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 <bounce-126939018-83436...@list.cornell.edu> on behalf of Carlos A. Castro <ccas...@unicamp.br> Date: Monday, October 31, 2022 at 4:01 PM To: MATPOWER-L@cornell.edu <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>
