A New Method for Faulted Line Identification in Neutral Non-Grounded Distribution Systems
It is well-known that, the identification of the single-phase to ground faulted line in neutral non-grounded distribution systems is a difficult problem, due to its very small faulted current. This paper proposes a new method for the solution of this problem. The principle of the proposed method is to convert the neutral non-grounded system into a neutral grounded system temporarily by using a triggered vacuum switch based controllable short-circuit equipment. By time-domain numerical simulation, the proposed method is evaluated, and the simulation results have shown the effectiveness of the proposed method.
D. Li and F. Z. Wang, "A New Method for Faulted Line Identification in Neutral Non-Grounded Distribution Systems", Advanced Materials Research, Vols. 383-390, pp. 2496-2500, 2012