Fast adaptive reclosing in double-circuit transmission lines for improving powersystem stability based on harmonic analysis scheme

Abstract

An appropriate method is proposed for identifying permanent faults from transient faults in double-circuit transmission lines. This method could be used in adaptive single phase auto-reclosures in order to diagnose between permanent and transient faults, determine extinguishing time of the secondary arc, and calculate issuing time of reclosing commands during the occurrence of transient single phase to ground faults. The proposed method is based on harmonic analysis of the adjacent healthy circuit and could be an effective solution for blocking permanent disconnection of the power flow, improving stability, and maintaining the power network synchronism. In this paper, transient and permanent faults are simulated on a typical power system, and then current harmonics of the healthy circuit terminal are extracted and finally the proposed index for identifying the fault type is applied. In the case of transient faults, this method determines the minimum time needed for a fast successful adaptive reclosing in the network and thus prevents instability and nonsynchronism in both sides of the transmission line. Results of the various simulations run in EMTP-RV verifies accurate performance of the proposed approach.

A Comprehensive Review of Auto-Reclosing Schemes in AC, DC, and Hybrid (AC/DC) Transmission Lines

“…In the permanent case, reclosing was blocked. Analyzing the harmonics in transmission lines can help in detecting transient faults in auto-reclosing schemes [64]. Such schemes should have accurate harmonic ratios to instantly detect faults.…”

Intelligent fault analysis of transmission line using phasor measurement unit incorporating auto-reclosure protection scheme

“…The proposed methodology is presented to distinguish the temporary fault and permanent fault. Once the temporary fault is cleared and the secondary arc is quenched, the reclosing signal is sent to circuit breaker [19]. The total harmonic distortion (THD) is used to identify the presence of the secondary arc [20].…”