On evaluating the effect of transmission lines capacitive current on distance protection

• Published in: 2018 Simposio Brasileiro de Sistemas Eletricos (SBSE) pp. 1 - 6
• Main Authors: de Oliveira Silva, Suellen Paula, Taveres, Ina Tayane Barbosa, Silva, Kleber Melo e
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.05.2018
• Subjects: Capacitance; capacitive current effect; distance protection; Integrated circuits; Manganese; Performance evaluation; Power transmission lines; Radio frequency; Robustness; transmission lines
• DOI: 10.1109/SBSE.2018.8395642

This paper presents the performance evaluation of alternative strategies to mitigate the capacitive current effect of transmission lines on distance protection. In order to do so, two algorithms reported in the literature on the subject were evaluated. The first one is based on the π-equivalent line model, whereas the second one uses lumped capacitance (π-nominal model). Their performances have been compared with the one of traditional distance protection formulation. The Alternative Transients Program (ATP) was used to model a 60 Hz/500 kV transmission line 200 km long, in which a wide variety of faults were simulated. The performances of the algorithms are evaluated by using parametric sensitivity analysis, thereby only one parameter value changes at a time, providing a more comprehensive understanding of the relationship between each parameter and the performance of the algorithms. In order to do so, the analysis was carried out using the response of the algorithms during the fault steady-state regime. The obtained results reveal that the alternative strategies do not lead to significant improvements, such that the traditional formulation is still the simpler and more robust solution to distance protection of transmission lines.