Phasor-based secondary arc extinction detection method for shunt compensated transmission lines

Abstract

Secondary arc extinction detection (SAED) is essential for adaptive single-phase auto-reclosing (ASPAR) success. Many SAED/ASPAR methods have been proposed in the literature. However, most of them do not present a practical approach for field implementation. A new methodology is proposed aiming to provide an effective and practical phasor-based SAED/ASPAR scheme for shunt compensated transmission lines. That scheme consists in analyzing the line side voltage phasors in the modal domain to safely and rapidly identify the secondary arc extinction, requiring only the voltage phasors at one line terminal. Furthermore, it can be easily implemented in readily available IED (Intelligent Electronic Devices), such that no additional hardware or equipment is required, being quite suitable for real-world applications. Therefore, a new mathematical formulation is developed considering the shunt and neutral reactors effects. Then, the SAED/ASPAR applicability and limitations for shunt compensated lines are clearly defined. Data from the Brazilian Power Grid and field oscillographic recordings are used for case studies. The results attest the efficiency and reliability of the proposed methodology