Development of a new model to represent polyphasic transmission lines in Electromagnetic Transients Programs (EMT)

• Grant number: 19/20311-7
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: September 01, 2020
• End date: February 29, 2024
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Principal Investigator: Maria Cristina Dias Tavares
• Grantee: Thassio Matias Pereira
• Host Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 21/11726-9 - Solution of numerical oscillations problems in the voltage- and frequency-dependent line model (VFDLM) and application of parallel simulation, BE.EP.DR

Abstract

This research project is presented by Thassio Matias Pereira, a regular master student of the Graduate Program of the Faculty of Electrical Engineering of the State University of Campinas (UNICAMP), with the Department of Energy Systems, under the guidance of Professor PhD. Maria Cristina Dias Tavares. The research project consists in the development of a new model to represent polyphase transmission lines in Electromagnetic Transients Programs (EMT), which will allow the representation of the corona effect and frequency dependence of the line parameters. The corona effect is a phenomenon commonly observed during overvoltages in overhead transmission lines, and occurs when the electric field on the conductor's surface exceeds the critical disruptive voltage of air. This phenomenon plays a predominant role in the attenuation and distortion of traveling waves, which makes his adequately representation digital simulations extremely important to obtain accurate and reliable results. Under these circumstances, this research will focus on the development of a new line model applicable to EMT programs, which will capable to represent the wave propagation phenomenon, the frequency dependence of line parameters and the corona effect directly in the line equations. In addition, this model will allow the corona effect to be represented as a distributed parameter, and will represent with good accuraccy the variations in capacitive coupling between phases when the line is under corona. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PEREIRA, THASSIO MATIAS; TAVARES, MARIA CRISTINA. A New Approach to Represent the Corona Effect and Frequency-Dependent Transmission Line Models in EMT-Type Programs. IEEE Transactions on Power Delivery, v. 37, n. 6, p. 10-pg., 2022-12-01. (19/20311-7)

PEREIRA, T. M.; ALIPIO, R.; TAVARES, M. C.. Analysis of overvoltages across line insulator strings considering the ground-wire and phase conductors corona✰. Electric Power Systems Research, v. 223, p. 7-pg., 2023-10-01. (22/01896-7, 19/20311-7)

PEREIRA, T. M.; ACOSTA, J. S.; SANTIAGO, J. A.; TAVARES, M. C.. Overvoltages due to line faults on a HWL transmission line: Corona effect and mitigation techniques. Electric Power Systems Research, v. 224, p. 7-pg., 2023-11-01. (22/01896-7, 19/20311-7)