Inclusion of the frequency dependence in the Bergeron model: representation of short and long transmission lines considering electromagnetic transients resulting from switching operations and lightning strikes

Author(s)

Pablo Torrez Caballero

• Document type: Doctoral Thesis
• Press: Ilha Solteira. 2019-01-14.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira
• Defense date: 2018-12-17
• Advisor: Sérgio Kurokawa

Abstract

The main objective of our project is to develop a transmission line model that takes into account the main characteristics demanded by a model of this electrical system component, i.e., be developed directly in the time-domain, consider the distributed nature of the line parameters and take into account the frequency dependence of the longitudinal parameters. The proposed model is based on the Bergeron model, which is a transmission line model directly developed in the time domain that takes into account that the transmission line parameters are distributed along its length. In the proposed model it will be taken into account that, due to earth-return effect and skin impedance, the longitudinal parameters (longitudinal resistance and longitudinal inductance) vary in relation to the frequency. These parameters will be approximated by rational functions and will be added to the Bergeron model. The developed model will be used to represent short and long transmission lines in simulations resulting from switching operations and lightning strikes. Because of the model being directly developed in the time-domain, the proposed model can be easily implemented in programs ATP-like (Alternative Transients Program) and will be a useful tool in power system transient analysis. (AU)

• FAPESP's process: 14/17051-0 - Inclusion of the frequency effect on the Bergeron Model: representation of the short and long transmission lines taking into account electromagnetic transients resulting from switching operations and lightning
• Grantee: Pablo Torrez Caballero
• Support Opportunities: Scholarships in Brazil - Doctorate