Adaptive Comprehensive Auto-Reclosing Scheme for Shunt Reactor-Compensated Transmission Lines.

After a tripping of a transmission line, if the fault is transient, fault arc may be extinguished in three different kind of periods: initial, middle, and ending period. Existing adaptive auto-reclosing (AAR) schemes cannot cover all kind of situations, which seriously affects application of those AAR schemes. An adaptive comprehensive auto-reclosing (ACAR) scheme for shunt reactor-compensated transmission lines is proposed in this paper. Based on a novel partial tripping method (PTM), two criteria are included in the proposed ACAR scheme. The first criterion is based on fault phase reactive power low-frequency component (RPLC), which can deal with faults extinguished in initial and middle periods; and the other criterion is based on high-frequency component distortion (HCD), which can deal with faults extinguished in middle and ending periods. The theoretical analysis and simulation experiments based on PSCAD/EMTDC indicate that, for different fault categories, locations, and transition resistances, the proposed ACAR can distinguish transient faults from permanent ones and determine the fault extinction time rapidly and accurately. [ABSTRACT FROM AUTHOR]