A master thesis from Aalborg University
Faults between AC and DC lines
Author(s)
Term
2. term
Education
Publication year
2021
Submitted on
2021-05-27
Pages
46 pages
Abstract
HVDC is becoming more appealing when it comes to the transmission of power through long distances. An option when implementing new lines is for HVDC lines to share the same transmission tower than HVAC lines. However, some technical issues must be analysed like how the hybrid ACDC network reacts under a fault. This project studies the behavior of the system under hybrid fault topologies which involve both systems so a suitable protection system can be implemented. Different fault locations are considered for each model. The faults in the AC-DC system are compared to individual AC and DC systems in order to assess the difference. Hence, three models are simulated: a pure AC system, a pure DC system and a AC-DC system under different fault conditions. Then the results are evaluated for each of the systems as a first step for choosing the best suited protection system.
Keywords
HVDC ; Transmission lines ; Fault ; Hybrid faults ; AC-DC
Documents
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