Dynamic Changes in the Models of Wind and Photovoltaic Power Plants in the ONS Electromechanical Database: After the Partial Black-out of August 2023

Abstract

This work analyzes a very relevant and recent event in the memory of the Brazilian electricity sector, which was the partial black-out of 08/15/2023. The post-operation analyses of this event identified modeling flaws in wind and photovoltaic generators which meant that the database used until then behaved differently from the equipment in the field. This paper explores the suitability of system modeling for previously defined purposes and the reasons for the adjustments made to the ONS database for electromechanical transient studies so that it is representative of the various events to which the power system is subject.