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Application of a robust faulted phase selector to high-resistance and weak-infeed fault conditions on a 1000-kV UHV transmission line

2021; Elsevier BV; Volume: 197; Linguagem: Inglês

10.1016/j.epsr.2021.107244

1873-2046

Renzo Fabián Espinoza, Ozenir Dias, Maria Cristina Tavares, Yuri Percy Molina Rodríguez,

HVDC Systems and Fault Protection

This work proposes the use of a novel faulted phase-selection phasor-based algorithm to solve the high-resistance and weak-infeed fault condition selection problem in existent long compensated transmission lines. The algorithm was originally developed for future half-wavelength lines (3000 km for 50 Hz system or 2500 km for 60 Hz), and was slightly modified and tested in a real 645 km 1000 kV Ultra High Voltage transmission system. The algorithm was implemented in a programmable protective relay and tested using a real-time simulator. A series of tests under extreme conditions (such as high impedance fault and very week infeed system together) were conducted to evaluate the performance and robustness of the proposed algorithm.