Hi Carlos,
Event:
See MATPOWER manual section 5.5 for description of ‘events’ in MATPOWER.
Basically, an event is a point on the continuation curve where some sort of
limit or threshold is met. For example, a generator hitting its active/reactive
power limit is an event. The full list of events MATPOWER supports is given in
the manual. For each event located, MATPOWER saves information for the event
(including a descriptive text) in its output struct (see results.cpf.event).
Rollback:
On detection of each event, MATPOWER locates or pinpoints the event using a
‘rollback’ mechanism where the continuation step is reverted and the step-size
reduced successively till the event is located, i.e., some tolerance is met for
the event. MATPOWER prints whenever the step is reverted (or “rolled back”)
during the event location process.
Look up Regular Falsi or False Position method on Google if you need additional
details on event detection and location.
Hope this helps.
Shri
From: bounce-126939018-83436...@list.cornell.edu
on behalf of Carlos A. Castro
Date: Monday, October 31, 2022 at 4:01 PM
To: MATPOWER-L@cornell.edu
Subject: Question regarding Matpower's continuation power flow
Check twice before you click! This email originated from outside PNNL.
Dear friends
I have been running the continuation power flow for several networks.
In the case of "case2869pegase", I counted 92 rollbacks. However, "events" is a
struct with dimension [1x98].
I was expecting that the dimension of "events" was [1x92], that is, the same as
the number of rollbacks.
I would appreciate to hear from you regarding the relationship between
rollbacks and events. What are those events specifically? Which events do not
result in rollbacks?
Thanks a lot for your attention and help.
Regards,
Carlos A. Castro.
--
Prof. Carlos A. Castro
ccas...@ieee.org<mailto:ccas...@ieee.org>
