Patent ID: 8596434

Claim:
An electric railway system configured to comprise an electric car and an electric-power supply device that supplies electric power to the electric car, wherein the electric-power supply device comprises: a power source; and an overhead conductor portion connected to the power source, and the electric car comprises: a power collector that is installed on a roof of the electric car, has a contact conductor portion contactable to the overhead conductor portion, and is capable of performing a raising operation and a lowering operation of the contact conductor portion based on an instruction; a switching unit that is connected to the power collector and performs opening and closing of a main circuit as a supply route of electric power; an electric-power conversion device that is connected to the switching unit and performs an electric power conversion; an electric-power storage device that is connected to the electric-power conversion device and stores electric power; an electric motor that is driven by the electric-power conversion device and drives the electric car; and a control unit that controls at least the switching unit, and the control unit is configured to perform an on/off control of the switching unit and the electric-power conversion device based on at least two different physical parameters indicating a level of a contact state between the overhead conductor portion and the contact conductor portion.