There are two main options ...
If a linearized DC model of the network is adequate for your purposes, then
MOST is probably the way to go. It can solve a full multi period OPF problem
taking into account ramp limits. This allows restrictions in one period to
affect the dispatch in previous periods, finding the dispatch trajectories that
are optimal for the entire planning horizon.
The other option is simply to run the single-period OPF (using runopf)
sequentially for each hour in a loop and use the ramp rate to limit the
feasible dispatch range in the input to runopf. That is, you would set the PMIN
and PMAX for each generator in hour t to the more restrictive of (1) the
physical capacity limits of the generator, (2) the maximum down/up ramp from
the hour t–1 dispatch.
The latter is simpler and allows you to use an AC network model, but dispatches
in a given hour are not affected at all by future hours, only past hours, so
the overall trajectory may not be optimal. For example, you won’t start ramping
up a cheaper slow ramping unit ahead of time to be available for a peak hour,
since that would require “look-ahead”.
Hope this helps,
Ray
On Mar 1, 2020, at 12:32 PM, yang_hong_yue
<[email protected]<mailto:[email protected]>> wrote:
Dear Ray,
I want to run opf with 24h daily load, how can I add the ramp rate constraint
in code? Can I make it in add some codes or in MOST?
Thanks a lot.
Yang.
------------------ Original ------------------
From: Ray Daniel Zimmerman <[email protected]<mailto:[email protected]>>
Date: Sat,Feb 29,2020 6:36 AM
To: MATPOWER-L <[email protected]<mailto:[email protected]>>
Subject: Re: how to modify parameter to redcuce branch power
The RATE_A column of the branch matrix is used by the OPF to constrain the
branch flow.
Ray
On Feb 28, 2020, at 7:35 AM, Yang
<[email protected]<mailto:[email protected]>> wrote:
Dear everyone,
I want to reduce the power of branch, which parameter value should be changed
in OPF?
For example,if I want to reduce 50% power of branch 15-23 in case30.m, how can
I make it?
Thanks a lot.
Best wishes.
Yang
