Virtualização de sistemas de proteção e controle de subestação com utilização de merging unit e IED virtual integrado ao SAGE

Abstract

The IEC 61850 standard and its updates have had a significant impact on substation protection, automation, and control (PAC) systems around the world. New advances are implemented and evaluated every day, such as the virtualization of intelligent electronic devices (IEDs), the subject of this study. The virtualization of IEDs stems from the need to reduce maintenance and hardware replacement costs, optimize productivity, and support the recovery of problems with physical IEDs in

Classificação: Pública

installations. The aim of this work is to apply virtual IEDs (VIEDs), improving those developed at the Intelligent Electrical Networks Group (GREI) of the Federal University of Ceara (UFC), in a test platform environment that simulates a substation that is part of the Basic Grid. The performance of VIEDs was assessed on the process bus network, with the traffic of information digitized by a Merging Unit (MU), and on the station bus, with the exchange of messages between the Human Machine Interface (HMI) supervisory software and the manageable switches. To test and deploy the VIEDs, a PAC platform was set up in the structured laboratory at the Companhia Hidroeletrica do São Francisco (CHESF - Fortaleza) with physical IEDs, MU, a six-phase protection relay tester, a Human Machine Interface (HMI) with the Open Energy Management System (SAGE) and notebooks running the VIED and SAGE applications in the Linux operating environment. On the platform, the VIED's response under fault situations was evaluated for the overcurrent protection functions 50/50N (instantaneous) and 51/51N/51V (timed), 67/67N (directional) and 62BF, compared with physical IEDs present on the platform, with the same protection settings as the VIED. IED-VIED communication was tested using GOOSE and Sampled Values (SV) protocols and VIED-SAGE communication using MMS protocol. These tests validated the full operation of the VIED, using Wireshark software, ACMViewer and the MU's HMI. The results of the tests prove the efficiency of a VIED, both in vertical and horizontal communication, as well as in reading analog values from the SV. VIEDs enable a new aspect of virtualization of physical devices, and through the implementation of applications embedded in SAGE, can replace the physical protection of a span with a virtual one in the protection functions evaluated. They are also an appropriate source of training for O&M personnel in understanding the protocols used, qualifying them in the state of the art in the protection of electrical power systems and applied in intelligent substations.