Voltage Profile Improvement in Railway Electric Network Using SFCL Under Different Fault Conditions

Abstract

Trams and trains on the railroad are propelled by a railway electrification system, which lacks an on-board prime mover or a local fuel source. Single-phase source is used in an electric train system, and it is fed by a three-phase transmission line via a Scott transformer. Additionally, the time-varying load characteristics of the electric train system changes quickly. Due to the large single-phase load's quick changes, an unbalance is created. A transmission line becomes imbalanced as a result of the unbalanced load. Imbalance in voltage at the source side effects the equipment used there by reducing the generator's capacity to produce power and lowering the output of the other transmission line facilities. In order to account for and regulate electric power, numerous flexible ac transmission methods are used on transmission lines. In these systems, a voltage imbalance results in a control mistake. This paper proposes a superconducting fault current limiter which is used to limit the imbalance in voltage in transmission line connected to a Scott transformer. To examine the outcomes of the suggested approach, transient simulations are additionally added in the paper. The main theme of the paper is to decrease the fault currents in railway electric network using SFCL and increasing the Voltage Profile.