13 Years' Experience with Single-Phase Reclosing at 345 KV

Description is given of the Quebec power system of Alcan Smelters and Chemicals Ltd, with particular reference to two 345 kV transmission lines equipped with single-phase automatic reclosing and transfer trip. Performance of the reclosing feature over a 13- year period is reported and evaluated. Influence of counterpoise and overhead shield wires on reclosing and on lightning performance is discussed. Results indicate that the single-phase reclosing is successful in maintaining system stability, with either or both lines in operation.