From: Ray Zimmerman mailto:r...@cornell.edu>>
Reply-To: MATPOWER discussion forum
mailto:matpowe...@list.cornell.edu>>
Date: Monday, March 23, 2015 at 1:49 PM
To: MATPOWER discussion forum
mailto:matpowe...@list.cornell.edu>>
Subject: Re: Blackout in the USA - Islands VS Whole System
Well, con
Ray,
it is not just a freak coincidence, the system of linear equations in DC
powerflow lends to a solution for almost all cases I tried where islands
are formed. With the example you gave here, you hit the nail on the head.
It lends to solution even for non-matching load and generation (for
situ
I hadn't thought of limiting the mpc.gen(wind_farm,10) to be equal to
mpc.gen(wind_farm,9). Previously I had mpc.gen(wind_farm,10)=0 , so when wind
output was higher than the total load, simply results.gen(wind_farm,2) was
almost equal to the total load, and the rest of the wind output was cu
output of mpver :
MATPOWER Version 4.114-Dec-2011MATLAB
Version 8.113-Feb-2013 Release: (R2013a) Optimization Toolbox
Version 6.313-Feb-2013 Release: (R2013a) MIPS
Version 1.007-Feb-2011BPMPD_MEX
Hi Shri,
Thanks a lot for this. It will be a great help for my graduate research.
Actually I was kind of stuck as to how should I go forward.
Thanking you again & Regards,
Arun Nair
On Mon, Mar 23, 2015 at 12:17 PM, Abhyankar, Shrirang G. <
abhy...@mcs.anl.gov> wrote:
> I¹ve started working o
Later versions of Knitro changed their Matlab interface and have not been
tested with older versions of MATPOWER that used an older interface, so I’m not
sure what to expect with that combination.
Could I see the output of mpver and the output of t_opf_knitro?
Ray
> On Mar 23, 2015, at 1:
Well, conceptually, no I’m afraid it doesn’t answer my question. For example,
suppose you have a system with a single slack bus and you open several lines
and create an island with more load than generation, with no slack bus. How is
it possible for a DC power flow to converge* to any meaningful
I¹ve started working on adding ZIP load model in MATPOWER. Will try to
update you in a couple of days.
Shri
-Original Message-
From: Ray Zimmerman
Reply-To: MATPOWER discussion forum
Date: Monday, March 23, 2015 at 10:40 AM
To: MATPOWER discussion forum
Subject: Re: runpf using differe
I am using matpower 4.1 and knitro 9.1.0.
And also all tests are successful when I type test_matpower. Why should there
be a problem with older matpower versions?
Regards,Angelina
From: r...@cornell.edu
Subject: Re: knitro does not converge
Date: Mon, 23 Mar 2015 11:59:08 -0400
To: matpowe...@lis
AC powerflow has convergence problem in many scenarios which we all know.
The DC powerflow converges for the whole system even if this system has one
or many islands; however, if a system contains one or many islands the AC
powerflow does not converge. Does this answer your question?
On Mon, Mar 2
Have you simply tried it? I can’t think of any reason that a negative output
from the slack bus should cause problems.
Ray
> On Mar 20, 2015, at 1:32 PM, angelina sirri wrote:
>
> Dear all,
>
> I am trying to simulate active network management in distribution network in
> 11kv. I have a
Knitro solves it just fine on my machine. Are you using the current versions of
both MATPOWER (5.1) and Knitro (9.1.0)? (type mpver to see what versions you
have installed) And does it pass all of the tests? (type test_matpower).
Ray
> On Mar 20, 2015, at 10:58 AM, angelina sirri wrote:
>
The power flow in branch 3 is not an optimization variable, so you need to
express your cost as a function of the optimization variables. For an AC power
flow model, this is non-linear, so that’s problematic. For a DC power flow
model, however, the flow is a linear function of the angles so you
I don’t understand approach (1). I don’t know why you say that DC power flow
implies you don’t have to keep track of islanding. How does the AC or DC power
flow make a difference here?
Ray
> On Mar 20, 2015, at 6:08 AM, Bijay Hughes wrote:
>
> Hej all,
>
> I am modeling blackout in the
MATPOWER does not support ZIP load models in any of its programs, PF, CPF or
OPF. So you would have to implement your own.
If you already understand how to implement the different load models in a
Newton-Raphson power flow and have specific questions about MATPOWER’s power
flow implementation t
15 matches
Mail list logo
