Details

Autor(en) / Beteiligte

• Lopes, Felipe V.
• Leite, Eduardo Jorge S.
• Ribeiro, João Paulo G.
• Piardi, Artur B.
• Fabián Espinoza, Renzo G.
• Scheid, Allan V.
• Zat, Guilherme
• Otto, Rodrigo B.

Titel

Phasor-based fault location challenges and solutions for transmission lines equipped with high-speed time-domain protective relays

Ist Teil von

• Electric power systems research, 2020-12, Vol.189, p.106617, Article 106617

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Locating faults on transmission lines is an important task.•Most existing applications use phasor-based fault locators.•Reduced fault period can affect the performance of phasor-based fault locators.•Fault location issues due to short fault period are demonstrated through ATP and RTDS simulations.•Statistical analyses improve phasor-based fault location performance. This paper presents a study on the performance of phasor-based fault location methods under reduced fault period conditions. Such a scenario can arise in lines equipped with high-speed circuit breakers (CBs) and time-domain protective relays, so that the fault can be eliminated even before it reaches its steady-state. Considering this context, challenging scenarios that may arise during phasor-based fault location procedures are firstly addressed, and then statistical approaches for fault location estimation sample processing are investigated, evaluating their advantages and limitations. Initially, Alternative Transients Program (ATP) fault simulations are carried out to generate realistic fault records, which are played back into actual micro-processed relays equipped with both high-speed time-domain protection functions and phasor-based fault location algorithms. Finally, by means of tests using a Real-Time Digital Simulator (RTDSTM) and an actual Digital Fault Recorder (DFR), different procedures to analyze phasor-based fault location data are assessed. The obtained results show the statistical processing of fault location estimations can improve existing fault location procedures in some cases, but not completely solving the problem if CBs come to be faster than those in the present technology.