limits and warning about th
.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
should be limited to the swing bus power injection … why not include all of the
other gene
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
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
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
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
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.
> El 17 feb. 2016 1:58 PM,
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.
>
> To my surprise, pow
atpowe...@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>"
mailto:matpower-l@cornell.edu>>
Subject: power flow question
Dear Ray,
I tried to modified load of ‘case9’ to ex
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
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