The time resolution is completely up to you when you are running your own
sequence of snapshots using runopf() as in your example. That is, a MATPOWER
OPF is for a specific instant in time, so it knows nothing of any time
resolution. You are free to define whatever tilme step you like for re-solving
a new steady-state solution. Obviously, once you get to very short time scales
you really need to start taking into account system dynamics, so a steady-state
solution, like an OPF, is not what you want.
Best regards,
Ray
On Mar 15, 2024, at 3:13 PM, Lichen Wu <l...@uwyo.edu> wrote:
Thank you, Ray!
It really helps.
for i = 1:length(profiles)
mpc.bus(2, PD) = 150 * profiles(i);
results = runopf(mpc);
vm_results(i) = results.bus(2, VM);
end
Could you please clarify the defined time resolution, such as timestep,
microsecond, second, or hour?
If so, is it feasible to redefine this time resolution?
Best,
Lichen
________________________________
From:
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<bounce-128084230-96962...@list.cornell.edu<mailto:bounce-128084230-96962...@list.cornell.edu>>
on behalf of Ray Daniel Zimmerman <r...@cornell.edu<mailto:r...@cornell.edu>>
Sent: Tuesday, March 12, 2024 2:06 PM
To: MATPOWER-L <matpowe...@list.cornell.edu<mailto:matpowe...@list.cornell.edu>>
Subject: Re: Inquiry about Bus Voltage Variation in MOST Examples
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Hello Lichen,
I’m afraid MOST uses a DC network model. That is, bus voltage magnitudes are
not modeled at all and instead are assumed to be approximated by 1 p.u. See
Section 3.7 in the MATPOWER User’s
Manual<https://matpower.org/docs/MATPOWER-manual-7.1.pdf> for more details on
the DC modeling assumptions.
Depending on your application, you may not need to solve a multiperiod
optimization, but rather a sequence of single-period optimizations or
simulations. For example, it’s possible that calling runopf() in a loop would
give you what you want.
Hope this helps,
Ray
On Mar 7, 2024, at 4:07 PM, Lichen Wu <l...@uwyo.edu<mailto:l...@uwyo.edu>>
wrote:
Dear All,
I hope this message finds you well. I am currently working on replicating a
specific scenario from research
paper,https://doi.org/10.1016/j.apenergy.2020.115523, voltage smoothing control.
I attempted to reproduce the bus voltage variation every second (shown in
fig1.fig19.png) using MOST's 7.2.1 Example 5 – Deterministic Multiperiod OPF
with Delta_T = 1 (load and wind profiles from fig2.Figure 7-2.png). However, it
seems that the bus voltage remains constant at 1 p.u (shown in fig3.png).
I have a couple of questions:
1.
1. Could you guide me on where to view the bus voltage results for MOST 7.2.1
Example when solved with `mdo = most(mdi, mpopt);` (Delta_T=1 hour, number of
periods = 12)?
1.
2. Are there any available examples closer to the scenario of "Bus voltage
variation every second"?
I appreciate your time and assistance in this matter.
Best regards,
Lichen Wu
Graduate Research Assistant at University of Wyoming, USA
<image.png><Outlook-qkgmsngn.png><image.png>
<fig1.fig19.voltage.smoothing.png><fig2.figure7-2.profiles.png><fig3.mdo.flow(5).mpc.bus.png>
